f_B and f_Bs with maximally twisted Wilson fermions (2009)
Blossier, ETM Collaboration: B., Dimopoulos, P., Frezzotti, R., Herdoiza, G., Jansen, K., Lubicz, V., ...
We present a lattice QCD calculation of the heavy-light decay constants f_B and f_Bs performed with Nf=2 maximally twisted Wilson fermions, at four values of the lattice spacing. The decay constants...
Kaon oscillations in the Standard Model and Beyond using Nf=2 dynamical quarks (2009)
Bertone, V., Dimopoulos, P., Frezzotti, R., Gimenez, V., Lubicz, V., Mescia, F., ...
We compute non-perturbatively the B-parameters of the complete basis of four-fermion operators needed to study the Kaon oscillations in the SM and in its supersymmetric extension. We perform...
Di Vita, S., Haas, B., Mescia, F., Lubicz, V., Simula, S., Tarantino, C.
We present lattice results for the form factors relevant in the K -> pion and D -> pion semileptonic decays, obtained from simulations with two flavors of dynamical twisted-mass fermions and pion...
Status of the Unitarity Triangle Analysis (2009)
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
We present an update of the Unitarity Triangle (UT) analysis, within the Standard Model (SM) and beyond. Within the SM the main novelties are the inclusion in epsilon_K of the contributions of xi and...
A proposal for B-physics on current lattices (2009)
Blossier, B., Dimopoulos, P., Frezzotti, R., Herdoiza, G., Jansen, K., Lubicz, V., ...
A method to extract B-physics parameters (b-quark mass and fB, fBs decay constants) from currently available lattice data is presented and tested. The approach is based on the idea of constructing...
An Improved Standard Model Prediction Of BR(B -> tau nu) And Its Implications For New Physics (2009)
Bona, UTfit Collaboration: M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The recently measured B -> tau nu branching ratio allows to test the Standard Model by probing virtual effects of new heavy particles, such as a charged Higgs boson. The accuracy of the test is...
Flavor Physics in the Quark Sector (2009)
Antonelli, M, Asner, D M, Bauer, D, Becher, T, Beneke, M, Bevan, A J, ...
In the past decade, one of the major challenges of particle physics has been to gain an in-depth understanding of the role of quark flavor.In this time frame, measurements and the theoretical...
Flavor Physics in the Quark Sector (2009)
Antonelli, M., Asner, D. M., Bauer, D., Becher, T., Beneke, M., Bevan, A. J., ...
In the past decade, one of the major challenges of particle physics has been to gain an in-depth understanding of the role of quark flavor.In this time frame, measurements and the theoretical...
Constantinou, M., Lubicz, V., Panagopoulos, H., Stylianou, F.
We calculate corrections to the fermion propagator and to the Green's functions of all fermion bilinear operators of the form $\bar\Psi \Gamma \Psi$, to one-loop in perturbation theory. We employ the...
K -> pion Semileptonic Form Factors from Two-Flavor Lattice QCD (2009)
Lubicz, V., Mescia, F., Simula, S., Tarantino, C., Collaboration, For The ETM
We present new lattice results of the K -> pion semileptonic form factors obtained from simulations with two flavors of dynamical twisted-mass fermions, using pion masses as light as 260 MeV. Our...
New Physics from Flavour (2009)
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The UT{\it{fit}} Collaboration has produced several analyses in the context of flavour physics both within and beyond the Standard Model. In this paper we present updated results for the Standard...
Pseudoscalar decay constants of kaon and D-mesons from Nf=2 twisted mass Lattice QCD (2009)
Blossier, B., Dimopoulos, P., Frezzotti, R., Haas, B., Herdoiza, G., Jansen, K., ...
We present the results of a lattice QCD calculation of the pseudoscalar meson decay constants fpi, fK, fD and fDs, performed with Nf=2 dynamical fermions. The simulation is carried out with the...
Electromagnetic form factor of the pion from twisted-mass lattice QCD at Nf=2 (2008)
Frezzotti, R., Lubicz, V., Simula, S.
We present a lattice calculation of the electromagnetic form factor of the pion obtained using the tree-level Symanzik improved gauge action with two flavors of dynamical twisted Wilson quarks. The...
Buchalla, G., Komatsubara, T. K., Muheim, F., Silvestrini, L., Artuso, M., Asner, D. M., ...
The present report documents the results of Working Group 2: B, D and K decays, of the workshop on Flavor in the Era of the LHC, held at CERN from November 2005 through March 2007. With the advent of...
Pseudoscalar meson decay constants f_K, f_D and f_Ds, from Nf=2 twisted mass Lattice QCD (2008)
Blossier, B., Lubicz, V., Simula, S., Tarantino, C.
We present the results of a lattice QCD calculation of the pseudoscalar meson decay constants f_K, f_D and f_Ds, performed with N_f=2 dynamical fermions. The simulation is carried out with the...
K-meson vector and tensor decay constants and BK-parameter from Nf=2 tmQCD (2008)
Dimopoulos, P., Frezzotti, R., Gimenez, V., Lubicz, V., Mescia, F., Rossi, G. C., ...
We present work in progress on the computation of the K-meson vector and tensor decay constants, as well as the B-parameter in Kaon oscillations. Our simulations are performed in a partially quenched...
First Evidence of New Physics in b s Transitions (2008)
Bona, UTfit Collaboration: M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
We combine all the available experimental information on Bs mixing, including the very recent tagged analyses of Bs to J/Psi phi by the CDF and D0 collaborations. We find that the phase of the Bs...
Dynamical Twisted Mass Fermions with Light Quarks: Simulation and Analysis Details (2008)
Boucaud, Ph., Dimopoulos, P., Farchioni, F., Frezzotti, R., Gimenez, V., Herdoiza, G., ...
In a recent paper [hep-lat/0701012] we presented precise lattice QCD results of our European Twisted Mass Collaboration (ETMC). They were obtained by employing two mass-degenerate flavours of twisted...
Buchalla, G., Komatsubara, T. K., Muheim, F., Silvestrini, L., Artuso, M., Asner, D. M., ...
With the advent of the LHC, we will be able to probe New Physics (NP) up to energy scales almost one order of magnitude larger than it has been possible with present accelerator facilities. While...
Dynamical Twisted Mass Fermions with Light Quarks: Simulation and Analysis Details (2008)
P. Boucauda, P. Dimopoulosb, F. Farchionic, R. Frezzottib, V. Gimenezd, ...
Journal article
M. Ciuchini, E. Franco, V. Lubicz, G. Martinelli, F. Parodi, P. Roudeau
and A. Stocchi (d) (a)
Dimopoulos, P., Frezzotti, R., Herdoiza, G., Lubicz, V., Papinutto, M., Simula, S., ...
We present results for the renormalisation constants of bilinear quark operators, using the Nf=2 twisted mass Wilson action at maximal twist (which guarantees automatic O(a) improvement) and the...
Blossier, B., Boucaud, Ph., Dimopoulos, P., Farchioni, F., Frezzotti, R., Gimenez, V., ...
We present the results of a lattice QCD calculation of the average up-down and strange quark masses and of the light meson pseudoscalar decay constants with Nf=2 dynamical fermions. The simulation is...
D-(D)over-bar mixing and new physics: General considerations and constraints on the MSSM (2007)
Ciuchini, M., Franco, E., Guadagnoli, D., Lubicz, V., Pierini, M., Porretti, Valentina, ...
5 pages, 3 figures.-- ISI Article Identifier: 000251016300011.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0703204
Model-independent constraints on Delta F=2 operators and the scale of New Physics (2007)
Bona, UTfit Collaboration: M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
We update the constraints on new-physics contributions to Delta F=2 processes from the generalized unitarity triangle analysis, including the most recent experimental developments. Based on these...
Improved Determination of the CKM Angle $\alpha$ from $B \to \pi\pi$ decays (2007)
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
Motivated by a recent paper that compares the results of the analysis of the CKM angle alpha in the frequentist and in the Bayesian approaches, we have reconsidered the information on the hadronic...
Dynamical twisted mass fermions with light quarks (2007)
Boucaud, Ph., Dimopoulos, P., Farchioni, F., Frezzotti, R., Giménez Gómez, Vicente, Herdoiza, G., ...
8 pages, 3 figures.-- ISI Article Identifier: 000248138100016.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-lat/0701012
D-Dbar mixing and new physics: general considerations and constraints on the MSSM (2007)
Ciuchini, M., Franco, E., Guadagnoli, D., Lubicz, V., Pierini, M., Porretti, V., ...
Combining the recently available experimental evidence of D-Dbar mixing, we extract model-independent information on the mixing amplitude and on its CP-violating phase. Using this information, we...
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The recent measurements of the B_s meson mixing amplitude by CDF and of the leptonic branching fraction BR(B to tau nu) by Belle call for an upgraded analysis of the Unitarity Triangle in the...
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
Starting from a (new physics independent) tree level determination of rhobar and etabar, we perform the Unitarity Triangle analysis in general extensions of the Standard Model with arbitrary new...
Dynamical Twisted Mass Fermions with Light Quarks (2007)
Boucaud, Ph., Dimopoulos, P., Farchioni, F., Frezzotti, R., Gimenez, V., Herdoiza, G., ...
We present results of dynamical simulations with 2 flavours of degenerate Wilson twisted mass quarks at maximal twist in the range of pseudo scalar masses from 300 to 550 MeV. The simulations are...
Improved Determination of the CKM Angle alpha from B to pi pi decays (2007)
Bona, UTfit Collaboration: M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
Motivated by a recent paper that compares the results of the analysis of the CKM angle alpha in the frequentist and in the Bayesian approaches, we have reconsidered the information on the hadronic...
Dynamical Twisted Mass Fermions with Light Quarks (2007)
Boucaud, Ph., Dimopoulos, P., Farchioni, F., Frezzotti, R., Gimenez, V., Herdoiza, G., ...
We present results of dynamical simulations with 2 flavours of degenerate Wilson twisted mass quarks at maximal twist in the range of pseudo scalar masses from 300 to 550 MeV. The simulations are...
Status of the Cabibbo-Kobayashi-Maskawa matrix and Unitarity Triangle fits (2007)
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The status of the Unitarity Triangle analysis realized by the UTfit Collaboration is presented. The most recent determinations of theoretical and experimental parameters are used in order to...
Status of the Cabibbo-Kobayashi-Maskawa matrix and Unitarity Triangle fits (2007)
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The status of the Unitarity Triangle analysis realized by the UTfit Collaboration is presented. The most recent determinations of theoretical and experimental parameters are used in order to...
Status of the Cabibbo-Kobayashi-Maskawa matrix and Unitarity Triangle fits (2007)
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The status of the Unitarity Triangle analysis realized by the UTfit Collaboration is presented. The most recent determinations of theoretical and experimental parameters are used in order to...
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
Using the latest determinations of several theoretical and experimental parameters, we update the Unitarity Triangle analysis in the Standard Model. The basic experimental constraints come from the...
Constraints on New Physics from the Quark Mixing Unitarity Triangle (2006)
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The status of the unitary triangle beyond the standard model including the most recent results on Delta_ms on dilepton asymmetries and on width differences is presented. Even allowing for general new...
Shape of the Isgur-Wise function (2006)
Abada, A, Becirevic, D, Boucaud, P, Leroy, J P, Lubicz, V, Martinetti, G, ...
Quark Masses from Lattice QCD at the next-to-leading order (2006)
Allton, C R, Ciuchini, M, Crisafulli, M, Franco, E, Lubicz, V, Martinelli, G
Heavy --> Light semileptonic decays of pseudoscalar mesons from lattice QCD (2006)
Abada, A., Becirevic, D., Boucaud, Ph., Leroy, J. P., Lubicz, V., Mescia, F.
We have computed the form factors for B --> pi and D --> K(pi) semileptonic decays on the lattice by using full non-perturbative O(a) improvement, in the quenched approximation. Our results are...
Ciuchini, M., Franco, E., Guadagnoli, D., Lubicz, V., Porretti, V., Silvestrini, L.
We compute the next-to-leading order strong interaction corrections to gluino-mediated Delta F=2 box diagrams in the Minimal Supersymmetric Standard Model. These corrections are given by two loop...
Guadagnoli, D., Lubicz, V., Papinutto, M., Simula, S.
We present the first quenched lattice QCD study of the form factors relevant for the hyperon semileptonic decay Sigma -> n l nu. The momentum dependence of both axial and vector form factors is...
Bona, UTfit Collaboration: M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The recent measurements of the B_s meson mixing amplitude by CDF and of the leptonic branching fraction BR(B to tau nu) by Belle call for an upgraded analysis of the Unitarity Triangle in the...
Constraints on new physics from the quark mixing unitarity triangle (2006)
Bona, UTfit Collaboration: M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The status of the Unitarity Triangle beyond the Standard Model including the most recent results on Delta m_s, on dilepton asymmetries and on width differences is presented. Even allowing for general...
Exploring twisted mass Lattice QCD with the Clover term (2006)
Becirevic, D., Boucaud, Ph., Lubicz, V., Martinelli, G., Mescia, F., Simula, S., ...
It has been shown that in the twisted mass formulation of Lattice QCD at maximal twist large cutoff effects are generated when the quark mass becomes of O(a Lambda_QCD^2). In general, these effects...
Exploring twisted mass Lattice QCD with the Clover term (2006)
Becirevic, D., Boucaud, Ph., Lubicz, V., Martinelli, G., Mescia, F., Simula, S., ...
It has been shown that in the twisted mass formulation of Lattice QCD at maximal twist large cutoff effects are generated when the quark mass becomes of O(a Lambda_QCD^2). In general, these effects...
Exploring twisted mass Lattice QCD with the Clover term (2006)
Becirevic, D., Boucaud, Ph., Lubicz, V., Martinelli, G., Mescia, F., Simula, S., ...
It has been shown that in the twisted mass formulation of Lattice QCD at maximal twist large cutoff effects are generated when the quark mass becomes of O(a Lambda_QCD^2). In general, these effects...
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The status of the Unitarity Triangle beyond the Standard Model including the most recent results on Delta m_s, on dilepton asymmetries and on width differences obtained at the B factories and at the...
Bona, M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
The status of the Unitarity Triangle beyond the Standard Model including the most recent results on Delta m_s, on dilepton asymmetries and on width differences obtained at the B factories and at the...
Exploring twisted mass Lattice QCD with the Clover term (2006)
Becirevic, D., Boucaud, Ph., Lubicz, V., Martinelli, G., Mescia, F., Simula, S., ...
It has been shown that in the twisted mass formulation of Lattice QCD at maximal twist large cutoff effects are generated when the quark mass becomes of O(a Lambda_QCD^2). In general, these effects...
Dynamical Twisted Mass Fermions with Light Quarks. (2006)
Ph. Boucaud, DESY Forschung Hochenergiephysik, P. Dimopoulos, F. Farchioni, R. Frezzotti, V. Gimenez, ...
Internal report | Preprint
Ciuchini, M., Franco, E., Guadagnoli, D., Lubicz, V., Porretti, V., Silvestrini, L.
We present the NLO corrections to the Wilson coefficients of the Delta F = 2 Hamiltonians in the strong interacting sector of the MSSM, responsible for neutral meson oscillations. Such corrections,...
Status of the Cabibbo Angle (2005)
Blucher, E., De Lucia, E., Isidori, G., Lubicz, V., Abele, H., Cirigliano, V., ...
We review the recent experimental and theoretical progress in the determination of |V_{ud}| and |V_{us}|, and the status of the most stringent test of CKM unitarity. Future prospects on |V_{cd}| and...
Non-perturbatively Renormalized Light Quark Masses with Two Dynamical Fermions (2005)
Becirevic, D., Blossier, B., Boucaud, Ph., Gimenez, V., Lubicz, V., Mescia, F., ...
We present the results of a partially quenched lattice QCD calculation of light quark masses with $N_f=2$ degenerate dynamical flavors. Numerical simulations are carried out using the plaquette gauge...
Status of the Cabibbo angle (2005)
Blucher, E., De Lucia, E., Isidori, G., Lubicz, V., Abele, H., Cirigliano, V., ...
We review the recent experimental and theoretical progress in the determination of |Vud| and |Vus|, and the status of the most stringent test of CKM unitarity. Future prospects on |Vcd| and |Vcs| are...
Kaon B-parameter with NF=2 dynamical Wilson fermions (2005)
Mescia, F., Gimenez, V., Lubicz, V., Martinelli, G., Simula, S., Tarantino, C.
We present a preliminary study of the neutral kaon mixing bag parameter BK using two flavors of dynamical Wilson fermions. We determine the matrix element of the relevant DeltaS=2 operator by using...
Operator product expansion and quark condensate from LQCD in coordinate space (2005)
Gimenez, V., Lubicz, V., Mescia, F., Porretti, V., Reyes, J.
We perform an exploratory study of the operator product expansion of the quark propagator on the lattice at short distance in coordinate space. This permits a simple determination of the quark...
Non-perturbatively renormalised light quark masses from a lattice simulation with N_f=2 (2005)
Becirevic, D., Blossier, B., Boucaud, Ph., Gimenez, V., Lubicz, V., Mescia, F., ...
We present results for the light quark masses obtained from a lattice QCD simulation with N_f=2 degenerate Wilson dynamical quark flavours. The sea quark masses of our lattice, of spacing a ~ 0.06...
Non-perturbatively Renormalized Light Quark Masses with Two Dynamical Fermions (2005)
Becirevic, D., Blossier, B., Boucaud, Ph., Gimenez, V., Lubicz, V., Mescia, F., ...
We present the results of a partially quenched lattice QCD calculation of light quark masses with $N_f=2$ degenerate dynamical flavors. Numerical simulations are carried out using the plaquette gauge...
Bona, UTfit Collaboration: M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
Starting from a (new physics independent) tree level determination of rhobar and etabar, we perform the Unitarity Triangle analysis in general extensions of the Standard Model with arbitrary new...
Chiral extrapolation of hyperon vector form factors (2005)
Guadagnoli, D., Lubicz, V., Martinelli, G., Papinutto, M., Simula, S., Villadoro, G.
We present a new study of SU(3)-breaking corrections in hyperon vector form factors relevant for the extraction of Vus. A lattice quenched simulation has been performed, showing that it is possible...
Operator product expansion and quark condensate from Lattice QCD in coordinate space (2005)
Gimenez, V., Lubicz, V., Mescia, F., Porretti, V., Reyes, J.
We present a Lattice QCD determination of the chiral quark condensate based on a new method. We extract the quark condensate from the operator product expansion of the quark propagator at short...
Bona, UTfit Collaboration: M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
Using the latest determinations of several theoretical and experimental parameters, we update the Unitarity Triangle analysis in the Standard Model. The basic experimental constraints come from the...
Non-perturbatively Renormalized Light Quark Masses with Two Dynamical Fermions (2005)
Becirevic, D., Blossier, B., Boucaud, Ph., Gimenez, V., Lubicz, V., Mescia, F., ...
We present the results of a partially quenched lattice QCD calculation of light quark masses with $N_f=2$ degenerate dynamical flavors. Numerical simulations are carried out using the plaquette gauge...
Non-perturbatively Renormalized Light Quark Masses with Two Dynamical Fermions (2005)
Becirevic, D., Blossier, B., Boucaud, Ph., Gimenez, V., Lubicz, V., Mescia, F., ...
We present the results of a partially quenched lattice QCD calculation of light quark masses with $N_f=2$ degenerate dynamical flavors. Numerical simulations are carried out using the plaquette gauge...
Boucaud, P., Gimenez, V., Lin, C-J. D., Lubicz, V., Martinelli, G., Papinutto, M., ...
We present the first direct evaluation of DI = 3/2 K -> pi pi matrix elements with the aim of determining all the low-energy constants at NLO in the chiral expansion. Our numerical investigation...
SU(3)-breaking effects in kaon and hyperon semileptonic decays from lattice QCD (2004)
Becirevic, D., Guadagnoli, D., Isidori, G., Lubicz, V., Martinelli, G., Mescia, F., ...
We discuss the result of a recent quenched lattice calculation of the K -> pi vector form factor at zero-momentum transfer, relevant for the determination of |V_us| from K-> pi l nu decays. Using...
The role of Lattice QCD in flavor physics (2004)
Understanding flavor physics is one of the most important tasks of particle physics today, which is motivating an extraordinary experimental and theoretical investigational effort. Important progress...
Becirevic, D., Boucaud, P., Gimenez, V., Lubicz, V., Martinelli, G., Mescia, F., ...
The results of a preliminary partially quenched (N_f=2) study of the light hadron spectrum, renormalization constants and light quark masses are presented. Numerical simulations are carried out with...
CKM-Triangle analysis: Updates and Novelties for Summer 2004 (2004)
Bona, UTfit Collaboration: M., Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
Using the most recent determinations of several theoretical and experimental parameters, we update the Unitarity Triangle analysis in the Standard Model. The basic experimental constraints come from...
BK from the lattice with Wilson quarks (2004)
Becirevic, D., Boucaud, Ph., Gimenez, V., Lubicz, V., Papinutto, M.
We report our results for the bag-parameter BK obtained from the quenched simulations on the lattice with Wilson fermions at three values of the lattice spacing. We implemented the method by which no...
Non-perturbative renormalization of lattice operators in coordinate space (2004)
Gimenez, V., Giusti, L., Guerriero, S., Lubicz, V., Martinelli, G., Petrarca, S., ...
We present the first numerical implementation of a non-perturbative renormalization method for lattice operators, based on the study of correlation functions in coordinate space at short Euclidean...
The K -> pi vector form factor at zero momentum transfer on the lattice (2004)
Becirevic, D., Isidori, G., Lubicz, V., Martinelli, G., Mescia, F., Simula, S., ...
We present a quenched lattice study of the form factors $f_+(q^2)$ and $f_0(q^2)$ of the matrix elements $$. We focus on the second-order SU(3)-breaking quantity $[1 - f_+(0)]$, which is necessary to...
Matrix elements of Delta(I) = 3/2 K -> pi pi decays (2004)
Boucaud, Ph., Giménez, V., Lin, C.-J.D., Lubicz, V., Martinelli, G., Papinutto, M., ...
We present a numerical computation of matrix elements of ΔI = 3/2 K → ππ decays by using Wilson fermions. In order to extrapolate to the physical point we work at unphysical kinematics and we...
Becirevic, D., Gimenez, V., Lubicz, V., Martinelli, G., Papinutto, M., Reyes, J.
We present the results of an extensive lattice calculation of the renormalization constants of bilinear and four-quark operators for the non-perturbatively O(a)-improved Wilson action. The results...
Non perturbative renormalization in coordinate space (2003)
Gimenez, V., Giusti, L., Guerriero, S., Lubicz, V., Martinelli, G., Petrarca, S., ...
We present an exploratory study of a gauge-invariant non-perturbative renormalization technique. The renormalization conditions are imposed on correlation functions of composite operators in...
Matrix elements of DI=3/2 K-->pi pi decays (2003)
Boucaud, Ph., Gimenez, V., Lin, C. -J. D., Lubicz, V., Martinelli, G., Papinutto, M., ...
We present a numerical computation of matrix elements of DI=3/2 K-->pi pi decays by using Wilson fermions. In order to extrapolate to the physical point we work at unphysical kinematics and we resort...
Ciuchini, M., Franco, E., Lubicz, V., Mescia, F., Tarantino, C.
We compute the next-to-leading order QCD corrections to the off-diagonal elements of the decay-width matrix Gamma entering the neutral B-meson oscillations. From this calculation the width...
Unitarity Triangle Analysis in the Standard Model and Sensitivity to New Physics (2003)
Ciuchini, M., Franco, E., Parodi, F., Lubicz, V., Silvestrini, L., Stocchi, A.
By using the most recent determinations of the several theoretical and experimental input parameters, we update the Unitarity Triangle analysis in the Standard Model and discuss the sensitivity to...
Kaon weak matrix elements with Wilson fermions (2003)
Becirevic, D., Boucaud, Ph., Gime´nez, V., Lin, C.-J.D., Lubicz, V., Martinelli, G., ...
We present results of several numerical studies with Wilson fermions relevant for kaon physics. We compute theBk parameter by using two different methods and extrapolate to the continuum limit. Our...
The CKM Matrix and the Unitarity Triangle (2003)
Battaglia, Marco, Yamanda, N, Willocq, S, Wilkinson, G, Wilden, L H, Weiser, C, ...
This report contains the results of the Workshop on the CKM Unitarity Triangle, held at CERN on 13-16 February 2002 to study the determination of the CKM matrix from the available data of K, D, and B...
Heavy to light vector meson semileptonic decays (2003)
Abada, A., Becirevic, D., Boucaud, P., Flynn, J.M., Leroy, J.P., Lubicz, V., ...
New (preliminary) results for the form factors relevant for the semileptonic decays of heavy pseudoscalar to a light vector meson are presented. In particular, we discuss the form factors forD → K*...
CKM elements from tree-level B decays and lifetimes (2003)
Artuso, M., Battaglia, M., Bauer, C., Becirevic, D., Beneke, M., Bigi, I., ...
CKM elements from tree-level B decays and lifetimes (2003)
Artuso, M., Battaglia, M., Bauer, C., Becirevic, D., Beneke, M., Bigi, I., ...
Neutron Electric Dipole Moment on the Lattice: a Theoretical Reappraisal (2002)
Guadagnoli, D., Lubicz, V., Martinelli, G., Simula, S.
We present a strategy for a lattice evaluation of the neutron electric dipole moment induced by the strong CP violating term of the QCD Lagrangian. Our strategy is based on the standard definition of...
Non-perturbative renormalization constants and light quark masses (2002)
Becirevic, D., Gimenez, V., Lubicz, V., Martinelli, G., Papinutto, M., Reyes, J., ...
We present the results of an extensive non-perturbative calculation of the renormalization constants of bilinear quark operators for the non-perturbatively O(a)-improved Wilson action. The results...
Kaon Weak Matrix Elements with Wilson Fermions (2002)
Becirevic, D., Boucaud, Ph., Gimenez, V., Lin, C. -J. D., Lubicz, V., Martinelli, G., ...
We present results of several numerical studies with Wilson fermions relevant for kaon physics. We compute the B_K parameter by using two different methods and extrapolate to the continuum limit. Our...
Becirevic, D., Gimenez, V., Lubicz, V., Martinelli, G., Papinutto, M., Reyes, J.
We present new results for the renormalisation and subtraction constants for the four fermion Delta F=2 operators, computed non-perturbatively in the RI-MOM scheme (in the Landau gauge). From our...
Heavy to light vector meson semileptonic decays (2002)
Abada, A., Becirevic, D., Boucaud, Ph., Flynn, J. M., Leroy, J. P., Lubicz, V., ...
New (preliminary) results for the form factors relevant for the semileptonic decays of heavy pseudoscalar to a light vector meson are presented. In particular, we discuss the form factors for D -->...
Lifetime Ratios of Beauty Hadrons at the Next-to-Leading Order in QCD (2002)
Franco, E., Lubicz, V., Mescia, F., Tarantino, C.
We compute the next-to-leading order QCD corrections to spectator effects in the lifetime ratios of beauty hadrons. With respect to previous calculations, we take into account the non vanishing value...
Extraction of K -> pi pi matrix elements with Wilson fermions (2002)
Boucaud, P., Giménez, V., Lin, C.-J.D., Lubicz, V., Martinelli, G., Papinutto, M., ...
We present the status of a lattice calculation for the K → ππ matrix elements of the ΔS = 1 effective weak Hamiltonian, directly with two pion in the final state. We study the energy shift of...
K -> pi pi matrix elements beyond the leading-order chiral expansion (2002)
Boucaud, Ph., Giménez, V., Lin, C.-J.D., Lubicz, V., Martinelli, G., Papinutto, M., ...
We propose an approach for calculating K → ππ decays to the next-to-leading order in chiral expansion. A detailed numerical study of this approach is being performed.
Next-to-Leading Order QCD Corrections to Spectator Effects in Lifetimes of Beauty Hadrons (2001)
Ciuchini, M., Franco, E., Lubicz, V., Mescia, F.
Theoretical predictions of beauty hadron lifetimes, based on the heavy quark expansion up to and including order 1/mb^2, do not to reproduce the experimental measurements of the lifetime ratios...
$K\to\pi\pi$ matrix elements beyond the leading-order chiral expansion (2001)
Boucaud, Ph., Giménez, V., Lin, C. -J. D., Lubicz, V., Martinelli, G., Papinutto, M., ...
We propose an approach for calculating $K\to\pi\pi$ decays to the next-to-leading order in chiral expansion. A detailed numerical study of this approach is being performed.
Extraction of K-->pipi Matrix Elements with Wilson Fermions (2001)
Boucaud, Ph., Gimenez, V., Lin, C. J. D., Lubicz, V., Martinelli, G., Papinutto, M., ...
We present the status of a lattice calculation for the K-->pipi matrix elements of the (delta S=1) effective weak Hamiltonian, directly with two pion in the final state. We study the energy shift of...
Matrix elements of (delta S=2) operators with Wilson fermions (2001)
Becirevic, D., Boucaud, Ph., Gimenez, V., Lubicz, V., Martinelli, G., Papinutto, M.
We test the recent proposal of using the Ward identities to compute the K0-K0bar mixing amplitude with Wilson fermions, without the problem of spurious lattice subtractions. From our simulations, we...
Heavy --> Light semileptonic decays of pseudoscalar mesons from lattice QCD (2001)
Abada, A., Becirevic, D., Boucaud, Ph., Leroy, J. P., Lubicz, V., Mescia, F.
We have computed the form factors for B --> pi and D --> K(pi) semileptonic decays on the lattice by using full non-perturbative O(a) improvement, in the quenched approximation. Our results are...
Heavy --> Light semileptonic decays of pseudoscalar mesons from lattice QCD (2001)
Abada, A., Becirevic, D., Boucaud, Ph., Leroy, J. P., Lubicz, V., Mescia, F.
We have computed the form factors for B --> pi and D --> K(pi) semileptonic decays on the lattice by using full non-perturbative O(a) improvement, in the quenched approximation. Our results are...
Ciuchini, M., D'Agostini, G., Franco, E., Lubicz, V., Martinelli, G., Parodi, F., ...
Within the Standard Model, a review of the current determination of the sides and angles of the CKM unitarity triangle is presented, using experimental constraints from the measurements of...
Quark Masses on the Lattice: Light and Heavy (2000)
I review the current status of lattice calculations of light and heavy quark masses. Significant progresses, in these studies, have been allowed by the introduction of improved actions and...
Heavy $\to$ Light semileptonic decays of pseudoscalar mesons from lattice QCD (2000)
Abada, A, Becirevic, D, Boucaud, P, Leroy, J P, Lubicz, V, Mescia, F
We have computed the form factors for B->pi and D->K(pi) semileptonic decays on the lattice by using full non-perturbative O(a) improvement, in the quenched approximation. Our results are expressed...
Heavy --> Light semileptonic decays of pseudoscalar mesons from lattice QCD (2000)
Abada, A., Becirevic, D., Boucaud, Ph., Leroy, J. P., Lubicz, V., Mescia, F.
We have computed the form factors for B --> pi and D --> K(pi) semileptonic decays on the lattice by using full non-perturbative O(a) improvement, in the quenched approximation. Our results are...
First Lattice Calculation of the Electromagnetic Operator Amplitude (2000)
Becirevic, D., Lubicz, V., Martinelli, G., Mescia, F.
We present the first lattice calculation of the matrix element of the electromagnetic operator , where Q+ = (Q_d e/16 pi^2)* (\bar s_L sigma{mu,nu} F{mu,nu} d_R + \bar s_R sigma{mu,nu} F{mu,nu} d_L)....
Phenomenology of the Standard Model from Lattice QCD (2000)
Some recent results of lattice QCD calculations which are relevant for the phenomenology of the Standard Model are reviewed. They concern the lattice determinations of quark masses, studies of K-Kbar...
The $t \to WZb$ decay in the Standard Model: A Critical Reanalysis (2000)
Altarelli, Guido, Conti, L, Lubicz, V
We compute the t->WZb decay rate, in the Standard Model, at the leading order in perturbation theory, with special attention to the effects of the finite widths of the W and Z bosons. These effects...
The t->WZb decay in the Standard Model: A Critical Reanalysis (2000)
Altarelli, G., Conti, L., Lubicz, V.
We compute the t->WZb decay rate, in the Standard Model, at the leading order in perturbation theory, with special attention to the effects of the finite widths of the W and Z bosons. These effects...
A Theoretical Prediction of the Bs-Meson Lifetime Difference (2000)
Becirevic, D., Meloni, D., Retico, A., Gimenez, V., Lubicz, V., Martinelli, G.
We present the results of a quenched lattice calculation of the operator matrix elements relevant for predicting the Bs width difference. Our main result is (\Delta\Gamma_Bs/\Gamma_Bs)= (4.7 +/- 1.5...
K0-K0bar Mixing with Wilson Fermions without Subtractions (2000)
Becirevic, D., Boucaud, Ph., Gimenez, V., Lubicz, V., Martinelli, G., Micheli, J., ...
By using suitable Ward identities, we show that it is possible to compute K0-K0bar mixing without subtracting the terms generated by explicit chiral symmetry breaking present in Wilson-like lattice...
Mixing of B mesons and Decay Constants with the Non-Perturbatively Improved Action (2000)
Becirevic, D., Meloni, D., Retico, A., Gimenez, V., Giusti, L., Lubicz, V., ...
Several quantities relevant to phenomenological studies of the mixing of neutral B mesons are computed on the lattice. Our main results are: f_{Bd} sqrt(B_{Bd})=206(28)(7) MeV, f_{Bs}...
Abada, A., Becirevic, D., Boucaud, Ph., Leroy, J. P., Lubicz, V., Martinelli, G., ...
We present preliminary results for heavy to light transitions of pseudoscalar mesons, induced by the vector and tensor operators. This lattice study is performed in quenched approximation, by using...
Combined analysis of the unitarity triangle and CP violation in the Standard Model (1999)
Ciuchini, M., Franco, E., Giusti, L., Lubicz, V., Martinelli, G.
We perform a combined analysis of the unitarity triangle and of the CP violating parameter epsilon'/epsilon using the most recent determination of the relevant experimental data and, whenever...
Epsilon'/epsilon from Lattice QCD (1999)
Ciuchini, M., Franco, E., Giusti, L., Lubicz, V., Martinelli, G.
Lattice calculations of matrix elements relevant for kaon decays, and in particular for epsilon'/epsilon, are reviewed. The role of the strange quark mass is also discussed. A comparison with other...
Quark Masses and Renormalization Constants from Quark Propagator and 3-point Functions (1999)
Becirevic, D., Lubicz, V., Martinelli, G., Testa, M.
We have computed the light and strange quark masses and the renormalization constants of the quark bilinear operators, by studying the large-p^2 behaviour of the lattice quark propagator and 3-point...
Non-perturbatively Improved Heavy-Light Mesons: Masses and Decay Constants (1998)
Becirevic, D., Boucaud, Ph., Leroy, J. P., Lubicz, V., Martinelli, G., Mescia, F., ...
We present a study of the heavy-light spectrum and of the D- and B-meson decay constants. The results wer e obtained in the quenched approximation, by using the non-perturbatively improved Clover...
New results from APE with non-perturbatively improved Wilson fermions (1998)
Becirevic, D, Boucaud, P, Giusti, Leonardo, Leroy, J P, Lubicz, V, Martinelli, G, ...
We present the results for light hadron spectrum, decay constants and the quark masses obtained with non-perturbatively improved Wilson fermions. We also give our preliminary results for the...
New results from APE with non-perturbatively improved Wilson fermions (1998)
Becirevic, D., Boucaud, Ph., Giusti, L., Leroy, J. P., Lubicz, V., Martinelli, G., ...
We present the results for light hadron spectrum, decay constants and the quark masses obtained with non-perturbatively improved Wilson fermions. We also give our preliminary results for the...
Light hadron spectroscopy on the lattice with the non-perturbatively improved Wilson action (1998)
Becirevic, D., Boucaud, Ph., Giusti, L., Leroy, J. P., Lubicz, V., Martinelli, G., ...
We present results for the light meson masses and decay constants as obtained from calculations with the non-perturbatively improved (`Alpha') action and operators on a 24^3 \times 64 lattice at beta...
Delta M_K and epsilon_K in SUSY at the Next-to-Leading order (1998)
Ciuchini, M., Conti, L., Donini, A., Franco, E., Gimenez, V., Giusti, L., ...
We perform a Next-to-Leading order analysis of Delta S=2 processes beyond the Standard Model. Combining the recently computed NLO anomalous dimensions and the B parameters of the most general Delta...
Non-perturbatively Renormalized Light-Quark Masses with the Alpha Action (1998)
Becirevic, D., Boucaud, Ph., Leroy, J. P., Lubicz, V., Martinelli, G., Mescia, F.
We have computed the light quark masses using the O(a^2) improved Alpha action, in the quenched approximation. The renormalized masses have been obtained non-perturbatively. By eliminating the...
Quark Mass Renormalization in the $\MSbar$ and RI schemes up to the NNLO order (1998)
We compute the relation between the quark mass defined in the minimal modified $\MSbar$ scheme and the mass defined in the ``Regularization Invariant" scheme (RI), up to the NNLO order. The RI scheme...
Light hadron spectroscopy on the lattice with the non-perturbatively improved Wilson action (1998)
D. Becirevic, Ph. Boucaud, L. Giusti, J. P. Leroy, V. Lubicz, G. Martinelli, ...
: We present results for the light meson masses and decay constants as obtained from calculations with the non-perturbatively improved (`Alpha') action and operators on a 24 3 \Theta 64 lattice...
Next-to-Leading Order QCD Corrections to $\Delta F =2$ effective Hamiltonians (1997)
Ciuchini, M., Franco, E., Lubicz, V., Martinelli, G., Scimemi, I., Silvestrini, L.
The most general QCD next-to-leading anomalous-dimension matrix of all possible four-fermion, dimension-six $\Delta F=2$ operators is computed. The results of this calculation can be used in many...
Improved Renormalization of Lattice Operators: A Critical Reappraisal (1997)
Crisafulli, M, Lubicz, V, Vladikas, A
We systematically examine various proposals which aim at increasing the accuracy in the determination of the renormalization of two-fermion lattice operators. We concentrate on three finite...
Improved Renormalization of Lattice Operators: A Critical Reappraisal (1997)
Crisafulli, M., Lubicz, V., Vladikas, A.
We systematically examine various proposals which aim at increasing the accuracy in the determination of the renormalization of two-fermion lattice operators. We concentrate on three finite...
Determinations of Standard Model Parameters from Lattice QCD (1997)
In this talk I review some recent results from lattice QCD calculations which aim to a more accurate determination of the Standard Model parameters in the quark sector. After a review of our current...
QCDF90: Lattice QCD with Fortran 90 (1996)
Dasgupta, I., Levi, A. R., Lubicz, V., Rebbi, C.
We have used Fortran 90 to implement lattice QCD. We have designed a set of machine independent modules that define fields (gauge, fermions, scalars, etc...) and overloaded operators for all possible...
The Taming of QCD by Fortran 90 (1996)
Dasgupta, I., Levi, A. R., Lubicz, V., Rebbi, C.
We implement lattice QCD using the Fortran 90 language. We have designed machine independent modules that define fields (gauge, fermions, scalars, etc...) and have defined overloaded operators for...
Towards a lattice calculation of the coefficients of the QCD chiral Lagrangian (1996)
Levi, A. R., Lubicz, V., Rebbi, C.
We discuss a general strategy to compute the coefficients of QCD chiral Lagrangian by using the lattice regularization of QCD with Wilson fermions. This procedure requires the introduction of an...
Levi, A. R., Lubicz, V., Rebbi, C.
We discuss a general strategy to compute the coefficients of the QCD chiral Lagrangian using lattice QCD with Wilson fermions. This procedure requires the introduction of a lattice chiral Lagrangian...
Dasgupta, I., Levi, A. R., Lubicz, V., Rebbi, C.
We present a complete set of Fortran 90 modules that can be used to write very compact, efficient, and high level QCD programs. The modules define fields (gauge, fermi, generators, complex, and real...
Crisafulli, M, Donini, Andrea, Lubicz, V, Martinelli, G, Rapuano, F, Talevi, M, ...
We present results for the kaon B-parameter B_K from a sample of 200 configurations using the Wilson action and 460 configurations using the SW-Clover action, on a 18^3 \times 64 lattice at...
Crisafulli, M., Donini, A., Lubicz, V., Rapuano, G. Martinelli F., Talevi, M., Ungarelli, C., ...
We present results for the kaon $B$-parameter $B_K$ from a sample of $200$ configurations using the Wilson action and $460$ configurations using the SW-Clover action, on a $18^3 \times 64$ lattice at...
Quenched $B_K$-parameter with the Wilson and Clover actions at $\beta = 6.0$ (1995)
Crisafulli, M., Donini, A., Lubicz, V., Martinelli, G., Rapuano, F., Ungarelli, C., ...
We present results for the Kaon $B$ parameter from a sample of $200$ configurations using the Wilson action and $460$ configurations using the Clover action, on a $18^3 \times 64$ lattice at...
Abada, A, Boucaud, P, Cabibbo, Nicola, Crisafulli, M, Leroy, J P, Lubicz, V, ...
We present the results of a numerical calculation of the B\rightarrow K^* \gamma form factors. The results have been obtained by studying the relevant correlation functions at \beta=6.0, on an 18^3...
Dependence of the current renormalisation constants on the quark mass (1995)
Crisafulli, M, Lubicz, V, Martinelli, G, Vladikas, A
We study the behaviour of the vector and axial current renormalisation constants Z_V and Z_A as a function of the quark mass, m_q. We show that sizeable O(am_q) and O(g_0^2 a m_q) systematic effects...
DEPENDENCE OF THE CURRENT RENORMALISATION CONSTANTS ON THE QUARK MASS (1995)
Crisafulli, M., Lubicz, V., Martinelli, G., Vladikas, A.
We study the behaviour of the vector and axial current renormalisation constants $Z_V$ and $Z_A$ as a function of the quark mass, $m_q$. We show that sizeable $O(am_q)$ and $O(g_0^2 a m_q)$...
RESULTS FOR THE B-MESON DECAY CONSTANT FROM THE APE COLLABORATION (1995)
Allton, C. R., Crisafulli, M., Lubicz, V., Martinelli, G., Rapuano, F., Salina, G., ...
The decay constant for the B-meson in the static limit is calculated using the Wilson and clover actions at various lattice spacings. We show that both the contamination of our results by excited...
Allton, C R, Crisafulli, M, Lubicz, V, Martinelli, G, Rapuano, F, Stella, N, ...
We present the results of a high statistics lattice calculation of hadronic form factors relevant for $D-$ and $B-$meson semi-leptonic decays into light pseudoscalar and vector mesons. The results...
Allton, C. R., Crisafulli, M., Lubicz, V., Martinelli, G., Rapuano, F., Stella, N., ...
We present the results of a high statistics lattice calculation of hadronic form factors relevant for $D-$ and $B-$meson semi-leptonic decays into light pseudoscalar and vector mesons. The results...
Quark masses from lattice QCD at the next-to-leading order (1994)
Allton, C R, Ciuchini, M, Crisafulli, M, Franco, E, Lubicz, V, Martinelli, G
Using the results of several quenched lattice simulations, we predict the value of the strange and charm quark masses in the continuum at the next-to-leading order, m^{\overline{MS}}_s(\mu=2\,\,...
Quark Masses from Lattice QCD at the Next-to-Leading Order (1994)
Allton, C. R., Ciuchini, M., Crisafulli, M., Franco, E., Lubicz, V., Martinelli, G.
Using the results of several quenched lattice simulations, we predict the value of the strange and charm quark masses in the continuum at the next-to-leading order, $m^{\overline{MS}}_s(\mu=2\,\,...
Allton, C. R., Crisafulli, M., Lubicz, V., Salina, G., Martinelli, G., Vladikas, A., ...
We present a calculation of $f_B$ in the static limit, obtained by numerical simulation of quenched QCD, at $\beta=6.2$ on a $18^3 \times 64$ lattice, using the SW-Clover quark action. The decay...
Semi-leptonic Decays of Heavy Flavours on a Fine Grained Lattice (1993)
Abada, As., Allton, C. R., Boucaud, Ph., Carpenter, D. B., Crisafulli, M., Güsken, S., ...
We present the results of a numerical calculation of semi-leptonic form factors relevant for heavy flavour meson decays into light mesons, at $\beta=6.4$ on a $24^3 \times 60$ lattice, using the...
THE CKM MATRIX AND THE UNITARITY TRIANGLE
Abbaneo,D., Ali,A., Amaral,P., Andreev,V., Artuso,M., Barberio,E., ...
This report contains the results of the Workshop on the CKM Unitarity Triangle, held at CERN on 13-16 February 2002 to study the determination of the CKM matrix from the available data of K, D, and B...
THE CKM MATRIX AND THE UNITARITY TRIANGLE
Abbaneo, D., Ali, A., Amaral, P., Andreev, V., Artuso, M., Barberio, E., ...
This report contains the results of the Workshop on the CKM Unitarity Triangle, held at CERN on 13-16 February 2002 to study the determination of the CKM matrix from the available data of K, D, and B...