Light meson physics from maximally twisted mass lattice QCD (2010)
Baron, R., Boucaud, Ph., Dimopoulos, P., Farchioni, F., Frezzotti, R., Giménez Gómez, Vicente, ...
40 pages, 5 figures, 8 tables, 3 appendix.-- Preprint-No: HISKP-TH-09-37, DESY 09-187, SFB/CPP-09-115, MS-TP-09-27, ROM2F/2009/24, IFT-UAM/CSIC-09-58.-- PACS: 11.15.Ha; 12.38.Gc; 12.39.Fe
ChPT description of the pion mass and decay constant from N_f=2 twisted mass QCD (2009)
Dimopoulos, P., Frezzotti, R., Herdoiza, G., Jansen, K., Michael, C., Urbach, C., ...
We study lattice QCD determinations of the pion mass and decay constant by means of chiral perturbation theory (ChPT). The lattice data are obtained from large scale simulations with N_f=2 flavours...
Scaling and ChPT Description of Pions from N_f=2 twisted mass QCD (2009)
Dimopoulos, P., Frezzotti, R., Herdoiza, G., Jansen, K., Michael, C., Urbach, C., ...
We study light-quark observables by means of dynamical lattice QCD simulations using two flavours of twisted mass fermions at maximal twist. We employ chiral perturbation theory to describe our data...
Muller-Preussker, M., Ilgenfritz, E. -M., Jansen, K., Lombardo, M. P., Philipsen, O., Zeidlewicz, L., ...
In this talk we give an overview of the 3D phase diagram of two-flavour non-zero temperature lattice QCD with twisted-mass Wilson fermions and a tree-level Symanzik-improved gauge action. We present...
First results of ETMC simulations with Nf=2+1+1 maximally twisted mass fermions (2009)
Baron, R., Blossier, B., Boucaud, P., Deuzeman, A., Drach, V., Farchioni, F., ...
We present first results from runs performed with Nf=2+1+1 flavours of dynamical twisted mass fermions at maximal twist: a degenerate light doublet and a mass split heavy doublet. An overview of the...
Light Meson Physics from Maximally Twisted Mass Lattice QCD (2009)
Baron, R., Boucaud, Ph., Dimopoulos, P., Farchioni, F., Frezzotti, R., Gimenez, V., ...
We present a comprehensive investigation of light meson physics using maximally twisted mass fermions for two mass-degenerate quark flavours. By employing four values of the lattice spacing, spatial...
f_B and f_Bs with maximally twisted Wilson fermions (2009)
ETM Collaboration, Blossier, B., Dimopoulos, P., Frezzotti, R., Herdoiza, G., Jansen, K., ...
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...
A lattice QCD calculation of the transverse decay constant of the b1(1235) meson (2009)
Jansen, K., McNeile, C., Michael, C., Urbach, C., Collaboration, For The ETM
We review various B meson decays that require knowledge of the transverse decay constant of the b1(1235) meson. We report on an exploratory lattice QCD calculation of the transverse decay constant of...
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...
W. Bietenholz, S. Capitani, M. Hasenbusch, K. Jansen, M. M "uller-preussker, K. -i. Nagai, ...
Quantum Chromo Dynamics is considered in a setup where the light mesons are squeezed intounphysically small boxes. We show how such a situation can be used to determine the couplings of the low...
Light Mesons in a Small Box (2009)
Unphysical Situation, W. Bietenholz, S. Capitani, M. Hasenbusch, K. Jansen, M. Müller-preussker, ...
published in
O(a^2) cutoff effects in lattice Wilson fermion simulations (2009)
Dimopoulos, P., Frezzotti, R., Michael, C., Rossi, G. C., Urbach, C.
In this paper we propose to interpret the large discretization artifacts affecting the neutral pion mass in maximally twisted lattice QCD simulations as O(a^2) effects whose magnitude is roughly...
Pseudoscalar decay constants of kaon and D-mesons from N-f=2 twisted mass Lattice QCD (2009)
Palao, David, Blossier, B., Dimopoulos, P., Frezzotti, R., Haas, B., Herdoiza, G., ...
We present the results of a lattice QCD calculation of the pseudoscalar meson decay constants fπ, fK, fD and fDs, performed with Nf = 2 dynamical fermions. The simulation is carried out with the...
Meson masses and decay constants from unquenched lattice QCD (2009)
Jansen, K., McNeile, C., Michael, C., Urbach, C., Collaboration, For The ETM
We report results for the masses of the flavour non-singlet light 0++, 1--, and 1+- mesons from unquenched lattice QCD at two lattice spacings. The twisted mass formalism was used with two flavours...
tmLQCD: a program suite to simulate Wilson Twisted mass Lattice QCD (2009)
We discuss a program suite for simulating Quantum Chromodynamics on a 4-dimensional space-time lattice. The basic Hybrid Monte Carlo algorithm is introduced and a number of algorithmic improvements...
Partially quenched study of strange baryon with Nf = 2 twisted mass fermions (2009)
Drach, V., Brinet, M., Carbonell, J., Liu, Z., Alexandrou, C., Korzec, T., ...
We present results on the mass of the baryon octet and decuplet using two flavors of light dynamical twisted mass fermions. The strange quark mass is fixed to its physical value from the kaon sector...
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...
The omega-rho meson mass splitting and mixing from lattice QCD (2009)
McNeile, ETM Collaboration: C., Michael, C., Urbach, C.
We compare flavour singlet and non-singlet vector mesons from first principles using lattice QCD. With N_f=2 flavours of light quark, this addresses the omega-rho mass difference. Using maximally...
Meson masses and decay constants from unquenched lattice QCD (2009)
K. Jansen, DESY DESY Standort Zeuthen, C. McNeile, C. Michael, C. Urbach, ETM Collaboration
Internal report | Preprint
Comparing topological charge definitions using topology fixing actions (2009)
F. Bruckmann, DESY DESY Standort Zeuthen, F. Gruber, K. Jansen, M. Marinkovic, C. Urbach, ...
Internal report | Preprint
A proposal for B-physics on current lattices (2009)
European Twisted Mass Collaboration, DESY DESY Standort Zeuthen, B. Blossier, P. Dimopoulos, R. Frezzotti, G. Herdoiza, ...
Internal report | Preprint
tmLQCD: a program suite to simulate Wilson Twisted mass Lattice QCD (2009)
K. Jansen, DESY DESY Standort Zeuthen, C. Urbach
Internal report | Preprint
P. Dimopoulos, DESY DESY Standort Zeuthen, International Workshop On Effective Field Theories: From The Pion To The Upsilon Valencia EFT09 Spain, R. Frezzotti, G. Herdoiza, K. Jansen, ...
Contribution to a conf. proceeding (book/online)
fB and fBs with maximally twisted Wilson fermions 2009-07-26 - 2009-07-31 (2009)
ETM Collaboration, DESY DESY Standort Zeuthen, 27. International Symposium On Lattice Field Theory Beijing LAT2009 China, B. Blossier, P. Dimopoulos, R. Frezzotti, ...
Contribution to a conf. proceeding (book/online)
R. Baron, DESY DESY Standort Zeuthen, 27. International Symposium On Lattice Field Theory Beijing LAT2009 China, B. Blossier, P. Boucaud, A. Deuzeman, ...
Contribution to a conf. proceeding (book/online)
M. Müller-Preussker, DESY DESY Standort Zeuthen, 27. International Symposium On Lattice Field Theory Beijing LAT2009 China, E.-M. Ilgenfritz, K. Jansen, M.P. Lombardo, ...
Contribution to a conf. proceeding (book/online)
Meson masses and decay constants from unquenched lattice QCD (2009)
K. Jansen, DESY DESY Standort Zeuthen, C. McNeile, C. Michael, C. Urbach
Journal article
Partially quenched study of strange baryon with Nf = 2 twisted mass fermions (2009)
V. Drach, DESY DESY Standort Zeuthen, M. Brinet, J. Carbonell, Z. Liu, C. Alexandrou, ...
Internal report | Preprint
A lattice QCD calculation of the transverse decay constant of the b1(1235) meson (2009)
K. Jansen, DESY DESY Standort Zeuthen, C. McNeile, C. Michael, C. Urbach, ETM Collaboration
Internal report | Preprint
P. Dimopoulos, DESY DESY Standort Zeuthen, 27. International Symposium On Lattice Field Theory Beijing LAT2009 China, R. Frezzotti, G. Herdoiza, K. Jansen, ...
Contribution to a conf. proceeding (book/online)
tmLQCD: a program suite to simulate Wilson Twisted mass Lattice QCD (2009)
K. Jansen, DESY DESY Standort Zeuthen, C. Urbach
Journal article
Pseudoscalar decay constants of kaon and D-mesons from Nf= 2 twisted mass Lattice QCD (2009)
B. Blossier, DESY DESY Standort Zeuthen, P. Dimopoulos, R. Frezzotti, B. Haas, G. Herdoiza, ...
Journal article
Light Meson Physics from Maximally Twisted Mass Lattice QCD (2009)
R. Baron, DESY DESY Standort Zeuthen, P. Boucaud, P. Dimopoulos, F. Farchioni, R. Frezzotti, ...
Internal report | Preprint
Results from ETMC in the light-quark sector 2009-07-06 - 2009-07-10 (2009)
G. Herdoiza, DESY DESY Standort Zeuthen, 6th International Workshop On Chiral Dynamics Bern CD09 Switzerland, P. Dimopoulos, R. Frezzotti, K. Jansen, ...
Contribution to a conf. proceeding (book/online)
R. Baron, DESY Forschung Hochenergiephysik, The XXVII International Symposium On Lattice Field Theory Beijing China, B. Blossier, P. Boucaud, A. Deuzeman, ...
Contribution to a conf. proceeding (book/online)
C. Urbach, DESY Forschung Mit Photonen, C. Evrard, V. Pudzaitis, J. Fastrez, P. Soumillion, ...
Journal article
Dimopoulos, P., Frezzotti, R., Herdoiza, G., Jansen, K., Michael, C., Urbach, C., ...
We present an update of the results for pion mass and pion decay constant as obtained by the ETM collaboration in large scale simulations with maximally twisted mass fermions and two mass degenerate...
Decay constants from twisted mass QCD (2008)
Dimopoulos, ETM Collaboration: P., McNeile, C., Michael, C., Simula, S., Urbach, C.
We present results for chiral extrapolations of the mass and decay constants of the rho meson. The data sets used are the nf=2 unquenched gauge configurations generated with twisted mass fermions by...
Monte Carlo simulations of the randomly forced Burgers equation (2008)
Düben, P., Homeier, D., Jansen, K., Mesterhazy, D., Münster, G., Urbach, C.
The behaviour of the one--dimensional random--forced Burgers equation is investigated in the path integral formalism, using a discrete space--time lattice. We show that by means of Monte Carlo...
Homeier, D., Jansen, K., Mesterhazy, D., Urbach, C.
We investigate the behaviour of stochastic differential equations, especially Burgers' eq., by means of Monte-Carlo-techniques.
The eta' meson from lattice QCD (2008)
Jansen, ETM Collaboration: K., Michael, C., Urbach, C.
We study the flavour singlet pseudoscalar mesons from first principles using lattice QCD. With N_f=2 flavours of light quark, this is the so-called eta_2 meson and we discuss the phenomenological...
Light baryon masses with dynamical twisted mass fermions (2008)
Alexandrou, C., Baron, R., Blossier, B., Brinet, M., Carbonell, J., Dimopoulos, P., ...
We present results on the mass of the nucleon and the Delta using two dynamical degenerate twisted mass quarks and the tree-level Symanzik improved gauge action. The evaluation is performed at four...
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...
Status of ETMC Simulations with Nf=2+1+1 Twisted Mass Fermions. (2008)
R. Baron, DESY Forschung Hochenergiephysik, Ph. Boucaud, A. Deuzeman, V. Drach, F. Farchioni, ...
Internal report | Preprint
Monte Carlo Simulations of the Randomly Forced Burgers Equation (2008)
P. Düben, DESY DESY Standort Zeuthen, D. Homeier, G. Münster, K. Jansen, D. Mesterhazy, ...
Internal report | Preprint
Dynamical Twisted Mass Fermions with Light Quarks: Simulation and Analysis Details (2008)
P. Boucauda, DESY DESY Standort Zeuthen, P. Dimopoulosb, F. Farchionic, R. Frezzottib, V. Gimenezd, ...
Journal article
The eta-prime meson from lattice QCD (2008)
K. Jansen, DESY DESY Standort Zeuthen, C. Michael, C. Urbach
Journal article
Exploring the epsilon regime with twisted mass fermions (2007)
Jansen, K., Nube, A., Shindler, A., Urbach, C., Wenger, U.
In this proceeding contribution we report on a first study in order to explore the so called epsilon regime with Wilson twisted mass (Wtm) fermions. To show the potential of this approach we give a...
Scaling and low energy constants in lattice QCD with N_f=2 maximally twisted Wilson quarks (2007)
Dimopoulos, ETM Collaboration: P., Frezzotti, R., Herdoiza, G., Urbach, C., Wenger, U.
We report on the scaling of basic hadronic observables in lattice QCD with N_f=2 maximally twisted Wilson dynamical quarks. We give preliminary results for some of the Gasser-Leutwyler low energy...
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...
Stout Smearing for Twisted Mass Fermions (2007)
Jansen, K., McNeile, C., Montvay, I., Richards, C., Scholz, E. E., Urbach, C., ...
The effect of Stout smearing is investigated in numerical simulations with twisted mass Wilson quarks. The phase transition near zero quark mass is studied on 12^3x24, 16^3x32 and 24^3x48 lattices at...
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
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...
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...
Numerical Simulation of QCD with u, d, s and c Quarks in the Twisted-mass Wilson Formulation. (2007)
T. Chiarappa, DESY Forschung Hochenergiephysik, F. Farchioni, K. Jansen, I. Montvay, E.E. Scholz, ...
Journal article
Stout Smearing for Twisted Mass Fermions. 2007-07-30 - 2007-08-04 (2007)
K. Jansen, DESY Forschung Hochenergiephysik DESY Standort Zeuthen, 25th International Symposium On Lattice Field Theory Regensburg Lattice 2007 Germany, C. McNeile, I. Montvay, C. Richards, ...
Contribution to a conf. proceeding (book/online)
Stout Smearing for Twisted Mass Fermions. 2007-07-30 - 2007-08-04 (2007)
K. Jansen, DESY DESY Standort Zeuthen, 25th International Symposium On Lattice Field Theory Regensburg LATTICE 2007 Germany, C. McNeile, I. Montvay, C. Richard, ...
Contribution to a conf. proceeding (book/online)
Iterative methods for overlap and twisted mass fermions (2006)
Chiarappa, T., Jansen, K., Nagai, K. -I., Papinutto, M., Scorzato, L., Shindler, A., ...
We present a comparison of a number of iterative solvers of linear systems of equations for obtaining the fermion propagator in lattice QCD. In particular, we consider chirally invariant overlap and...
Numerical simulation of QCD with u, d, s and c quarks in the twisted-mass Wilson formulation (2006)
Chiarappa, T., Farchioni, F., Jansen, K., Montvay, I., Scholz, E. E., Scorzato, L., ...
A first study of numerical Monte Carlo simulations with two quark doublets, a mass-degenerate one and a mass-split one, interpreted as u, d, s and c quarks, is carried out in the framework of the...
Nf=2 Lattice QCD and Chiral Perturbation Theory. 2005-09-14 - 2005-09-17 (2006)
L. Scorzato, DESY Forschung Hochenergiephysik, Workshop On Computational Hadron Physics (Hadron Physics 13) Nicosia Cyprus, F. Farchioni, P. Hofmann, K. Jansen, ...
Contribution to a conf. proceeding (journal)
Iterative methods for overlap and twisted mass fermions. (2006)
T. Chiarappa, DESY DESY Standort Zeuthen, K. Jansen, K.-I. Nagai, M. Papinutto, L. Scorzato, ...
Internal report | Preprint
Iterative methods for overlap and twisted mass fermions. (2006)
T. Chiarappa, DESY DESY Standort Zeuthen, K. Jansen, K.-I. Nagai, M. Papinutto, L. Scorzato, ...
Internal report | Preprint
Numerical simulation of QCD with u, d, s and c quarks in the twisted-mass Wilson formulation. (2006)
T. Chiarappa, DESY DESY Standort Zeuthen, F. Farchioni, K. Jansen, I. Montvay, E.E. Scholz, ...
Internal report | Preprint
Dynamical Twisted Mass Fermions with Light Quarks. (2006)
Ph. Boucaud, DESY Forschung Hochenergiephysik, P. Dimopoulos, F. Farchioni, R. Frezzotti, V. Gimenez, ...
Internal report | Preprint
Numerical Simulation of QCD with u, d, s and c Quarks in the Twisted-mass Wilson Formulation. (2006)
T. Chiarappa, DESY Forschung Hochenergiephysik, F. Farchioni, K. Jansen, I. Montvay, E.E. Scholz, ...
Internal report | Preprint
Numerical Simulations with two Flavours of Twisted-mass Wilson Quarks and DBW2 Gauge Action. (2006)
F. Farchioni, DESY Forschung Hochenergiephysik, P. Hofmann, K. Jansen, I. Montvay, G. Münster, ...
Journal article
Numerical simulations with two flavours of twisted-mass Wilson quarks and DBW2 gauge action (2005)
Farchioni, F., Hofmann, P., Jansen, K., Montvay, I., Muenster, G., Scholz, E. E., ...
Discretisation errors in two-flavour lattice QCD with Wilson-quarks and DBW2 gauge action are investigated by comparing numerical simulation data at two values of the bare gauge coupling. Both...
Nf=2 Lattice QCD and Chiral Perturbation Theory (2005)
Scorzato, L., Farchioni, F., Hofmann, P., Jansen, K., Montvay, I., Munster, G., ...
By employing a twisted mass term, we compare recent results from lattice calculations of Nf=2 dynamical Wilson fermions with Wilson Chiral Perturbation Theory (WChPT). The final goal is to determine...
Parton Distribution Functions with Twisted Mass Fermions (2005)
Capitani, S., Jansen, K., Papinutto, M., Shindler, A., Urbach, C., Wetzorke, I.
We present a first Wilson twisted mass fermion calculation of the matrix element between pion states of the twist-2 operator, which is related to the the lowest moment < x > of the valence quark...
HMC algorithm with multiple time scale integration and mass preconditioning (2005)
Jansen, K., Shindler, A., Urbach, C., Wenger, U.
We describe a new HMC algorithm variant we have recently introduced and extend the published results by preliminary results of a simulation with a pseudo scalar mass value of about 300 MeV. This new...
3-point functions from twisted mass lattice QCD at small quark masses (2005)
Capitani, S., Jansen, K., Papinutto, M., Shindler, A., Wetzorke, I., Urbach, C.
We show at the example of the matrix element between pion states of a twist-2, non-singlet operator that Wilson twisted mass fermions allow to compute this phenomenologically relevant quantitiy at...
Scaling test of quenched Wilson twisted mass QCD at maximal twist (2005)
Jansen, K., Papinutto, M., Shindler, A., Urbach, C., Wetzorke, I.
We present the results of an extended scaling test of quenched Wilson twisted mass QCD. We fix the twist angle by using two definitions of the critical mass, the first obtained by requiring the...
A (P)HMC algorithm for N_f = 2 + 1 + 1 flavours of twisted mass fermions (2005)
Chiarappa, T., Frezzotti, R., Urbach, C.
We present a detailed design of a (P)HMC simulation algorithm for N_f = 2 + 1 + 1 maximally twisted Wilson quark flavours. The algorithm retains even/odd and mass-shift preconditionings combined with...
Dynamical twisted mass fermions (2005)
Farchioni, F., Hofmann, P., Jansen, K., Montvay, I., Munster, G., Papinutto, M., ...
We summarize four contributions about dynamical twisted mass fermions. The resulting report covers results for N_f=2 obtained from three different gauge actions, namely the standard Wilson plaquette...
Twisted mass fermions: neutral pion masses from disconnected contributions (2005)
Farchioni, F., Jansen, K., McNeile, C., Michael, C., Montvay, I., Nagai, K., ...
Twisted mass fermions allow light quarks to be explored but with the consequence that there are mass splittings, such as between the neutral and charged pion. Using a direct calculation of the...
Flavour Breaking Effects of Wilson twisted mass fermions (2005)
Jansen, K., McNeile, C., Michael, C., Nagai, K., Papinutto, M., Pickavance, J., ...
We study the flavour breaking effects appearing in the Wilson twisted mass formulation of lattice QCD. In this quenched study, we focus on the mass splitting between the neutral and the charged pion,...
Quenched Scaling of Wilson twisted mass fermions (2005)
Jansen, K., Papinutto, M., Shindler, A., Urbach, C., Wetzorke, I.
We investigate the scaling behaviour of quenched Wilson twisted mass fermions at maximal twist applying two definitions of the critical mass. The first definition uses the vanishing of the...
Farchioni, F., Jansen, K., Montvay, I., Scholz, E. E., Scorzato, L., Shindler, A., ...
Lattice QCD with Wilson fermions generically shows the phenomenon of a first order phase transition. We study the phase structure of lattice QCD using Wilson twisted mass fermions and the Wilson...
HMC algorithm with multiple time scale integration and mass preconditioning (2005)
Urbach, C., Jansen, K., Shindler, A., Wenger, U.
We present a variant of the HMC algorithm with mass preconditioning (Hasenbusch acceleration) and multiple time scale integration. We have tested this variant for standard Wilson fermions at beta=5.6...
Light quarks with twisted mass fermions (2005)
Jansen, K., Papinutto, M., Shindler, A., Urbach, C., Wetzorke, I.
We investigate Wilson twisted mass fermions in the quenched approximation using different definitions of the critical bare quark mass m_c to realize maximal twist and, correspondingly, automatic O(a)...
Going chiral: overlap versus twisted mass fermions (2004)
Bietenholz, W., Capitani, S., Chiarappa, T., Christian, N., Hasenbusch, M., Jansen, K., ...
We compare the behavior of overlap fermions, which are chirally invariant, and of Wilson twisted mass fermions at full twist in the approach to the chiral limit. Our quenched simulations reveal that...
Farchioni, F., Jansen, K., Montvay, I., Scholz, E., Scorzato, L., Shindler, A., ...
The effect of changing the lattice action for the gluon field on the recently observed [1] first order phase transition near zero quark mass is investigated by replacing the Wilson plaquette action...
Comparing iterative methods for overlap and twisted mass fermions (2004)
Chiarappa, T., Jansen, K., Nagai, K. -I., Papinutto, M., Scorzato, L., Shindler, A., ...
We present a systematic comparison of various iterative methods to obtain the fermion propagator with both overlap and twisted mass fermions at fixed pion mass in the quenched approximation. Taking...
Comparison between overlap and twisted mass fermions towards the chiral limit (2004)
Bietenholz, W., Capitani, S., Chiarappa, T., Hasenbusch, M., Jansen, K., Nagai, K. -I., ...
We compare overlap fermions, which are chirally invariant, and Wilson twisted mass fermions in the approach to the chiral limit. Our quenched simulations reveal that with both formulations of lattice...
Exploring the phase structure of lattice QCD with twisted mass quarks (2004)
Farchioni, F., Urbach, C., Frezzotti, R., Jansen, K., Montvay, I., Rossi, G. C., ...
The phase structure of zero temperature twisted mass lattice QCD is investigated. We find strong metastabilities in the plaquette observable when the untwisted quark mass sweeps across zero.
Twisted mass quarks and the phase structure of lattice QCD (2004)
Farchioni, F., Frezzotti, R., Jansen, K., Montvay, I., Rossi, G. C., Scholz, E., ...
The phase structure of zero temperature twisted mass lattice QCD is investigated. We find strong metastabilities in the plaquette observable when the untwisted quark mass assumes positive or negative...
Extracting physics from an unphysical situation: light mesons in a small box (2003)
Bietenholz, W., Capitani, S., Chiarappa, T., Hasenbusch, M., Jansen, K., Muller-Preussker, M., ...
Quantum Chromo Dynamics is considered in a setup where the light mesons are squeezed into unphysically small boxes. We show how such a situation can be used to determine the couplings of the low...
Exploring the epsilon regime with twisted mass fermions. 2007-07-30 - 2007-08-04
K. Jansen, DESY DESY Standort Zeuthen, 25th International Symposium On Lattice Field Theory Regensburg LATTICE 2007 Germany, A. Nube, A. Shindler, C. Urbach, ...
Conference presentation
D. Homeier, DESY DESY Standort Zeuthen, 9th International Conference On Path Integrals: New Trends And Perspectives Dresden Germany, K. Jansen, D. Mesterhazy, C. Urbach
Conference presentation
D. Homeier, DESY DESY Standort Zeuthen, 9th International Conference On Path Integrals: New Trends And Perspectives Dresden PI007 Germany, K. Jansen, D. Mesterhazy, C. Urbach
Conference presentation