Power suppressed effects in B-> X_s gamma at O(alpha_s) (2009)
Ewerth, Thorsten, Gambino, Paolo, Nandi, Soumitra
We compute the O(alpha_s) corrections to the Wilson coefficients of the dimension five operators emerging from the Operator Product Expansion of inclusive radiative B decays. We discuss the impact of...
Normalizing inclusive rare B decays (2008)
Gambino, Paolo, Giordano, Paolo
The inclusive semileptonic branching ratio is often employed to normalize other inclusive B decays. Using recent determinations of the non-perturbative parameters of the Operator Product Expansion we...
Running-coupling effects in the triple-differential charmless semileptonic decay width (2006)
Gambino, Paolo, Gardi, Einan, Ridolfi, Giovanni
We compute the fully-differential B -> X_u l nu decay width to all orders in perturbation theory in the large-beta0 limit. Each of the five structure functions that build the hadronic tensor is...
Semileptonic and radiative B decays circa 2005 (2005)
I briefly review the theoretical status of semileptonic and radiative B decays in 2005.
Hadronic mass and q^2 moments of charmless semileptonic B decay distributions (2005)
Gambino, Paolo, Ossola, Giovanni, Uraltsev, Nikolai
We report OPE predictions for hadronic mass and q^2 moments in inclusive semileptonic B decays without charm, taking into account experimental cuts on the charged lepton energy and on the hadronic...
Determining the sign of the b -> s gamma amplitude (2004)
Gambino, Paolo, Haisch, Ulrich, Misiak, Mikolaj
The latest Belle and BaBar measurements of the inclusive B -> X_s l^+ l^- branching ratio have smaller errors and lower central values than the previous ones. We point out that these results indicate...
Moments of semileptonic B decay distributions in the 1/m_b expansion (2004)
Gambino, Paolo, Uraltsev, Nikolai
We report the OPE-based predictions for a number of lepton energy and hadronic mass moments in the inclusive semileptonic B -> X_c \ell\nu decays with a lower cut on the charged lepton energy. We...
Complete NNLO QCD Analysis of B -> X_s l^+ l^- and Higher Order Electroweak Effects (2003)
Bobeth, Christoph, Gambino, Paolo, Gorbahn, Martin, Haisch, Ulrich
We complete the next-to-next-to-leading order QCD calculation of the branching ratio for B -> X_s l^+ l^- including recent results for the three-loop anomalous dimension matrix and two-loop matrix...
The Top Priority: Precision Electroweak Physics from Low to High Energy (2003)
Overall, the Standard Model describes electroweak precision data rather well. There are however a few areas of tension (charged current universality, NuTeV, (g-2)_\mu, b quark asymmetries), which I...
Anomalous Dimension Matrix for Radiative and Rare Semileptonic B Decays up to Three Loops (2003)
Gambino, Paolo, Gorbahn, Martin, Haisch, Ulrich
We compute the complete O(alphas^2) anomalous dimension matrix relevant for the b to s gamma, b to s gluon and b to s l+l- transitions in the standard model and some of its extensions. For radiative...
Heavy quark parameters and Vcb from spectral moments in semileptonic B decays (2003)
Battaglia, Marco, Calvi, Marta, Gambino, Paolo, Oyanguren, Arantza, Roudeau, Patrick, Salmi, Laura, ...
9 pages, 2 figures, 7 tables.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0210319.-- Printed version published Mar 13, 2003.
Precision Electroweak Measurements Circa 2002 (2002)
Present global fits to electroweak data are characterized by two results that differ from Standard Model expectations by about 3 sigma, the NuTeV measurement of sin^2theta_W and the FB b quark...
Precision Electroweak Measurements Circa 2002 (2002)
Present global fits to electroweak data are characterized by two results that differ from Standard Model expectations by about 3 sigma, the NuTeV measurement of sin^2theta_W and the FB b quark...
A new model-independent way of extracting |$V_{ub}/V_{cb}$| (2002)
Aglietti, U, Ciuchini, M, Gambino, Paolo
The ratio between the photon spectrum in B -> X_s gamma and the differential semileptonic rate wrt the hadronic variable M_X/E_X is a short-distance quantity calculable in perturbation theory and...
A new model-independent way of extracting |V_ub/V_cb| (2002)
Aglietti, Ugo, Ciuchini, Marco, Gambino, Paolo
The ratio between the photon spectrum in B -> X_s gamma and the differential semileptonic rate wrt the hadronic variable M_X/E_X is a short-distance quantity calculable in perturbation theory and...
Old and new physics interpretations of the NuTeV anomaly (2001)
Davidson, Sacha, Forte, Stefano, Gambino, Paolo, Rius, N, Strumia, A
We discuss whether the NuTeV anomaly can be explained, compatibly with all other data, by QCD effects (maybe, if the strange sea is asymmetric, or there is a tiny violation of isospin), new physics...
Complete electroweak matching for radiative B decays (2001)
We compute the complete two-loop O(alpha) Wilson coefficients relevant for radiative decays of the B meson in the SM. This is a necessary step in the calculation of the O(alpha alpha_s^n ln^n...
Complete electroweak matching for radiative B decays (2001)
Gambino, Paolo, Haisch, Ulrich
We compute the complete two-loop O(alpha) Wilson coefficients relevant for radiative decays of the B meson in the SM. This is a necessary step in the calculation of the O(alpha alpha_s^n ln^n...
Indication for Light Sneutrinos and Gauginos from Precision Electroweak Data (2001)
Altarelli, Guido, Caravaglios, F, Giudice, Gian Francesco, Gambino, Paolo, Ridolfi, G
The present Standard Model fit of precision data has a low confidence level, and is characterized by a few inconsistencies. We look for supersymmetric effects that could improve the agreement among...
Physics at the front-end of a neutrino factory: a quantitative appraisal (2001)
Mangano, Michelangelo L, Alekhin, S I, Anselmino, M, Ball, R D, Boglione, M, D'Alesio, U, ...
We present a quantitative appraisal of the physics potential for neutrino experiments at the front-end of a muon storage ring. We estimate the forseeable accuracy in the determination of several...
Quark mass effects in $\overline{B} \to X_{s \gamma}$ (2001)
The charm-loop contribution to B -> Xs gamma is found to be numerically dominant and very stable under logarithmic QCD corrections. The strong enhancement of the branching ratio by QCD logarithms is...
Quark mass effects in B -> Xs gamma (2001)
Gambino, Paolo, Misiak, Mikolaj
The charm-loop contribution to B -> Xs gamma is found to be numerically dominant and very stable under logarithmic QCD corrections. The strong enhancement of the branching ratio by QCD logarithms is...
Present and Future CP Measurements (2001)
Hurth, Tobias, Kim, C S, Shepherd-Themistocleous, C H, Wilson, F F, Azfar, F, Barlow, R, ...
We review theoretical and experimental results on CP violation summarizing the discussions in the working group on CP violation at the UK phenomenology workshop 2000 in Durham.
Present and Future CP Measurements (2001)
Hurth, Tobias, Kim, Choong Sun, Shepherd-Themistocleous, Claire, Wilson, Fergus, Azfar, Farrukh, Barlow, Roger, ...
We review theoretical and experimental results on CP violation summarizing the discussions in the working group on CP violation at the UK phenomenology workshop 2000 in Durham.
Complete electroweak matching for radiative B decays (2001)
We compute the complete two-loop O(alpha) Wilson coefficients relevant for radiative decays of the B meson in the SM. This is a necessary step in the calculation of the O(alpha alpha_s^n ln^n...
Complete electroweak matching for radiative B decays (2001)
Gambino, Paolo, Haisch, Ulrich
We compute the complete two-loop O(alpha) Wilson coefficients relevant for radiative decays of the B meson in the SM. This is a necessary step in the calculation of the O(alpha alpha_s^n ln^n...
$B \to X_{s}\gamma$ in supersymmetry: large contributions beyond the leading order (2000)
Degrassi, G, Gambino, Paolo, Giudice, Gian Francesco
We discuss possible large contributions to B -> X_s gamma, which can occur at the next-to-leading order in supersymmetric models. They can originate from terms enhanced by tan(beta) factors, when the...
Electroweak effects in radiative B decays (2000)
We compute the two-loop electroweak corrections to the radiative decays of the B meson in the SM. Electroweak effects reduce the Wilson coefficient C_7^eff(mw) by 2.6% for a light Higgs boson of...
Electroweak effects in radiative B decays (2000)
Gambino, Paolo, Haisch, Ulrich
We compute the two-loop electroweak corrections to the radiative decays of the B meson in the SM. Electroweak effects reduce the Wilson coefficient C_7^eff(mw) by 2.6% for a light Higgs boson of...
Universal Unitarity Triangle and Physics Beyond the Standard Model (2000)
Buras, Andrzej J, Gambino, Paolo, Gorbahn, M, Jäger, S, Silvestrini, L
We make the simple observation that there exists a universal unitarity triangle for all models, like the SM, the Two Higgs Doublet Models I and II and the MSSM with minimal flavour violation, that do...
The Nielsen Identities of the SM and the definition of mass (1999)
Gambino, Paolo, Grassi, Pietro Antonio
In a generic gauge theory the gauge parameter dependence of individual Green functions is controlled by the Nielsen identities, which originate from an enlarged BRST symmetry. We give a practical...
Presion tests of the SM: higher order corrections and the Higgs mass (1998)
Recent calculations of the two-loop electroweak effects enhanced by powers of the top mass have been implemented in the main electroweak libraries and have an important effect on the indirect...
Next-to-Leading QCD Corrections to $B \to X_{s} \gamma $ in Supersymmetry (1998)
Ciuchini, M, Degrassi, G, Gambino, Paolo, Giudice, Gian Francesco
We compute the QCD next-to-leading order matching conditions of the (chromo)-magnetic operators relevant for B\to X_s \gamma in supersymmetric models with minimal flavour violation. The calculation...
Ciuchini, M, Degrassi, G, Gambino, Paolo, Giudice, Gian Francesco
We present the QCD corrections to the matching conditions of the Delta B =1 magnetic and chromo-magnetic operators in the Standard Model and in two-Higgs doublet models. We use an off-shell matching...
The Role of $M_W$ in Precision Studies of the Standard Model (1997)
Degrassi, G, Gambino, Paolo, Passera, M, Sirlin, A
Recent calculations have significantly decreased the scheme and residual scale dependence of basic radiative corrections of the Standard Electroweak Model. This leads to a theoretically accurate...
Two-loop heavy top effects on precision observables and the Higgs mass (1997)
The electroweak corrections induced by a heavy top on the main precision observables are now available up to O(g^4 mt^2/mw^2). The new results significantly reduce the theoretical uncertainty and...
Precision tests of the SM and higher order effects: the example of the effective mixing angle (1996)
The radiative corrections involved in the precise determination of the electroweak mixing angle measured at the Z-peak are reviewed in detail, with particular emphasis on the new calculation of...
Two-loop heavy top effects on precision observables (1996)
The corrections induced by a heavy top on the main precision observables are now available up to O(alpha^2 mt^2/mw^2). The new results imply a significant reduction of the theoretical uncertainty and...
Polarization and Weak Mixing Angle in High Energy e^\pm e^- Collisions (1996)
Cuypers, Frank, Gambino, Paolo
At a linear collider of the next generation the large event rates expected from Bhabha and M\o ller scattering may be used to determine simultaneously sin^2\theta_w and the polarization of both beams...
Recent developments in the field of high precision calculations in the Standard Model are illustrated with particular emphasis on the evidence for radiative corrections and on the estimate of the...
Renormalon contributions to \delta\rho (1995)
Gambino, Paolo, Sirlin, Alberto
Leading QCD vacuum polarization contributions to the electroweak parameter $\delta\rho$ are evaluated numerically using several different prescriptions for the gluon self-energy. Simple theoretical...
Recent developments in the field of high precision calculations in the Standard Model are illustrated with particular emphasis on the evidence for radiative corrections and on the estimate of the...
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Two-loop next-to-leading m$_{t}$ corrections to the $\varrho$ parameter (1994)
Degrassi, G, Fanchiotti, S, Gambino, Paolo
The O(G^2_\mu m_t^4) correction to the \rho parameter is computed within the Standard Model using the current algebra formulation of radiative corrections. This approach is proved to be equivalent to...