Results 31 to 40 of about 2,235,212 (197)
Semi-leptonic decays of heavy mesons [PDF]
Nuclear Physics B - Proceedings Supplements, 1999 3 pages, 3 figures (LATTICE 98 matrixelement) Corrections to figures and ...
UKQCD Collaboration, Maynard, Chris
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Anomalies in b → s Transitions and Dark Matter
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 Since 2013, the LHCb collaboration has reported on the measurement of several observables associated with b → s transitions, finding various deviations from their predicted values in the Standard Model. These include a set of deviations in branching ratios and angular observables, as well as in the observables RK and RK⁎, specially built to test the ...
Avelino Vicente, Farinaldo Queiroz
wiley +1 more source
Charm physics confronts high-p T lepton tails
Journal of High Energy Physics, 2020 We present a systematic survey of possible short-distance new-physics effects in (semi)leptonic charged- and neutral-current charmed meson decays. Using the Standard Model Effective Field Theory (SMEFT) to analyze the most relevant experimental data at ...
Javier Fuentes-Martín +3 more
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Disintegration of beauty: a precision study
Journal of High Energy Physics, 2023 We update the Standard Model (SM) predictions for B-meson lifetimes within the heavy quark expansion (HQE). Including for the first time the contribution of the Darwin operator, SU(3) F breaking corrections to the matrix element of dimension-six four ...
Alexander Lenz +2 more
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Study of B¯d,s⁎0→Dd,s+M- Decays with QCD Factorization Approach
Advances in High Energy Physics, Volume 2016, Issue 1, 2016., 2016 Motivated by the b‐physics experiments at running LHC and upcoming SuperKEKB/Belle‐II, the nonleptonic B¯q⁎0→Dq+M- (q = d, s and M = π, K, ρ, K⁎) weak decays are studied within QCD factorization framework. The observables of these decay modes are first predicted.
Qin Chang +5 more
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(Semi-)Leptonic D decays at BESIII
Nuclear and Particle Physics Proceedings, 2022 BESIII has collected 2.93 fb-1 of data at 3.773 GeV, and 6.3 fb-1 of data between 4.18 and 4.23 GeV, respectively. We will report precison measurements of the decay constants fDs+ and the CKM matrix elements |Vcs| via D(s)+ -> l+v (l=mu, tau), which are important to test the LQCD calculations and the CKM matrix unitarity.
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Prospects for Studies of the Free Fall and Gravitational Quantum States of Antimatter
Advances in High Energy Physics, Volume 2015, Issue 1, 2015., 2015 Different experiments are ongoing to measure the effect of gravity on cold neutral antimatter atoms such as positronium, muonium, and antihydrogen. Among those, the project GBAR at CERN aims to measure precisely the gravitational fall of ultracold antihydrogen atoms.
G. Dufour +9 more
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Standard Model predictions for lepton flavour universality ratios of inclusive semileptonic B decays
Journal of High Energy Physics, 2022 We present Standard Model predictions for lepton flavour universality ratios of inclusive B → X(c) ℓ ν ¯ ℓ $$ \ell {\overline{\nu}}_{\ell } $$ . For the ℓ = μ, e, these ratios are very close to unity as expected.
Muslem Rahimi, K. Keri Vos
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Exploring New Models in All Detail with SARAH
Advances in High Energy Physics, Volume 2015, Issue 1, 2015., 2015 I give an overview about the features the Mathematica package SARAH provides to study new models. In general, SARAH can handle a wide range of models beyond the MSSM coming with additional chiral superfields, extra gauge groups, or distinctive features like Dirac gaugino masses.
Florian Staub, Gordon Kane
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Current Direct Neutrino Mass Experiments
Advances in High Energy Physics, Volume 2013, Issue 1, 2013., 2013 In this contribution, we review the status and perspectives of direct neutrino mass experiments, which investigate the kinematics of β‐decays of specific isotopes (3H, 187Re, 163Ho) to derive model‐independent information on the averaged electron (anti)neutrino mass. After discussing the kinematics of β‐decay and the determination of the neutrino mass,
G. Drexlin +4 more
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