Results 41 to 50 of about 2,021,845 (193)
Journal of High Energy Physics, 2023 Leptoquarks with masses between 2 TeV and 50 TeV are commonly invoked to explain deviations between data and Standard-Model (SM) predictions of several observables in the decays b → cτ ν ¯ $$ b\to c\tau \overline{\nu} $$ and b → sℓ + ℓ − with ℓ = e, μ ...
Marco Fedele +2 more
doaj +1 more source
CP violation in Semi-Leptonic τ decays
AIP Conference Proceedings, 2007 We study CP violation in semi-leptonic $τ$ decays and we determine the conditions necessary to be able to define a observable CP asymmetry. We apply these conditions in both models, the standard model for the electroweak interactions and its supersymmetric extensions.
openaire +2 more sources
Semi-leptonic decays heavy-light to heavy-light [PDF]
Nuclear Physics B - Proceedings Supplements, 2000 We present results for the QCD matrix elements involved in semi-leptonic decays of B-mesons into pseudo scalar heavy light states. The application of NRQCD heavy quarks allows for quark masses around the physical b-quark. We investigate the dependence of the form factors on the external momenta and looked at the mass dependence at zero recoil.
Hein, J. +4 more
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Semi-leptonic decays of charmed baryons [PDF]
Nuclear Physics B, 1976 Abstract We present estimates of semi-leptonic decays of the charmed 1+ 2 baryons, members of the SU(3) 3∗ and 6 multiplets, into ordinary 1+ 2 and 3+ 2 baryons. We give general expressions for decay rates and the mass M(B+l) spectra.
openaire +1 more source
B → K∗µ+µ− and Form Factors for Semi-Leptonic and Radiative B Decays [PDF]
, 2010 The hadronic environment of the LHC favours the study of exclusive modes, and of these semi-leptonic and radiative B decays will play a leading role in the search for new physics (NP).
BHARUCHA, AOIFE,KATY,MANEK +1 more
core
Rare leptonic and semi-leptonic decays at LHCb [PDF]
Rare leptonic and semi-leptonic decays offer an excellent opportunity to test the Standard Model of Particle Physics. These proceedings report on two recent LHCb measurements. The first is an observation of the rare $J/\psi \to \mu^{+}\mu^{-}\mu^{+}\mu^{-
Hadavizadeh, Tom
core +2 more sources
Uniting low-energy semileptonic and hadronic anomalies within SMEFT
Journal of High Energy PhysicsTwo categories of four-fermion SMEFT operators are semileptonic (two quarks and two leptons) and hadronic (four quarks). At tree level, an operator of a given category contributes only to processes of the same category.
Alakabha Datta +3 more
doaj +1 more source
Probing lepton universality with (semi)-leptonic B decays [PDF]
SciPost Physics Proceedings, 2019 The most recent measurements of the observables R_{D^{(*)}} R D
Giovanni Banelli +3 more
openaire +3 more sources
Non-leptonic B-decays in and beyond QCD factorisation [PDF]
, 2005 This thesis examines the non-leptonic B-decays within QCD factorization and beyond, to challenge the assumptions and limitations of the method. We analyse the treatment of the distribution amplitudes of light mesons and present a new model described by ...
Talbot, Angelique N. +1 more
core
Measurement of b-hadron branching fractions for two-body decays into charmless charged hadrons [PDF]
, 2012 Based on data corresponding to an integrated luminosity of 0.37 fb−1 collected by the LHCb experiment in 2011, the following ratios of branching fractions are measured: B(B0→π+π−)/B(B0→K+π−)=0.262±0.009±0.017,(fs/fd)⋅B(B0s→K+K−)/B(B0→K+π−)=0.316±0.009±0 ...
HASH(0x55a6805868f0) +12 more
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