Zobrazeno 1 - 10
of 275
pro vyhledávání: '"Semi-Leptonic Decays"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 8, Pp 1-28 (2024)
Abstract In this work, we make a study of the τ − → ωπ − ν τ decay in the framework of low-energy effective field theory. The J P G $$ {J}^{\mathcal{P}G} $$ decompositions of the quark currents and the ωπ final state show that, besides t
Externí odkaz:
https://doaj.org/article/37a4403690a54f3987f5a232da901848
Autor:
Alexei Sibidanov, Thomas E. Browder, Shawn Dubey, Shahab Kohani, Rusa Mandal, Saurabh Sandilya, Rahul Sinha, Sven E. Vahsen
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 8, Pp 1-35 (2024)
Abstract Within the widely used EvtGen framework, we have added a new event generator model for B → K * ℓ + ℓ − with improved standard model (SM) decay amplitudes and possible BSM physics contributions, which are implemented in the operator p
Externí odkaz:
https://doaj.org/article/02ede5a30ae84f70bbcd0fd711395eee
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-56 (2024)
Abstract We study the effects of anomalous thresholds on the non-local form factors describing the hadronization of the light-quark contribution to B → (P, V)γ * transitions. Starting from a comprehensive discussion of anomalous thresholds in the
Externí odkaz:
https://doaj.org/article/a50842b23e0b4e14a586598be6765f9b
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-43 (2024)
Abstract Quantum entanglement is a fundamental property of quantum mechanics. Recently, studies have explored entanglement in the t t ¯ $$ t\overline{t} $$ system at the Large Hadron Collider (LHC) when both the top quark and anti-top quark decay le
Externí odkaz:
https://doaj.org/article/f64fcd0601374dd390607ad9fe781615
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 6, Pp 1-20 (2024)
Abstract We investigate the inverse moment of the B s -meson light-cone distribution amplitude (LCDA), denoted as λ B s $$ {\lambda}_{B_s} $$ and defined within the heavy quark effective theory, through the calculation of B s → η s form factors.
Externí odkaz:
https://doaj.org/article/103385a78bb14d29960d8de9069ff288
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 6, Pp 1-48 (2024)
Abstract Recently, the Belle II collaboration announced the first measurement of the branching ratio B B + → K + ν ν ¯ $$ \mathcal{B}\left({B}^{+}\to {K}^{+}\nu \overline{\nu}\right) $$ , which is found to be about 2.7σ higher than the Standard
Externí odkaz:
https://doaj.org/article/edca45cc077b4b53ba06b0adede4ab61
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 6, Pp 1-21 (2024)
Abstract We propose an approach for measuring the moments of the hadronic invariant mass distribution in semileptonic B s 0 $$ {B}_s^0 $$ meson decays using a sum-of-exclusive technique. Using the present and foreseen knowledge about exclusive semile
Externí odkaz:
https://doaj.org/article/2c9e13001c36498f839aa2246255e733
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 6, Pp 1-26 (2024)
Abstract A model-independent expression for the Dalitz plot of the semileptonic decays of a neutral kaon K μ 3 0 $$ {K}_{\mu 3}^0 $$ , including radiative corrections to order O $$ \mathcal{O} $$ [(α/π)(q/M 1)], where q is the four-momentum transf
Externí odkaz:
https://doaj.org/article/93066b0a60c648609fadba5e27af0351
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 6, Pp 1-17 (2024)
Abstract We investigate the hyperon semileptonic decays within the framework of QCD sum rules. The flavor SU(3) symmetry breaking effects are analyzed via the relevant form factors and corresponding branching fractions. Employing the z-series paramet
Externí odkaz:
https://doaj.org/article/9385747348bc466e8c337ba14575d71f
Autor:
Matteo Fael, Florian Herren
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-19 (2024)
Abstract We calculate the next-to-next-to-leading order QCD corrections to the leptonic invariant mass (q 2) spectrum of semileptonic b → c inclusive decays, taking into account the mass of the charm quark and the charged lepton in the final state.
Externí odkaz:
https://doaj.org/article/5a31fa4d3a454000aafa68d674ba0eb7