Zobrazeno 1 - 10
of 295
pro vyhledávání: '"Semi-Leptonic Decays"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 11, Pp 1-59 (2024)
Abstract We study the four-fold angular distribution of the semileptonic Λ b → Λ c + → Λ π + ℓ − ν ¯ ℓ $$ {\Lambda}_b\to {\Lambda}_c^{+}\left(\to \Lambda {\pi}^{+}\right){\ell}^{-}{\overline{\nu}}_{\ell } $$ decay and find out analyti
Externí odkaz:
https://doaj.org/article/0bf992bccb4a4af0be48646f125c4986
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 11, Pp 1-23 (2024)
Abstract We present theoretical predictions for observables in inclusive B ¯ → X s ℓ + ℓ − $$ \overline{B}\to {X}_s{\ell}^{+}{\ell}^{-} $$ suitable for measurements at hadron colliders through a sum-over-exclusive approach. At low q 2 we cal
Externí odkaz:
https://doaj.org/article/ca6bf6e5d3a24e449a51a2088c6cdabc
Autor:
Sudeepan Datta, Narayan Rana
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-32 (2024)
Abstract We present analytic results for three-loop fermionic corrections to the heavy-light form factors in perturbative quantum chromodynamics. Specifically, we present all light quark contributions and contributions from two heavy quark loops. We
Externí odkaz:
https://doaj.org/article/c19c63cf59434494953cb94a8fb374f1
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-24 (2024)
Abstract The theoretical description and data for inclusive semileptonic B decays have reached incredible precision. This motivated us to re-animate the discussion of possible Quark-Hadron Duality violations. There seems that there is currently no ev
Externí odkaz:
https://doaj.org/article/498c3aca115745f58df57b4eaeada2b2
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-24 (2024)
Abstract We investigate the Λ c → Λℓ + ν ℓ decay with a focus on potential new physics (NP) effects in the ℓ = μ channel. We employ an effective Hamiltonian within the framework of the Standard Model Effective Field Theory (SMEFT) to cons
Externí odkaz:
https://doaj.org/article/f632033f7cae4ea69fc0a31b2e17fd38
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-64 (2024)
Abstract We investigate the possibility of disentangling different new physics contributions to the rare meson decays and through kinematic distributions in the missing energy . We employ dimension-6 operators within the Low-Energy Effective Field Th
Externí odkaz:
https://doaj.org/article/622e0013f6bc4d22a0eb493ff46e421f
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-28 (2024)
Abstract We study the available data on exclusive leptonic and semileptonic c → sℓ + ν decays within the Standard Model and beyond. Our analysis accounts for theory correlations between the relevant hadronic matrix elements through application o
Externí odkaz:
https://doaj.org/article/05869d73ca1a42ba800166c5cf5295eb
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