Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Alakabha Datta"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 6, Pp 1-8 (2024)
Abstract We explain recent LHCb measurements of the lepton universality ratios, $$R_{D^{(*)}}^{\tau /\ell }\equiv \frac{\mathcal {B}(\bar{B} \rightarrow D^{(*)+} \tau ^- \bar{\nu }_\tau )}{\mathcal {B}(\bar{B} \rightarrow D^{(*)+}\ell ^- \bar{\nu }_\
Externí odkaz:
https://doaj.org/article/a7656afa113a4e57be93cf76c7580dd0
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-34 (2023)
Abstract We study flavor changing neutral current decays of B and K mesons in the dark U(1) D model, with the dark photon/dark Z mass between 10 MeV and 2 GeV. Although the model provides an improved fit (compared to the standard model) to the differ
Externí odkaz:
https://doaj.org/article/b454eb91b9524c09aade19f56be24ec9
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 10, Pp 1-15 (2021)
Abstract Model-independent description of nonleptonic decays of charmed mesons is a challenging task due to large nonperturbative effects of strong interactions on the transition amplitudes. We discuss the equivalence of two different flavor-SU(3)-ba
Externí odkaz:
https://doaj.org/article/fe26c836ae6346569bd670a5ac342fcb
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 5, Pp 1-13 (2021)
Abstract The Standard Model Neutrino Effective Field Theory (SMNEFT) is the Standard Model Effective Field Theory (SMEFT) augmented with right-handed neutrinos. Building on our previous work, arXiv:2010.12109, we calculate the Yukawa coupling contrib
Externí odkaz:
https://doaj.org/article/854c3b5b74ad4e8d94e203786241e3fb
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 2, Pp 1-19 (2021)
Abstract Standard Model Neutrino Effective Field Theory (SMNEFT) is an effective theory with Standard Model (SM) gauge-invariant operators constructed only from SM and right-handed neutrino fields. For the full set of dimension-six SMNEFT operators,
Externí odkaz:
https://doaj.org/article/41f4a48e5ae248fb924945202bfc07c0
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-30 (2020)
Abstract At present, the measurements of R D ∗ $$ {R}_{D^{\left(\ast \right)}} $$ and R J/ψ hint at new physics (NP) in b → c τ − v ¯ $$ b\to c{\tau}^{-}\overline{v} $$ decays. The angular distribution of B ¯ → D ∗ → Dπ τ − v ¯
Externí odkaz:
https://doaj.org/article/4b773db3fc524dfaa510e6621765a5cc
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 5, Pp 1-25 (2019)
Abstract In order to explain the observed anomalies in the measurements of R D ∗ $$ {R}_{D^{\left(\ast \right)}} $$ and R J/ψ , a variety of new-physics (NP) models that contribute to b → c τ − ν ¯ $$ b\to c{\tau}^{-}\overline{\nu} $$ have
Externí odkaz:
https://doaj.org/article/294825043271403c9cec803d358f1ac9
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 1, Pp 1-18 (2019)
Abstract We examine current constraints on and the future sensitivity to the strength of couplings between quarks and neutrinos in the presence of a form factor generated from loop effects of hidden sector particles that interact with quarks via new
Externí odkaz:
https://doaj.org/article/c20edd4e123a4022b28938a90b171eba
Publikováno v:
Physics Letters B, Vol 807, Iss , Pp 135579- (2020)
We present a dark sector model that reproduces the KOTO, MiniBooNE and muon anomalous magnetic moment anomalies. The dark sector is comprised of a light scalar singlet S that has a large coupling to a slightly heavier sterile neutrino that mixes with
Externí odkaz:
https://doaj.org/article/ddc11fcd5df742fc83cc94e1b9b5df0c
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 1, Pp 1-30 (2018)
Abstract For a number of years, there has been a certain inconsistency among the measurements of the branching ratios and CP asymmetries of the four B → πK decays (B + → π+ K 0, B + → π0 K +, B d 0 → π − K +, B d 0 → π 0 K 0). In thi
Externí odkaz:
https://doaj.org/article/7fb0ab72da5b4343a8542a426423161f