Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Soumitra Nandi"'
Autor:
Lipika Kolay, Soumitra Nandi
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-57 (2024)
Abstract This study focuses on a combined analysis of various available inputs to constrain the parameter spaces of a simplified dark matter (SDM) model featuring a spin-0 mediator and fermionic dark matter (DM). The spin-0 mediator interacts with st
Externí odkaz:
https://doaj.org/article/0832f6c4512840bf9138ca8899c95939
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-35 (2024)
Abstract We investigate flavor violating four-Fermi Standard Model Effective Field Theory (SMEFT) operators of dimension-six that can be probed via tc t ¯ c + t c ¯ $$ \left(\overline{t}c+t\overline{c}\right) $$ production at the multi-TeV muon col
Externí odkaz:
https://doaj.org/article/b9bda86ab3b842e9af25ed6a6afb451e
Autor:
Ipsita Ray, Soumitra Nandi
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 1, Pp 1-42 (2024)
Abstract We study the B ¯ → D D ∗ ℓ − ν ¯ ℓ $$ \overline{B}\to D\left({D}^{\ast}\right){\ell}^{-}{\overline{\nu}}_{\ell } $$ decays based on the up-to-date available inputs from experiments and the lattice. First, we review the standard
Externí odkaz:
https://doaj.org/article/06d52a7cf0754a37be8b42923efb09f0
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 7, Pp 1-29 (2023)
Abstract We have extracted the ratio |V ub |/|V cb | from a combined study of the available inputs on B ¯ → π ρ ω ℓ − ν ¯ ℓ $$ \overline{B}\to \left(\pi, \rho, \omega \right){\ell}^{-}{\overline{\nu}}_{\ell } $$ and B ¯ B ¯ s → D
Externí odkaz:
https://doaj.org/article/96d92a0f6e1043f383091145ea89565d
Publikováno v:
Physics Letters B, Vol 848, Iss , Pp 138345- (2024)
We constrain the inverse moment of the B-meson light-cone distribution amplitude (LCDA), λB in heavy quark effective theory, using form factor estimates from Lattice QCD collaboration. The estimation of the parameter λB has, until now, relied solel
Externí odkaz:
https://doaj.org/article/9f5c37a62c7f4838ab4e82592f1bb20d
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 3, Pp 1-72 (2023)
Abstract After incorporating all the available experimental data and the most up-to-date Lattice and light cone sum rule (LCSR) inputs on the form factors, we analyze the exclusive b → uℓν ℓ and b → dℓℓ decays simultaneously. We have ext
Externí odkaz:
https://doaj.org/article/7dcde3874e2546c69685ae04e1224bb0
Autor:
Aritra Biswas, Soumitra Nandi
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 9, Pp 1-27 (2021)
Abstract This article analyses the available inputs in B → πℓν ℓ and B → ρℓν ℓ decays which include the measured values of differential rate in different q 2-bins (lepton invariant mass spectrum), lattice, and the newly available inpu
Externí odkaz:
https://doaj.org/article/9c4a4f289b0348b2bdaf790e1e70f492
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 7, Pp 1-24 (2021)
Abstract To extract the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |V ub |, we have re-analyzed all the available inputs (data and theory) on the B → πℓν decays including the newly available inputs on the form-factors from light cone sum ru
Externí odkaz:
https://doaj.org/article/1f6b6399ce94404eb6374a04ad2f76fc
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 4, Pp 1-21 (2021)
Abstract We compute the O(α s ) corrections to the Wilson coefficients of the dimension five operators in inclusive semileptonic B decays in the limit of a massless final quark. Our calculation agrees with reparametrization invariance and with previ
Externí odkaz:
https://doaj.org/article/0c611a2de28446809d594f19e66eecd0
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 12, Pp 1-67 (2020)
Abstract We study a generic leptophilic U(1) X extension of the standard model with a light gauge boson. The U(1) X charge assignments for the leptons are guided by lepton universality violating (LUV) observables in semileptonic b → sℓℓ decays,
Externí odkaz:
https://doaj.org/article/1b57d1e1814d4caab49dec49a7901879