Study of B+c→J/ψD+s and B+c→J/ψD∗+s decays in pp collisions at s√ = 13 TeV with the ATLAS detector

Aad, G.Abbott, B.Abbott, D.C.Abed Abud, A.Abeling, K.Abhayasinghe, D.K.Abidi, S.H.Aboulhorma, A.Abramowicz, H.Abreu, H.Abulaiti, Y.Abusleme Hoffman, A.C.Acharya, B.S.Achkar, B.Adam, L.Adam Bourdarios, C.Adamczyk, L.Adamek, L.Addepalli, S.V.Adelman, J.et al.2022-09-152022-09-152022Journal of High Energy Physics (JHEP), 2022; 2022(8):1-421029-84791029-8479https://hdl.handle.net/2440/136418Published: August 5, 2022A study of B+c→J/ψD+s and B+c→J/ψD∗+s decays using 139 fb−1 of integrated luminosity collected with the ATLAS detector from s√ = 13 TeV pp collisions at the LHC is presented. The ratios of the branching fractions of the two decays to the branching fraction of the B+c → J/ψπ+ decay are measured: B(B+c→J/ψD+s)/B(B+c→J/ψπ+) = 2.76 ± 0.47 and B(B+c→J/ψD∗+s)/B(B+c→J/ψπ+) = 5.33 ± 0.96. The ratio of the branching fractions of the two decays is found to be B(B+c→J/ψD∗+s)/B(B+c→J/ψD∗+s) = 1.93 ± 0.26. For the B+c→J/ψD∗+s decay, the transverse polarization fraction, Γ±±/Γ, is measured to be 0.70 ± 0.11. The reported uncertainties include both the statistical and systematic components added in quadrature. The precision of the measurements exceeds that in all previous studies of these decays. These results supersede those obtained in the earlier ATLAS study of the same decays with s√ = 7 and 8 TeV pp collision data. A comparison with available theoretical predictions for the measured quantities is presented.enOpen Access, Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP3. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. SCOAP3 supports the goals of the International Year of Basic Sciences for Sustainable Development.B Physics; Hadron-Hadron ScatteringStudy of B+c→J/ψD+s and B+c→J/ψD∗+s decays in pp collisions at s√ = 13 TeV with the ATLAS detectorStudy of B+c ->J/psiD+s and B+c ->J/psiD∗+s decays in pp collisions at s root = 13 TeV with the ATLAS detectorJournal article10.1007/jhep08(2022)0872022-09-15605773Jackson, P. [0000-0002-0847-402X]Kong, A.X.Y. [0000-0001-8063-8765]McDougall, A.E. [0000-0001-7713-2800]Potti, H. [0000-0002-0800-9902]Ruggeri, T.A. [0000-0001-9941-1966]White, M.J. [0000-0001-5474-4580]