Determination of the ratio of b -quark fragmentation fractions f s /f d in pp collisions at √s =7 TeV with the ATLAS detector
Publisher DOI
Abstract
With an integrated luminosity of 2.47 fb⁻¹ recorded by the ATLAS experiment at the LHC, the exclusive decays B 0 s →J/ψϕ and B 0 d →J/ψK ∗0 of B mesons produced in pp collisions at √s=7 TeV are used to determine the ratio of fragmentation fractions f s /f d . From the observed B 0 s →J/ψϕ and B 0 d →J/ψK ∗0 yields, the quantity f s f d B(B 0 s →J/ψϕ)B(B 0 d →J/ψK ∗0 ) is measured to be 0.199 ± 0.004(stat) ± 0.008(sys). Using a recent theory prediction for B(B 0 s →J/ψϕ)B(B 0 d →J/ψK ∗0 ) yields f s f d = 0.240 ± 0.004(stat) ± 0.010(sys) ± 0.017(th). This result is based on a new approach that provides a significant improvement of the world average.
Date Issued
2015
Publication Type
Article
Subject(s)
Language(s)
en
Author(s)
ATLAS, Collaboration | |
Kabana, Sonja |
Journal
Physical review letters
Publisher
American Physical Society
ISSN
0031-9007
Access(Rights)
open.access