Determination of the ratio of b-quark fragmentation fractions fs/fd in pp collisions at s√=7 TeV with the ATLAS detector

, The ATLAS collaboration (2015) Determination of the ratio of b-quark fragmentation fractions fs/fd in pp collisions at s√=7  TeV with the ATLAS detector. Physical review letters, 115 (26). ISSN 1079-7114

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Abstract

With an integrated luminosity of 2.47  fb−1 recorded by the ATLAS experiment at the LHC, the exclusive decays B0s→J/ψϕ and B0d→J/ψK*0 of B mesons produced in pp collisions at s√=7  TeV are used to determine the ratio of fragmentation fractions fs/fd. From the observed B0s→J/ψϕ and B0d→J/ψK*0 yields, the quantity (fs/fd)[B(B0s→J/ψϕ)/B(B0d→J/ψK*0)] is measured to be 0.199±0.004(stat)±0.008(syst). Using a recent theory prediction for [B(B0s→J/ψϕ)/B(B0d→J/ψK*0)] yields (fs/fd)=0.240±0.004(stat)±0.010(syst)±0.017(th). This result is based on a new approach that provides a significant improvement of the world average.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
78061
Deposited By:
Deposited On:
29 Jan 2016 12:08
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Nov 2020 03:55