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Determination of the Ratio of b-Quark Fragmentation Fractions f(s)/f(d) in pp Collisions at root s=7 TeV with the ATLAS Detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 2853
2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 115, no 26, 262001Article in journal (Refereed) Published
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Abstract [en]

With an integrated luminosity of 2.47 fb(-1) recorded by the ATLAS experiment at the LHC, the exclusive decays B-s(0) -> J/psi phi and B-d(0) -> J/psi K*(0) of B mesons produced in pp collisions at root s = 7 TeV are used to determine the ratio of fragmentation fractions f(s)/f(d). From the observed B-s(0) -> J/psi phi and B-d(0) -> J/psi K*(0) yields, the quantity (f(s)/f(d))[B(B-s(0) -> J/psi phi)/B(B-d(0) -> J/psi K*(0) )] is measured to be 0.199 +/- 0.004(stat) +/- 0.008(syst). Using a recent theory prediction for [B(B-s(0) -> J/psi phi)/B(B-d(0) -> J/psi K*(0))] yields (f(s)/f(d)) = 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.

Place, publisher, year, edition, pages
American Physical Society , 2015. Vol. 115, no 26, 262001
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Subatomic Physics
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URN: urn:nbn:se:kth:diva-181091DOI: 10.1103/PhysRevLett.115.262001ISI: 000367385200005Scopus ID: 2-s2.0-84953289856OAI: oai:DiVA.org:kth-181091DiVA: diva2:898639
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Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note

QC 20160128

Available from: 2016-01-28 Created: 2016-01-28 Last updated: 2016-02-05Bibliographically approved

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