Measurement of the relative B±c/B± production cross section with the ATLAS detector at √s = 8 TeV

ATLAS Collaboration

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Abstract

The total cross section and differential cross sections for the production of B±c mesons, times their branching fraction to J/ψπ±, are measured relative to those for the production of B± mesons, times their branching fraction to J/ψK±. The data used for this study correspond to an integrated luminosity of 20.3fb−1 of pp collisions recorded by the ATLAS detector at the Large Hadron Collider in 2012 at a center-of-mass energy of √s = 8 TeV. The measurement is performed differentially in bins of transverse momentum pT for 13 GeV < pT(B±c) < 22 GeV and pT(B±c) > 22 GeV and in bins of rapidity y for |y| < 0.75 and 0.75 < |y| <2.3. The relative cross section times branching fraction for the full range pT > 13 GeV and |y| < 2.3 is (0.34 ± 0.04stat+0.06−0.02 sys ± 0.01lifetime)%. The differential measurements suggest that the production cross section of the B±c decreases faster with pT than the production cross section of the B±, while no significant dependence on rapidity is observed.
Original languageEnglish
Article number012010
Number of pages26
JournalPhysical Review D
Volume104
Issue number1
DOIs
Publication statusPublished - 1 Jul 2021

Bibliographical note

39 pages in total, author list starting page 23, 7 figures, submitted to PRD. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2016-03

Keywords

  • hep-ex

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