Measurement of B c ( 2 S ) + and B c * ( 2 S ) + cross section ratios in proton-proton collisions at √ s = 13 TeV
Name
PhysRevD.102.092007.pdf
Description
Published version
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482.11 KB
Format
Adobe PDF
Checksum (MD5)
47cdb85f59b1330fd7f6bf2273699a57
Author(s)
Harris, Philip
Date Issued
2020
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Harris, Philip. 2020. "Measurement of B c ( 2 S ) + and B c * ( 2 S ) + cross section ratios in proton-proton collisions at √ s = 13 TeV." Physical Review D, 102 (9).
Version
Final published version
Abstract
© 2020 CERN. The ratios of the Bc(2S)+ to Bc+, Bc∗(2S)+ to Bc+, and Bc∗(2S)+ to Bc(2S)+ production cross sections are measured in proton-proton collisions at s=13 TeV, using a data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 143 fb-1. The three measurements are made in the Bc+ meson phase space region defined by the transverse momentum pT>15 GeV and absolute rapidity |y|<2.4, with the excited Bc(∗)(2S)+ states reconstructed through the Bc(∗)+π+π-, followed by the Bc+→J/ψπ+ and J/ψ→μ+μ- decays. The Bc(2S)+ to Bc+, Bc∗(2S)+ to Bc+, and Bc∗(2S)+ to Bc(2S)+ cross section ratios, including the unknown Bc(∗)(2S)+→Bc(∗)+π+π- branching fractions, are (3.47±0.63(stat)±0.33(syst))%, (4.69±0.71(stat)±0.56(syst))%, and 1.35±0.32(stat)±0.09(syst), respectively. None of these ratios shows a significant dependence on the pT or |y| of the Bc+ meson. The normalized dipion invariant mass distributions from the decays Bc(∗)(2S)+→Bc(∗)+π+π- are also reported.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1103/PHYSREVD.102.092007
