Upsilon production cross section in pp collisions at √s=7 TeV
Name
Khachatryan-2011-Upsilon production c.pdf
Size
1.19 MB
Format
Adobe PDF
Checksum (MD5)
a0469a00c138e6b06ae645d926795a5e
Date Issued
October 5, 2011
June 2011
Journal
Physical Review D
Publisher
American Physical Society
Citation
V. Khachatryan et al. (CMS Collaboration) "Upsilon production cross section in pp collisions at √s=7 TeV" Phys. Rev. D 83, 112004 (2011)
Version
Final published version
Abstract
The Υ(1S), Υ(2S), and Υ(3S) production cross sections in proton-proton collisions at √s=7 TeV are measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1±0.3 pb-1. Integrated over the rapidity range |y|<2, we find the product of the Υ(1S) production cross section and branching fraction to dimuons to be σ(pp→Υ(1S)X)·B(Υ(1S)→μ+μ-)=7.37±0.13-0.42+0.61±0.81 nb, where the first uncertainty is statistical, the second is systematic, and the third is associated with the estimation of the integrated luminosity of the data sample. This cross section is obtained assuming unpolarized Υ(1S) production. With the assumption of fully transverse or fully longitudinal production polarization, the measured cross section changes by about 20%. We also report the measurement of the Υ(1S), Υ(2S), and Υ(3S) differential cross sections as a function of transverse momentum and rapidity.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.83.112004
