Υ cross section in p+p collisions at √s=200 GeV
Name
Abelev-2010-gamma cross section.pdf
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730.5 KB
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Checksum (MD5)
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Author(s)
Balewski, Jan T.
Betancourt, Michael Joseph
Corliss, Ross Cameron
Hays-Wehle, James Prewitt
Jones, Christopher LaDon
Kocoloski, Adam Philip
Leight, William Axel
Sakuma, Tai
Seele, Joseph Patrick
Surrow, Bernd
Date Issued
July 2010
Journal
Physical review D
Publisher
American Physical Society
Citation
Abelev, B. et al. “Υ cross section in p+p collisions at sqrt[s]=200 GeV.” Physical Review D 82.1 (2010): n. pag. © 2010 The American Physical Society
Version
Final published version
Abstract
We report on a measurement of the Υ(1S+2S+3S)→e+e- cross section at midrapidity in p+p collisions at √s=200 GeV. We find the cross section to be 114±38(stat+fit)-24+23(syst) pb. Perturbative QCD calculations at next-to-leading order in the color evaporation model are in agreement with our measurement, while calculations in the color singlet model underestimate it by 2σ [sigma]. Our result is consistent with the trend seen in world data as a function of the center-of-mass energy of the collision and extends the availability of Υ data to RHIC energies. The dielectron continuum in the invariant-mass range near the Υ is also studied to obtain a combined yield of e+e- pairs from the sum of the Drell-Yan process and b-b̅ production.
MIT Department
Bates Linear Accelerator Center
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.82.012004
