Exclusive photon-photon production of muon pairs in proton-proton collisions at sqrt(s) = 7 TeV.

CMS Collaboration

Research output: Contribution to journalArticle

Abstract

A measurement of the exclusive two-photon production of muon pairs in proton-proton collisions at sqrt(s)= 7 TeV, pp to p mu^+ mu^- p, is reported using data corresponding to an integrated luminosity of 40 inverse picobarns. For muon pairs with invariant mass greater than 11.5 GeV, transverse momentum pT(mu) > 4 GeV and pseudorapidity |eta(mu)| <2.1, a fit to the dimuon pt(mu^+ mu^-) distribution results in a measured cross section of sigma(pp to p mu^+ mu^- p) = 3.38 [+0.58 -0.55] (stat.) +/- 0.16 (syst.) +/- 0.14 (lumi.) pb, consistent with the theoretical prediction evaluated with the event generator Lpair. The ratio to the predicted cross section is 0.83 [+0.14-0.13] (stat.) +/- 0.04 (syst.) +/- 0.03 (lumi.). The characteristic distributions of the muon pairs produced via photon-photon fusion, such as the muon acoplanarity, the muon pair invariant mass and transverse momentum agree with those from the theory.
Original languageEnglish
Article number52
Pages (from-to)1-38
Number of pages39
JournalThe Journal of high energy physics
Volume2012
Issue number1
Publication statusPublished - 2012

Keywords

  • muon : pair production
  • cross section : measured
  • photon photon : fusion
  • p p : scattering
  • transverse momentum
  • Monte Carlo
  • rapidity

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