Exclusive diphoton production of dimuon pairs in proton-proton collisions at sqrt(s) = 7 TeV

6 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00644285
Contributor : Sylvie Flores <>
Submitted on : Thursday, November 24, 2011 - 7:41:07 AM
Last modification on : Monday, June 28, 2021 - 3:56:02 PM

Citation

S. Chatrchyan, D. Sillou, M. Besancon, S. Choudhury, M. Dejardin, et al.. Exclusive diphoton production of dimuon pairs in proton-proton collisions at sqrt(s) = 7 TeV. Journal of High Energy Physics, Springer, 2012, 01, pp.052. ⟨10.1007/JHEP01(2012)052⟩. ⟨in2p3-00644285⟩

Record views