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## Open Access item Exclusive γγ → μ+μ− production in proton-proton collisions at Ös = 7 \sqrt {s} = {7} TeV

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Issue Date:2012
Publisher:Springer
Citation:Journal of High Energy Physics 2012: 52 (2012)
Abstract:A measurement of the exclusive two-photon production of muon pairs in proton-proton collisions at Ös = 7 \sqrt {s} = {7} TeV, pp → pμ + μ −p, is reported using data corresponding to an integrated luminosity of 40 pb−1. For muon pairs with invariant mass greater than 11.5 GeV, transverse momentum p T (μ) > 4 GeV and pseudorapidity |η(μ)| < 2.1, a fit to the dimuon p T (μ + μ −) distribution results in a measured cross section of σ(p → pμ + μ −p) = 3.38 - 0.55 + 0.58 {3}.{38}_{{ - 0.{55}}}^{{ + 0.58}} (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 - 0.13 + 0.58 0.{83}_{{ - 0.{13}}}^{{ + 0.58}} (stat.) ± 0.04 (syst.) ± 0.03 (lumi.). The characteristic distributions of the muon pairs produced via γγ fusion, such as the muon acoplanarity, the muon pair invariant mass and transverse momentum agree with those from the theory.
Description:Open Access.-- Chatrchyan, S. et al.
Publisher version (URL):http://dx.doi.org/10.1007/JHEP01(2012)052
URI:http://hdl.handle.net/10261/51923
Identifiers:doi: 10.1007/JHEP01(2012)052
e-issn: 1126-6708
Appears in Collections:(IFCA) Artículos