Document Type
Article
Publication Title
Journal of High Energy Physics
Abstract
Abstract: A search for exclusive or quasi-exclusive W+W− production by photon-photon interactions, pp → p(∗)W+W−p(∗), at √s = 7 TeV is reported using data collected by the CMS detector with an integrated luminosity of 5.05 fb−1. Events are selected by requiring a µ±e∓ vertex with no additional associated charged tracks and dilepton transverse mo- mentum pT(µ±e∓) > 30 GeV. Two events passing all selection requirements are observed in the data, compared to a standard model expectation of 2.2 ± 0.4 signal events with 0.84 ± 0.15 background. The tail of the dilepton pT distribution is studied for deviations from the standard model. No events are observed with pT > 100 GeV. Model-independent upper limits are computed and compared to predictions involving anomalous quartic gauge couplings. The limits on the parameters aW /Λ2 with a dipole form factor and an energy cutoff Λcutoff = 500 GeV are of the order of 10−4.
DOI
0.1007/JHEP07(2013)116
Publication Date
7-18-2013
Recommended Citation
The CMS collaboration., Chatrchyan, S., Khachatryan, V. et al. Study of exclusive two-photon production of W+W− in pp collisions at √s =7 TeV and constraints on anomalous quartic gauge couplings. J. High Energ. Phys. 2013, 116 (2013). https://doi.org/10.1007/JHEP07(2013)116
