Study of exclusive two-photon production of $W^+W^-$ in $pp$ collisions at $$\sqrt{s} = 7$$ TeV and constraints on anomalous quartic gauge couplings

Journal Article · Thu Jul 18 00:00:00 EDT 2013 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP07(2013)116· OSTI ID:1347950

Chatrchyan, Serguei

A search for exclusive or quasi-exclusive W⁺W^$$-$$ production by photon-photon interactions, pp → p(*)W⁺W^$$-$$p(*), at 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 momentum p_T(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 p_T distribution is studied for deviations from the standard model. No events are observed with p_T > 100 GeV. Model-independent upper limits are computed and compared to predictions involving anomalous quartic gauge couplings. The limits on the parameters α$$W\atop{0,C}$$/Λ² with a dipole form factor and an energy cutoff Λ_cutoff = 500 GeV are of the order of 10^$$-$$4.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: CMS
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1347950
• Report Number(s): FERMILAB-PUB-13-241-CMS; CMS-FSQ-12-010; CERN-PH-EP-2013-084; arXiv:1305.5596; 1235421
• Journal Information: Journal of High Energy Physics (Online), Vol. 2013, Issue 7; ISSN 1029-8479
• Publisher: Springer Berlin
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS