Duric, S. (2013) Diboson studies at CMS. Il nuovo cimento C, 36 (6). pp. 236-242. ISSN 1826-9885
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Abstract
Measurements of diboson processes in proton-proton collisions at √s = 7TeV and 8TeV with the CMS experiment at the LHC are summarized. Inclusive cross section measurements are performed in the leptonic decay modes ZZ → 2l2l', Wγ → lνγ, Zγ → llγ, Zγ → ννγ, W+W− → lνlν, and the semileptonic decay mode WW + WZ → lνjj, where l = e, μ and l' = e, μ, τ . Cross section for ZZ (W+W−) production is measured at √s = 7TeV and 8TeV using data corresponding to an integrated luminosity of 5.0 fb−1 (4.9 fb−1) and 5.3 fb−1 (3.5 fb−1√ ), respectively. Production of Wγ, Zγ, Zγ, and WW+WZ are measured at √s = 7TeV using data of 5.0 fb−1. A search for exclusive or quasi-exclusive W+W− production by two-photon exchange in the leptonic decay mode WW → eνμν, at √s = 7TeV is performed using data of 5.0 fb−1. All measured cross sections are in agreement with NLO expectations. Inclusive diboson channels are used to extract upper limits on anomalous WWγ, WWZ, ZZγ, Zγγ, ZZZ trilinear gauge couplings. Limits on charged couplings are competitive to limits provided by previous experiments while neutral couplings limits are few times more precise. Exclusive W+W− channel is used to extract the limits on anomalous γγWW quartic gauge coupling, set at the LHC for the first time and resulting in the sensitivity two orders of magnitude better then limits provided by LEP experiments.
| Item Type: | Article |
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| Uncontrolled Keywords: | W bosons ; Z bosons ; Photons |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 07 May 2020 16:19 |
| Last Modified: | 07 May 2020 16:19 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/18401 |
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