Measurement of vector boson scattering and constraints on anomalous quartic couplings from events with four leptons and two jets in proton-proton collisions at √s = 13 TeV

• Main Authors: CMS Collaboration (Author), Abercrombie, Daniel Robert (Contributor), Allen, Brandon Leigh (Contributor), Azzolini, Virginia (Contributor), Barbieri, Richard Alexander (Contributor), Baty, Austin Alan (Contributor), Bi, Ran (Contributor), Brandt, Stephanie Akemi (Contributor), Busza, Wit (Contributor), Cali, Ivan Amos (Contributor), D'Alfonso, Mariarosaria (Contributor), Demiragli, Zeynep (Contributor), Gomez-Ceballos, Guillelmo (Contributor), Goncharov, Maxim (Contributor), Hsu, Dylan George (Contributor), Iiyama, Yutaro (Contributor), Innocenti, Gian Michele (Contributor), Klute, Markus (Contributor), Kovalskyi, Dmytro (Contributor), Lai, Yue Shi (Contributor), Lee, Yen-Jie (Contributor), Levin, Amy Elizabeth (Contributor), Luckey Jr, P David (Contributor), Maier, Benedikt (Contributor), Marini, Andrea Carlo (Contributor), McGinn, Christopher Francis (Contributor), Mironov, Camelia Maria (Contributor), Narayanan, Siddharth Madhavan (Contributor), Niu, Xinmei (Contributor), Paus, Christoph M. E. (Contributor), Roland, Christof E (Contributor), Roland, Gunther M (Contributor), Salfeld-Nebgen, Jakob Maxillian Henry (Contributor), Stephans, George S. F. (Contributor), Tatar, Kaya (Contributor), Velicanu, Dragos Alexandru (Contributor), Wang, Jing (Contributor), Wang, Ta-Wei (Contributor), Wyslouch, Boleslaw (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Nuclear Science and Engineering (Contributor), Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: Elsevier, 2018-11-08T15:14:56Z.
• Subjects: Article
• Online Access: Get fulltext

A measurement of vector boson scattering and constraints on anomalous quartic gauge couplings from events with two Z bosons and two jets are presented. The analysis is based on a data sample of proton-proton collisions at √s = 13 TeV collected with the CMS detector and corresponding to an integrated luminosity of 35.9 fb⁻¹. The search is performed in the fully leptonic final state ZZ→ℓℓℓ'ℓ', where ℓ,ℓ'=e or μ. The electroweak production of two Z bosons in association with two jets is measured with an observed (expected) significance of 2.7 (1.6) standard deviations. A fiducial cross section for the electroweak production is measured to be σEW(pp→ZZjj→ℓℓℓ'ℓ'jj)=0.40[subscript −0.16][superscript +0.21](stat)[subscript −0.09][superscript +0.13](syst) fb, which is consistent with the standard model prediction. Limits on anomalous quartic gauge couplings are determined in terms of the effective field theory operators T0, T1, T2, T8, and T9. This is the first measurement of vector boson scattering in the ZZ channel at the LHC.