Observation of VVZ production at $$\sqrt{s}$$ = 13 TeV with the ATLAS detector
Journal Article
·
· Physics Letters. B
A search for the production of three massive vector bosons, VVZ(V = W, Z), in proton-proton collisions at $$\sqrt{s}$$ = 13 TeV is performed using data with an integrated luminosity of 140 fb-1 recorded by the ATLAS detector at the Large Hadron Collider. Events produced in the leptonic final states WWZ → ℓvℓvℓℓ (ℓ = e,μ), WZZ → ℓvℓℓℓℓ, ZZZ → ℓℓℓℓℓ, and the semileptonic final states WWZ → qqℓvℓℓ and WZZ → ℓvqqℓℓ, are analysed. The measured cross section for the pp → VVZ process is 660$$^{+93}_{-90}$$(stat.)$$^{+80}_{-81}$$(syst.) fb, and the observed (expected) significance is 6.4 (4.7) standard deviations, representing the observation of VVZ production. In addition, the measured cross section for the pp → WWZ process is 442 ± 94(stat.)$$^{+60}_{-52}$$(syst.) fb, and the observed (expected) significance is 4.4 (3.6) standard deviations, representing evidence of WWZ production. The measured cross sections are consistent with the Standard Model predictions. Constraints on physics beyond the Standard Model are also derived in the effective field theory framework by setting limits on Wilson coefficients for dimension-8 operators describing anomalous quartic gauge boson couplings.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of Michigan, Ann Arbor, MI (United States); Univ. of Oregon, Eugene, OR (United States)
- Sponsoring Organization:
- US Department of Energy; USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Grant/Contract Number:
- AC02-05CH11231; AC02-76SF00515; SC0007859; SC0017996
- OSTI ID:
- 3009063
- Alternate ID(s):
- OSTI ID: 3006861
OSTI ID: 3008147
- Journal Information:
- Physics Letters. B, Journal Name: Physics Letters. B Vol. 866; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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