Evidence for electroweak production of four charged leptons and two jets in proton-proton collisions at √s=13 TeV
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1-s2.0-S0370269320307954-main.pdf
Description
Published version
Size
873.53 KB
Format
Adobe PDF
Checksum (MD5)
2be1dc55f57daac59c929e27874981db
Author(s)
Harris, Philip
Date Issued
2021
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publisher
Elsevier BV
Citation
Harris, Philip. 2021. "Evidence for electroweak production of four charged leptons and two jets in proton-proton collisions at √s=13 TeV." Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 812.
Version
Final published version
Abstract
© 2020 The Author(s) Evidence is presented for the electroweak (EW) production of two jets (jj) in association with two Z bosons and constraints on anomalous quartic gauge couplings are set. The analysis is based on a data sample of proton-proton collisions at s=13TeV collected with the CMS detector in 2016–2018, and corresponding to an integrated luminosity of 137fb−1. The search is performed in the fully leptonic final state ZZ→ℓℓℓ′ℓ′, where ℓ,ℓ′=e,μ. The EW production of two jets in association with two Z bosons is measured with an observed (expected) significance of 4.0 (3.5) standard deviations. The cross sections for the EW production are measured in three fiducial volumes and the result is σEW(pp→ZZjj→ℓℓℓ′ℓ′jj)=0.33−0.10+0.11(stat)−0.03+0.04(syst)fb in the most inclusive volume, in agreement with the standard model prediction of 0.275±0.021fb. Measurements of total cross sections for jj production in association with two Z bosons are also reported. Limits on anomalous quartic gauge couplings are derived in terms of the effective field theory operators T0, T1, T2, T8, and T9.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1016/J.PHYSLETB.2020.135992
