Abstract
The first observation is reported of the combined production of three massive gauge bosons ( with , ) in proton-proton collisions at a center-of-mass energy of 13 TeV. The analysis is based on a data sample recorded by the CMS experiment at the CERN LHC corresponding to an integrated luminosity of . The searches for individual , , , and production are performed in final states with three, four, five, and six leptons (electrons or muons), or with two same-sign leptons plus one or two jets. The observed (expected) significance of the combined production signal is 5.7 (5.9) standard deviations and the corresponding measured cross section relative to the standard model prediction is . The significances of the individual and production are 3.3 and 3.4 standard deviations, respectively. Measured production cross sections for the individual triboson processes are also reported.
- Received 19 June 2020
- Accepted 24 August 2020
DOI:https://doi.org/10.1103/PhysRevLett.125.151802
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
© 2020 CERN, for the CMS Collaboration
Physics Subject Headings (PhySH)
synopsis
Hat Trick Observation for Bosons
Published 5 October 2020
The CMS Collaboration confirms that certain particle-smashing events produce three massive bosons.
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