Search for bottom-type, vectorlike quark pair production in a fully hadronic final state in proton-proton collisions at √ s = 13 TeV
Name
PhysRevD.102.112004.pdf
Description
Published version
Size
1.63 MB
Format
Adobe PDF
Checksum (MD5)
6ba36cb090b136b1b276a0d1830a0cbd
Author(s)
Harris, Philip
Date Issued
2020
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Harris, Philip. 2020. "Search for bottom-type, vectorlike quark pair production in a fully hadronic final state in proton-proton collisions at √ s = 13 TeV." Physical Review D, 102 (11).
Version
Final published version
Abstract
© 2020 CERN. A search is described for the production of a pair of bottom-type vectorlike quarks (VLQs), each decaying into a b or b¯ quark and either a Higgs or a Z boson, with a mass greater than 1000 GeV. The analysis is based on data from proton-proton collisions at a 13 TeV center-of-mass energy recorded at the CERN LHC, corresponding to a total integrated luminosity of 137 fb-1. As the predominant decay modes of the Higgs and Z bosons are to a pair of quarks, the analysis focuses on final states consisting of jets resulting from the six quarks produced in the events. Since the two jets produced in the decay of a highly Lorentz-boosted Higgs or Z boson can merge to form a single jet, nine independent analyses are performed, categorized by the number of observed jets and the reconstructed event mode. No signal in excess of the expected background is observed. Lower limits are set on the VLQ mass at 95% confidence level equal to 1570 GeV in the case where the VLQ decays exclusively to a b quark and a Higgs boson, 1390 GeV for when it decays exclusively to a b quark and a Z boson, and 1450 GeV for when it decays equally in these two modes. These limits represent significant improvements over the previously published VLQ limits.
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/10.1103/PHYSREVD.102.112004
