Search for single vector-like quark production in opposite-sign dilepton final states in proton-proton collisions at √(s) = 13 TeV

2026/05/13 by CMS Collaboration · 1 voice
Physics and Astronomy · #hep-ex

paper · pdf

Abstract

A search is presented for single production of a vector-like top quark T, decaying into the standard model top quark and Higgs boson, in a final state including two opposite-sign leptons (electrons or muons), jets, and missing transverse momentum. The data were recorded by the CMS experiment in proton-proton collisions at a center-of-mass energy of 13 TeV at the CERN LHC in the years 2016-2018, and corresponding to an integrated luminosity of up to 138 fb^-1. No excess in data over the background expectations is observed. Upper limits at 95% confidence level on the product of the T production cross section and its decay branching fraction to tH are set, ranging from 2.0 pb at a T mass of 600 GeV to 0.1 pb at 1000 GeV. This is the first search in the T → tH channel in opposite-sign dilepton final states.

Citations

• Performance of the CMS high-level trigger during LHC Run 2
• Development of the CMS detector for the CERN LHC Run 3
• Sensitivity of searches for new signals and its optimization
• Presentation of search results: theCLstechnique
• Review of Particle Physics
• Confidence Level Computation for Combining Searches with Small Statistics

Discussions

• #CMSpaper: Search for single vector-like quark production in opposite-sign dilepton final states in proton-proton collisions at √s = 13 TeV (arXiv:2605.13649) https://arxiv.org/abs/2605.13649 #NewPhys [bsky, 2 points, 0 comments]

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