A search is described for the production of a pair of bottom-type vectorlike quarks (Formula Presented VLQs) with mass greater than 1000 GeV. Each Formula Presented VLQ decays into a Formula Presented quark and a Higgs boson, a Formula Presented quark and a Formula Presented boson, or a Formula Presented quark and a Formula Presented boson. This analysis considers both fully hadronic final states and those containing a charged lepton pair from a Formula Presented boson decay. The products of the Formula Presented boson decay and of the hadronic Formula Presented or Formula Presented boson decays can be resolved as two distinct jets or merged into a single jet, so the final states are classified by the number of reconstructed jets. The analysis uses data corresponding to an integrated luminosity of Formula Presented collected in proton-proton collisions at Formula Presented with the CMS detector at the LHC from 2016 to 2018. No excess over the expected background is observed. Lower limits are set on the Formula Presented VLQ mass at the 95% confidence level. These depend on the Formula Presented VLQ branching fractions and are 1570 and 1540 GeV for 100% Formula Presented and 100% Formula Presented, respectively. In most cases, the mass limits obtained exceed previous limits by at least 100 GeV.

Search for bottom-type vectorlike quark pair production in dileptonic and fully hadronic final states in proton-proton collisions at s=13  TeV

Bruschini, D.;
2024

Abstract

A search is described for the production of a pair of bottom-type vectorlike quarks (Formula Presented VLQs) with mass greater than 1000 GeV. Each Formula Presented VLQ decays into a Formula Presented quark and a Higgs boson, a Formula Presented quark and a Formula Presented boson, or a Formula Presented quark and a Formula Presented boson. This analysis considers both fully hadronic final states and those containing a charged lepton pair from a Formula Presented boson decay. The products of the Formula Presented boson decay and of the hadronic Formula Presented or Formula Presented boson decays can be resolved as two distinct jets or merged into a single jet, so the final states are classified by the number of reconstructed jets. The analysis uses data corresponding to an integrated luminosity of Formula Presented collected in proton-proton collisions at Formula Presented with the CMS detector at the LHC from 2016 to 2018. No excess over the expected background is observed. Lower limits are set on the Formula Presented VLQ mass at the 95% confidence level. These depend on the Formula Presented VLQ branching fractions and are 1570 and 1540 GeV for 100% Formula Presented and 100% Formula Presented, respectively. In most cases, the mass limits obtained exceed previous limits by at least 100 GeV.
2024
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
   Advanced Multi-Variate Analysis for New Physics Searches at the LHC
   AMVA4NewPhysics
   European Commission
   Horizon 2020 Framework Programme
   675440

   Search for Higgs bosons decaying to charm quarks
   HIGCC
   European Commission
   Horizon 2020 Framework Programme
   724704

   Direct and indirect searches for new physics in events with top quarks using LHC proton-proton collisions at the CMS detector
   LHCTOPVLQ
   European Commission
   Horizon 2020 Framework Programme
   752730

   Majorana neutrino discovery strategy with CMS
   MajorNet
   European Commission
   Horizon 2020 Framework Programme
   758316

   International Training Network for Statistics in High Energy Physics and Society
   INSIGHTS
   European Commission
   Horizon 2020 Framework Programme
   765710

   The strong interaction at the frontier of knowledge: fundamental research and applications
   STRONG-2020
   European Commission
   Horizon 2020 Framework Programme
   824093

   International, Interdisciplinary & Intersectoral Postdoctoral Fellowships at the Paul Scherrer Institut
   PSI-FELLOW-III-3i
   European Commission
   Horizon 2020 Framework Programme
   884104

   Quantum Universe
   Deutsche Forschungsgemeinschaft
   Exzellenzcluster (ExStra)
   390833306
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/154866
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