Search for single production of a vector-like T quark decaying to a top quark and a Z boson in the final state with jets and missing transverse momentum at $$ \sqrt{s} $$ = 13 TeV

transverse momentum: missing-energy final state: ((n)jet) LHC; CMS; Beyond Standard Model; Hadron-Hadron Scattering; Vector-Like Quarks 13000 GeV-cms QC770-798 Z-бозоны 7. Clean energy quark --> top Z0 quark: vector particle PARTICLE PHYSICS; LARGE HADRON COLLIDER; CMS Physics, Particles & Fields High Energy Physics - Experiment High Energy Physics - Experiment (hep-ex) Particle and Plasma Physics quark --> top Z0 [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] quark: postulated particle decay: width High energy physics ; Experimental particle physics ; LHC ; CMS ; p p: scattering ; p p: colliding beams ; B: decay ; tau: hadronic decay ; interaction: gauge ; interaction: model ; transverse momentum: missing-energy ; new physics: search for ; mass spectrum: transverse ; black hole: quantum ; vector boson: mass ; W': leptonic decay ; sensitivity ; leptoquark: coupling ; CERN LHC Coll ; leptoquark: mass: lower limit ; anomaly ; channel cross section: upper limit ; effective field theory ; Higgs info:eu-repo/classification/ddc/530 hadron-hadron scattering beyond standard mode 0105 Mathematical Physics CMS neutrino: pair production Physics ddc:530 top: hadronic decay Nuclear & Particles Physics charge, 2/3 mass dependence channel cross section: branching ratio: upper limit vector-like quarks CERN LHC Coll Physical Sciences 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics адрон-адронное рассеяние PARTICLE PHYSICS Beyond Standard Model; Hadron-Hadron Scattering; Vector-Like Quarks; branching ratio quark: decay modes transverse momentum, missing-energy Lorentz p p: scattering CERN Lab Стандартная модель Particles & Fields кварки t-кварк quark, mass p p, scattering FOS: Physical sciences Beyond Standard Model; Hadron-Hadron Scattering; Vector-Like Quarks Hadron-hadron scattering 530 Nuclear and particle physics. Atomic energy. Radioactivity TeV Nuclear Vector-like quarks ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика 0206 Quantum Physics quark, production Science & Technology Hadron-Hadron Scattering Vector-Like Quarks hep-ex Molecular LARGE HADRON COLLIDER LHC, CMS, Beyond Standard Model, Hadron-Hadron Scattering, Vector-Like Quarks single production quark: mass width Physics and Astronomy 0202 Atomic Z0: leptonic decay Beyond Standard Model Beyond standard model p p: colliding beams charge: 2/3 quark: production experimental results
DOI: 10.1007/jhep05(2022)093 Publication Date: 2022-05-20T03:31:52Z
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ABSTRACT
Abstract A search is presented for single production of a vector-like T quark with charge 2/3 e, in the decay channel featuring a top quark and a Z boson, with the top quark decaying hadronically and the Z boson decaying to neutrinos. The search uses data collected by the CMS experiment in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 137 fb−1 recorded at the CERN LHC in 2016–2018. The search is sensitive to a T quark mass between 0.6 and 1.8 TeV with decay widths ranging from negligibly small up to 30% of the T quark mass. Reconstruction strategies for the top quark are based on the degree of Lorentz boosting of its final state. At 95% confidence level, the upper limit on the product of the cross section and branching fraction for a T quark of small decay width varies between 15 and 602 fb, depending on its mass. For a T quark with decay widths between 10 and 30% of its mass, this upper limit ranges between 16 and 836 fb. For most of the studied range, the results provide the best limits to date. This is the first search for single T quark production based on the full Run 2 data set of the LHC.
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