Search for pair production of excited top quarks in the lepton + jets final state

2013/11/30 by S. Chatrchyan, CMS Collaboration, V. Khachatryan +98 · 1 citation
Physics and Astronomy · #Bottom quark #Branching fraction #Collider Detector at Fermilab #Electron #Excited state #Gluon #High-Energy Particle Collisions Research #Large Hadron Collider #Lepton #Muon #Nuclear physics #Pair production #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Quark #Tevatron #Top quark #hep-ex

paper · pdf · doi:10.1007/jhep06(2014)125

published as JHEP 06 (2014) 125 · Replaced with published version. Added journal reference and DOI

openalex publication_date 2014/06/01 · arxiv created 2014/07/07 · arxiv updated 2014/07/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

A search is performed for pair-produced spin-3/2 excited top quarks (t * t * ), each decaying to a top quark and a gluon. The search uses data collected with the CMS detector from pp collisions at a center-of-mass energy of s = 8 TeV, selecting events that have a single isolated muon or electron, an imbalance in transverse momentum, and at least six jets, of which one must be compatible with originating from the fragmentation of a b quark. The data, corresponding to an integrated luminosity of 19.5 fb -1 , show no significant excess over standard model predictions, and provide a lower limit of 803 GeV at 95% confidence on the mass of the spin-3/2 t * quark in an extension of the Randall-Sundrum model, assuming a 100% branching fraction of its decay into a top quark and a gluon. This is the first search for a spin-3/2 excited top quark performed at the LHC.

Citations

• Review of Particle Physics
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Cited by

• Search for pair production of heavy resonances in final states with a photon and large-radius jets in proton-proton collisions at s = 13 TeV

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