Effect of spin-3/2 top quark excitation on ttbar production at the LHC
arXiv:1110.1565 · doi:10.1007/JHEP01(2012)055
Abstract
A spin-3/2 top quark excitation originating in string realisations of the RS scenario has an effect on the production of top-antitop pairs in hadron-hadron collisions. We study the additional contribution of this state to the cross section for the LHC. We comment on the prospect of discovery or exclusion for a range of masses and couplings at both 7 and 14 TeV and show that the reach extends significantly with increasing centre-of-mass energy. Results are compared with the effect of a hypothetical spin-1/2 excited top as well as other BSM scenarios which predict the presence of higher dimension effective operators. We also calculate distributions for several observables which can be used to distinguish between the different scenarios in the presence of a deviation from the SM prediction for the ttbar cross section.
22 pages, 26 figures
References in corpus (18)
- Parton distributions for the LHC
- Measuring the running top-quark mass
- Updated predictions for the total production cross sections of top and of heavier quark pairs at the Tevatron and at the LHC
- Next-to-next-to-leading soft-gluon corrections for the top quark cross section and transverse momentum distribution
- The theoretical top quark cross section at the Tevatron and the LHC
- Top pair invariant mass distribution: a window on new physics
- Top Quark Pairs at High Invariant Mass - A Model-Independent Discriminator of New Physics at the LHC
- Manifestations of Top Compositeness at Colliders
- Measurement of the t t-bar Production Cross Section in pp Collisions at 7 TeV in Lepton + Jets Events Using b-quark Jet Identification
- Measurement of the top quark pair production cross section in pp collisions at sqrt(s) = 7 TeV in dilepton final states with ATLAS
- Search for the Production of Narrow tb Resonances in 1.9 fb-1 of ppbar Collisions at sqrt(s) = 1.96 TeV
- LanHEP - a package for automatic generation of Feynman rules from the Lagrangian. Updated version 3.1
- Search for ttbar resonances in the lepton plus jets final state in ppbar collisions at sqrt{s}=1.96TeV
- Top-quark production and QCD
- On the possibility of light string resonances at the LHC and Tevatron from Randall-Sundrum throats
- Search for excited spin-3/2 and spin-1/2 leptons at linear colliders
- Review of Properties of the Top Quark from Measurements at the Tevatron
- A Search for ttbar Resonances in the Dilepton Channel in 1.04 fb^-1 of pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment
Cited by in corpus (9)
- Simulating spin-3/2 particles at colliders
- Shedding Light on Top Partner at the LHC
- Comprehensive Constraints on a Spin-3/2 Singlet Particle as a Dark Matter Candidate
- Search for pair production of excited top quarks in the lepton+jets final state
- Search for pair production of excited top quarks in the lepton + jets final state
- Search for spin-3/2 quarks at the Large Hadron Collider
- Higher-spin particles at high-energy colliders
- Determining Top Quark Couplings at the LHC: Snowmass White Paper
- Neutrino specific spin-3/2 dark matter