Top quark spin correlations in the Randall-Sundrum model at the CERN Large Hadron Collider

Abstract

In the Randall-Sundrum model, we study top-antitop pair production and top spin correlations at the Large Hadron Collider. In addition to the Standard Model processes, there is a new contribution to the top-antitop pair production process mediated by graviton Kaluza-Klein modes in the s-channel. We calculate the density matrix for the top-antitop pair production including the new contribution. With a reasonable parameter choice in the Randall-Sundrum model, we find a sizable deviation of the top-antitop pair production cross section and the top spin correlations from those in the Standard Model. In particular, resonant productions of the graviton Kaluza-Klein modes give rise to a remarkable enhancement of such a deviation.

18 pages, 7 figures, discussion added, typos corrected, references added, version accepted by PRD

Cited by in corpus (19)

• Top pair invariant mass distribution: a window on new physics
• An A4 flavor model for quarks and leptons in warped geometry
• Top production at the Tevatron/LHC and nonstandard, strongly interacting spin one particles
• Minimal Flavor Violation in the Lepton Sector of the Randall-Sundrum Model
• Measurement of ttbar Spin Correlation in ppbar Collisions Using the CDF II Detector at the Tevatron
• Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHC
• High p_T Top Quarks at the Large Hadron Collider
• Diquark Higgs at LHC
• Searching for t-bar t Resonances at the Large Hadron Collider
• Bulk antisymmetric tensor fields in a Randall-Sundrum model
• Breaking down the entire spectrum of spin correlations of a pair of particles involving fermions and gauge bosons
• A Randall-Sundrum scenario with bulk dilaton and torsion
• New angles on top quark decay to a charged Higgs
• Effect of top quark spin on the unparticle couplings in γγ\to t\bar{t}
• Polarization of top quark in vector-like quark decay
• Hadronic Top Quark Polarimetry with ParticleNet
• On two-body and three-body spin correlations in leptonic $t\bar{t}Z$ production and anomalous couplings at the LHC
• Analytical Insights on Hadronic Top Quark Polarimetry
• Top quark and Electroweak measurements at the Tevatron