Next-to-leading order QCD corrections to a heavy resonance production and decay into top quark pair at the LHC

Abstract

We present a complete next-to-leading order (NLO) QCD calculation to a heavy resonance production and decay into a top quark pair at the LHC, where the resonance could be either a Randall-Sundrum (RS) Kaluza-Klein (KK) graviton $G$ or an extra gauge boson $Z^{\prime }$. The complete NLO QCD corrections can enhance the total cross sections by about $80\%-100\%$ and $20\%-40\%$ for the $G$ and the $Z^{\prime }$, respectively, depending on the resonance mass. We also explore in detail the NLO corrections to the polar angle distributions of the top quark, and our results show that the shapes of the NLO distributions can be different from the leading order (LO) ones for the KK graviton. Moreover, we study the NLO corrections to the spin correlations of the top quark pair production via the above process, and find that the corrections are small.

Published version in PRD

References in corpus (14)

• Top-tagging: A Method for Identifying Boosted Hadronic Tops
• Techniques for improved heavy particle searches with jet substructure
• Strategies to Identify Boosted Tops
• The Bulk RS KK-gluon at the LHC
• LHC Signals for Warped Electroweak Neutral Gauge Bosons
• Top pair invariant mass distribution: a window on new physics
• Searching for the Kaluza-Klein Graviton in Bulk RS Models
• Top Quark Pairs at High Invariant Mass - A Model-Independent Discriminator of New Physics at the LHC
• Kaluza--Klein excitations of gauge bosons at the LHC
• Kaluza-Klein Gluons as a Diagnostic of Warped Models
• Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHC
• Searching for t-bar t Resonances at the Large Hadron Collider
• Identification of Extra Neutral Gauge Bosons at the LHC Using b- and t-Quarks
• Soft Gluon Resummation Effects in Single Graviton Production at the CERN Large Hadron Collider in the Randall-Sundrum Model

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• A closer look at the possible CMS signal of a new gauge boson
• Sensitivity to new high-mass states decaying to ttbar at a 100 TeV collider
• A complete next-to-leading order QCD description of resonant $Z^{\prime }$ production and decay into $t\bar{t}$ final states
• Constraints on Randall-Sundrum model from the events of dijet production with QCD next-to-leading order accuracy at the LHC
• NLO QCD Corrections to Graviton Induced Deep Inelastic Scattering