One-loop QCD correction to top pair production in the littlest Higgs model with T-parity at the LHC

TL;DR

This paper calculates one-loop QCD corrections to top pair production in the littlest Higgs model with T-parity at the LHC, revealing small but notable deviations in cross sections and spin correlations.

Contribution

It provides the first detailed calculation of one-loop QCD corrections to top pair production within this specific new physics model at LHC energies.

Findings

Relative correction to cross section up to -0.35%.

Top-antitop spin correlation correction up to 2%.

Corrections are significant in the model's parameter space.

Abstract

In this work, we investigate the one-loop QCD correction to top pair production in the littlest Higgs model with T-parity at the LHC. We calculate the relative correction of the top pair production cross section and top-antitop spin correlation at the LHC for $\sqrt{s}=8,14$ TeV. We find that the relative corrections of top pair production cross section can reach about $-0.35\%$, and the top-antitop spin correlation can reach $1.7\%$($2\%$) at the 8(14) TeV LHC in the favorable parameter space.