Single top quark production cross section at hadron colliders

TL;DR

This work delivers NNLL-resummed, approximate NNLO predictions for single top quark production in the $s$-channel and in association with a $W$ boson or a charged Higgs, using MSTW2008 NNLO PDFs. By incorporating two-loop soft anomalous dimensions, it shows that soft-gluon corrections substantially enhance NLO cross sections across Tevatron and LHC energies, with specific NNLOapprox gains of ~13% for the $s$-channel at the LHC and ~8% for $tW^-$ production. The results provide precise cross sections for SM processes and for SUSY-relevant charged-Higgs production, highlighting the importance of higher-order QCD effects in phenomenology and experimental analyses. Overall, the study improves theoretical precision for key single-top channels at hadron colliders and informs future measurements and searches in both SM and beyond-SM scenarios.

Abstract

I present results for the theoretical cross section of single top quark production in the s channel and also via associated production with a W boson or a charged Higgs. The calculations include higher-order corrections at NNLL accuracy. Detailed numerical results are provided for Tevatron and LHC energies.

Figures (4)

• Figure 1: Cross section (left) and $K$ factor (right) for $s$-channel single top quark production at the Tevatron.
• Figure 2: Cross section for $s$-channel single top quark production at the LHC versus mass (left) and energy (right).
• Figure 3: Cross section for $s$-channel single antitop production at the LHC vs mass (left) and energy (right).
• Figure 4: Cross section for $tW^-$ (left) and $tH^-$ (right) production at the LHC.