Probing anomalous $Wtb$ couplings at the LHC in single top quark production through $t$-channel

Abstract

We study the sensitivity of certain observables to the anomalous right tensorial coupling in single top production at the LHC at $\sqrt{s}=13\text{ TeV}$. The observables consist of asymmetries constructed from the energy and angles of the decay products of the top quark produced in single top production through $t$-channel. The computation is done at Leading Order (LO) and Next-to-Leading Order (NLO) in the strong coupling in the $5$ flavor scheme. We have estimated projected limits on the anomalous coupling, both at the parton level without cuts and at the particle level with cuts. We find that the asymmetries are robust with respect to the higher order QCD corrections and are indeed a very good probe of this anomalous coupling of the top. Hence they can be used as experimental probes of the same.

30 pages, 9 figures and 8 tables. References added and discussion is slightly modified

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• Effective operators in $t$-channel single top production and decay
• Effective field theory and scalar extensions of the top quark sector
• Boosted Top quark polarization
• Top quark polarization as a probe of charged Higgs bosons
• Transverse Momentum Resummation for $s$-channel single top quark production at the LHC
• Constraining New Physics with Single Top production at LHC
• Searching for Heavy Charged Higgs Bosons through Top Quark Polarization
• Top polarisation as a probe of CP-mixing top-Higgs coupling in $tjh$ signals
• The anomalous $Wtb$ vertex and top-pair production at the LHC
• Probing effective operators in single top quark production in association with a lepton-neutrino pair
• Why the angular distribution of the top decay lepton is unchanged by anomalous $tbW$ coupling
• Analyzing polarized boosted top from stop decay at high luminosity and high energy LHC