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.
Highlights
Top quark is the heaviest among all the SM particles.This particle was discovered at the Tevatron-Fermilab by CDF [1] and D0 [2] collaborations
IV, we show the computations of single top production through the t channel at leading order (LO) and next-to-leading order (NLO) both in the SM and the SM augmented by anomalous Wtb coupling
These asymmetries present, except Az, a high sensitivity to the anomalous right tensorial coupling, as it is depicted in Fig. 9, which is weakened at the particle level
Summary
Top quark is the heaviest among all the SM particles. This particle was discovered at the Tevatron-Fermilab by CDF [1] and D0 [2] collaborations. It has a pole mass mt 1⁄4 173.1 Æ 0.6 GeV [3] which is very close to the electroweak symmetry breaking scale. The top quark plays an important role in high energy physics as it is believed that, due its large mass, effects of new physics beyond the SM can be shown [4,5,6]. Top quark is dominantly produced at the LHC, through QCD, in the a cross section approaching one nanobarn at ppaffiiffir s mode with 1⁄4 13 TeV
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