Single-top production and rare top interactions

PRATISHRUTI SAHA; KEN KIERS; ALEJANDRO SZYNKMAN

PHYSICAL REVIEW D - PARTICLE AND FILDS

American Physical Society

Año: 2018

0556-2821

The study of the top quark?s properties is an important part of the LHC programme. In earlier work, we have studied the rare decay t → b ̄bc, using effective operators to capture the effects of physics beyond the Standard Model. However top decay is primarily sensitive to new physics in the sub-TeV energy regime. If this new physics resides at a higher energy scale, then one needs to turn to single-top production. In this paper, we use the s-channel and t-channel single- top production cross sections to constrain the new physics parameter space associated with such contact interactions. We also study the net top polarization as a means to distinguish between contributions from operators involving different fermion chiralities and Lorentz structures.