• Lepton distribution in top decay: A probe of new physics and top-polarization

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/069/05/0915-0919

• # Keywords

Top; polarization; anomalous top coupling.

• # Abstract

We investigate the possibilities of studying new physics in various processes of 𝑡-quark production using kinematical distributions of the secondary lepton coming from decay of 𝑡 quarks. We show that the angular distributions of the secondary lepton are insensitive to the anomalous $tbW$ vertex and hence are pure probes of new physics in a generic process of 𝑡-quark production. The effects of 𝑡 polarization on the distributions of the decay lepton are demonstrated for top-pair production process at a $\gamma \gamma$-collider mediated by a heavy Higgs boson.

• # Author Affiliations

1. Center for High Energy Physics, Indian Institute of Science, Bangalore 560 012, India
2. Physical Research Laboratory, Ahmedabad 380 009, India
3. Laboratoire de Physique Théoretique, 91405 Orsay Cedex, France

• # Pramana – Journal of Physics

Current Issue
Volume 93 | Issue 6
December 2019

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019