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

Pramana

Ritesh K Singh³  Rohini M Godbole1¹  Saurabh D Raindani² 

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

关键词: Top;    polarization;    anomalous top coupling.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

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 𝛾 𝛾-collider mediated by a heavy Higgs boson.

【 授权许可】

Unknown