Flavour-changing neutral currents in models with extra ð?‘?' boson

Pramana

L Maharana2²  S Sahoo1¹ 

[1]Department of Physics, National Institute of Technology, Durgapur 713 209, India$$

[2]Department of Physics, Utkal University, Bhubaneswar 751 004, India$$

关键词: Standard model;    flavour-changing neutral currents;    ð?‘?' gauge boson;    ð??¸6 model.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

New neutral gauge bosons 𝑍' are the features of many models addressing the physics beyond the standard model. Together with the existence of new neutral gauge bosons, models based on extended gauge groups (rank > 4) often predict new charged fermions also. A mixing of the known fermions with new states, with exotic weak-isospin assignments (left-handed singlets and right-handed doublets) will induce tree-level flavour-changing neutral interactions mediated by 𝑍 exchange, while if the mixing is only with new states with ordinary weak-isospin assignments, the flavour-changing neutral currents are mainly due to the exchange of the new neutral gauge boson 𝑍'. We review flavour-changing neutral currents in models with extra 𝑍' boson. Then we discuss some flavour-changing processes forbidden in the standard model and new contributions to standard model processes.

【 授权许可】

Unknown