Programme

P.74 -- Poster, VCTP-46

Date: Wednesday, 6 October 2021

Time: 08:30 - 10:00

Exact one-loop contributions to the decay $H\rightarrow \nu_l\bar{\nu}_l\gamma$

Khiem Hong Phan (*) , Dzung Tri Tran (**) and Le Tho Hue (***)

(*) Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 700000, Vietnam Faculty of Natural Sciences, Duy Tan University, Da Nang City 550000, Vietnam (**) University of Science Ho Chi Minh City, 227 Nguyen Van Cu, District 5, HCM City, Vietnam - Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, HCM City, Vietnam (***) Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam

Exact one-loop contributions to the decay $H\rightarrow \nu_l\bar{\nu}_l\gamma$ with $l=e, \mu, \tau$ within standard model framework are presented in this paper. The computations are checked numerically by verifying ward identity and confirming the ultraviolet finiteness of the results. We find that the results satisfy ward identity and are good stability with varying ultraviolet cutoff parameter. Analytic results for form factors of the decay processes are then expressed in terms of Passarino-Veltman coefficient functions which they can be evaluated numerically by using package {\tt LoopTools}. In phenomenological results, we studied the partial decay widths for the decay channels in both cases of the detected photon and invisible photon. Differential decay widths are also generated as a function of energy of final photon.

Presenter: Trần Trí Dũng