One-loop corrections for Higgs-portal dark matter

30th Annual Meeting of the Division of Particles and Fields (DPyC) of the Mexican Physical Society

Arroyo, J. Armando^1 ; Ramos-Sánchez, Saul^1

Instituto de Fisica, Universidad Nacional Autónoma de México, POB 20-364, Cd.Mx., México

01000, Mexico^1

关键词: Annihilation cross sections;    Dark matter;    Dark matter particles;    One-loop corrections;    Parameter spaces;    Tree level;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/761/1/012014/pdf
DOI  :  10.1088/1742-6596/761/1/012014

来源: IOP

【 摘 要 】

Models endowed with Higgs portals can probe into the hidden sectors of particle physics while providing stable dark matter candidates. Previous tree-level computations in such scenarios have shown that experimental bounds constrain dark matter to a very narrow region in parameter space. Aiming at improving the study of the implications of those constraints, we inspect one-loop corrections to the annihilation cross section for scalar dark matter into observable fermions. We find that these loop contributions might be enough to drastically change those results by deforming in about 10% the allowed parameter space for dark matter particles with masses even below 1 TeV. These findings encourage further investigation.