Leptogenesis and baryon asymmetry in the early Universe for the case arbitrary hypermagnetic helicity

International Conference on Particle Physics and Astrophysics

物理学;天文学

Semikoz, V.B.^1 ; Smirnov, A.Yu.^1,2 ; Sokoloff, D.D.^1,3

Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation (IZMIRAN), Troitsk, Moscow

142190, Russia^1

National University of Science and Technology, MISiS, Moscow

119049, Russia^2

Department of Physics, Moscow State University, Moscow

119999, Russia^3

关键词: Baryon asymmetry;    Early universe;    Electroweak phase transition;    Helicities;    Leptogenesis;    Lepton number;    Sphaleron transitions;    Wash out;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012086/pdf
DOI  :  10.1088/1742-6596/798/1/012086

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We study leptogenesis and baryon asymmetry generation in plasma of the early Universe before the electroweak phase transition (EWPT) accounting for chirality flip processes via inverse Higgs decays and sphaleron transitions which violate the left lepton number and wash out the baryon asymmetry of the Universe (BAU). The hypermagnetic helicity evolution proceeds in a self-consistent way with the lepton asymmetry growth. The hypermagnetic helicity plays a key role in lepto/baryogenesis in our scenario and the more hypermagnetic field is close to the maximum helical one the faster BAU grows up the observable value, Bobs∼ 10-10.