Leptogenesis via hypermagnetic fields and baryon asymmetry

Details Leptogenesis via hypermagnetic fields and baryon asymmetry Leptogenesis via hypermagnetic fields and baryon asymmetry

2011-11-29

arxiv.org/abs/1111.6876v2

JCAP02(2012)040

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 2 eps figures, JCAP LaTeX style; Introduction was rewritten, some references are added; version published in JCAP

Scientific paper

10.1088/1475-7516/2012/02/040

We study baryon asymmetry generation originated from the leptogenesis in the presence of hypermagnetic fields in the early Universe plasma before the electroweak phase transition (EWPT). For the simplest Chern-Simons (CS) wave configuration of hypermagnetic field we find the baryon asymmetry growth when the hypermagnetic field value changes due to alpha^2-dynamo and the lepton asymmetry rises due to the Abelian anomaly. We solve the corresponding integro-differential equations for the lepton asymmetries describing such self-consistent dynamics for lepto- and baryogenesis in the two scenarios : (i) when a primordial lepton asymmetry sits in right electrons e_R; and (ii) when, in addition to e_R, a left lepton asymmetry for e_L and nu_eL arises due to chirality flip reactions provided by inverse Higgs decays at the temperatures, T

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