Contribution to a conference proceedings/Internal Report

PUBDB-2015-05492

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Non-relativistic Majorana neutrinos in a thermal bath and leptogenesis

Biondini, S. (Corresponding author)

2014
Deutsches Elektronen-Synchrotron, DESY Hamburg

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Please use a persistent id in citations: doi:10.3204/DESY-PROC-2014-04/13

Report No.: DESY-PROC-2014-04

Abstract: Neutrino oscillations, the evidence of dark matter and the baryon asymmetry in the universe can not be explained by the standard model of particle physics.Majorana fermions enter in many scenarios of physics beyond the standard model. For example,in the simplest leptogenesis framework, heavy Majorana neutrinos are at the origin of the baryon asymmetry. In the strong wash-out regime non-relativistic Majorana neutrinos produce the lepton asymmetry that is partially reprocessed into a baryon asymmetry. Moreover, all the interactions occur in a thermal medium, namely the universe in its early stage. We discuss an effective field theory approach to study the dynamics of non-relativistic Majorana particles in a thermal bath made of standard model particles. In particular, the decay width of Majorana neutrinos and the CP asymmetries are key ingredients for most leptogenesis models. We address the derivation of such quantities at finite temperature. We provide a formalism to calculate the thermal corrections to the CP asymmetry in the case of a hierarchical mass spectrum for heavy Majorana neutrinos.

Keyword(s): neutrino: Majorana ; baryon: asymmetry ; asymmetry: CP ; particle: Majorana ; fermion: Majorana ; neutrino: oscillation ; lepton: asymmetry ; correction: thermal ; mass: hierarchy ; width ; nonrelativistic ; leptogenesis ; effective field theory ; finite temperature ; dark matter

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Contributing Institute(s):

1. LHC/ATLAS Experiment (ATLAS)
2. LHC/CMS Experiment (CMS)
3. Uni Hamburg / Experimentalphysik (UNI/EXP)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. No specific instrument

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Database coverage:

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Book/Proceedings/Internal Report Schmidt, A. (Editor)>Extern* ; Sander, C. (Editor)DESY*
Proceedings, 20th International Conference on Particles and Nuclei (PANIC 14)
2014Panic2014, Panic2014, HamburgHamburg, Germany, 25 Aug 2014 - 29 Aug 20142014-08-252014-08-29 Hamburg : Deutsches Elektronen-Synchrotron, DESY 1-754 (2014) [10.3204/DESY-PROC-2014-04]2014     Files  Fulltext BibTeX | EndNote: XML, Text | RIS

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