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The role of temperature dependent string-inspired CPT violating backgrounds in leptogenesis and the chiral magnetic effect

Research output: Contribution to journalArticle

Original languageEnglish
Article number50
Pages (from-to)1-15
JournalEuropean Physical Journal C
Volume79
Issue number1
Early online date21 Jan 2019
DOIs
Accepted/In press3 Jan 2019
E-pub ahead of print21 Jan 2019
PublishedJan 2019

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Abstract

In a temperature dependent CPT-Violating (CPTV) axial time-like background (induced by the Kalb-Ramond tensor field of string theory) we discuss leptogenesis by solving the Boltzmann equation.The current work non-trivially modifies the framework of a previous phenomenological approach by the authors where the CPTV axial background was considered to be a constant (with no microscopic justification). The constant background approximation though is shown to capture the main phenomenological features of leptogenesis. On comparing our analysis to the related chiral magnetic effect for axial current condensates, we conclude that the Kalb-Ramond field does not play the role of the chiral chemical potential needed for that effect.

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