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

Thomas Bossingham, Nick E. Mavromatos*, Sarben Sarkar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)
123 Downloads (Pure)

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.

Original languageEnglish
Article number50
Pages (from-to)1-15
JournalEuropean Physical Journal C
Volume79
Issue number1
Early online date21 Jan 2019
DOIs
Publication statusPublished - Jan 2019

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