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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/062/03/0775-0778

    • Keywords

       

      Neutrino asymmetry; rotating black hole; CPT violation

    • Abstract

       

      Propagation of fermion in curved space-time generates gravitational interaction due to the coupling between spin of the fermion and space-time curvature. This gravitational interaction appears as a CPT violating term in the Lagrangian. It is seen that this space-time interaction can generate neutrino asymmetry in the Universe. If the background metric is spherically asymmetric, say, of a rotating black hole, this interaction is non-zero, thus the net difference to the number density of the neutrino and anti-neutrino is non-zero.

    • Author Affiliations

       

      Banibrata Mukhopadhyay1 Parampreet Singh1

      1. Inter-University Centre for Astronomy and Astrophysics, Ganeshkhind, Post Bag 4, Pune - 411 007, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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