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    • Keywords


      Left–right symmetry; neutrino mass; domain walls; supersymmetry; metastable vacua.

    • Abstract


      Unified models incorporating right-handed neutrino in a symmetric way generically possess parity symmetry. If this is broken spontaneously, it results in the formation of domain walls in the early Universe, whose persistence is unwanted. A generic mechanism for the destabilization of such walls is a small pressure difference signalled by difference in free energy across the walls. It is interesting to explore the possibility of such effects in conjunction with the effects that break supersymmetry in a phenomenologically acceptable way. This possibility when realized in the context of several scenarios of supersymmetry breaking, leads to an upper bound on the scale of spontaneous parity breaking, often much lower than the GUT scale. In the left–right symmetric models studied, the upper bound is no higher than 1011 GeV but a scale as low as 105 GeV is acceptable.

    • Author Affiliations


      Urjit A Yajnik1 Anishnu Sarkar2 Sasmita Mishra3 Debasish Borah4

      1. Physics Department, Indian Institute of Technology Bombay, Mumbai 400 076, India
      2. Physics Department, LNM Institute of Information Technology, Post Sumel, Jaipur 302 031, India
      3. Physics Department, NIT Rourkela, Rourkela 769 008, India
      4. Physics Department, Tezpur University, Tezpur 784 028, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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