• A S Joshipura

      Articles written in Pramana – Journal of Physics

    • Exact potential minimization for a supergravity model

      A S Joshipura A Mukherjee S K Soni

      More Details Abstract Fulltext PDF

      The low energy effective scalar potential arising from the supergravity model proposed by Nilles, Srednicki and Wyler is minimized exactly. Bounds are derived for the parameters of the theory from the requirement that SU(2) × U(1) be broken at the tree level. These results support earlier approximate results.

    • Interpretation of the recent Kolar events

      A S Joshipura G Rajasekaran V Gupta K V L Sarma

      More Details Abstract Fulltext PDF

      We give plausible interpretations of the unusual events seen in the proton decay detector at Kolar Gold Fields indicating the existence of a massive (≳2GeV) long lived (10−8−10−9s) particle. We show that it is possible to accommodate the particle in the standard model as a fourth generation neutrino, or inE6 grand unified theory as a neutral fermion occurring in27 representation or in supersymmetric theory as a scalar neutrino. However, there is a difficulty in explaining the large production rate for the particle.

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