378 citations · 2.2k across the 61 of their papers we have counts for
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Type I seesaw mechanism for quasi degenerate neutrinos
Anjan S. Joshipura, Ketan M. Patel, Sudhir K. Vempati
We discuss symmetries and scenarios leading to quasi-degenerate neutrinos in type-I seesaw models. The existence of degeneracy in the present approach is not linked to any specific…
Four Generations: SUSY and SUSY Breaking
Rohini M. Godbole, Sudhir K. Vempati, Akin Wingerter
We revisit four generations within the context of supersymmetry. We compute the perturbativity limits for the fourth generation Yukawa couplings and show that if the masses of the…
Maximal mixing as a `sum' of small mixings
Joydeep Chakrabortty, Anjan S. Joshipura, Poonam Mehta +1
In models with two sources of neutrino masses, we look at the possibility of generating maximal/large mixing angles in the total mass matrix, where both the sources have only small…
Results from PAMELA, ATIC and FERMI : Pulsars or Dark Matter ?
Debtosh Chowdhury, Chanda J. Jog, Sudhir K Vempati
It is well known that the dark matter dominates the dynamics of galaxies and clusters of galaxies. Its constituents remain a mystery despite an assiduous search for them over the p…