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33 papers · 1 filter
Large U_{e3} and Tri-bimaximal Mixing
Srubabati Goswami, Serguey Petcov, Shamayita Ray +1
We investigate in a model-independent way to what extent one can perturb tri-bimaximal mixing in order to generate a sizable value of |U_{e3}|, while at the same time keeping solar…
Multiple Spectral Splits of Supernova Neutrinos
Basudeb Dasgupta, Amol Dighe, Georg G. Raffelt +1
Collective oscillations of supernova neutrinos swap the electron neutrino and antineutrino spectra with those of another flavor in certain energy intervals bounded by sharp spectra…
Mixed Neutralino Dark Matter in Nonuniversal Gaugino Mass Models
Utpal Chattopadhyay, Debottam Das, D. P. Roy
We have considered nonuniversal gaugino mass models of supergravity, arising from a mixture of two superfield contributions to the gauge kinetic term, belonging to a singlet and a…
Resolving the Mass Hierarchy with Atmospheric Neutrinos using a Liquid Argon Detector
Raj Gandhi, Pomita Ghoshal, Srubabati Goswami +1
We explore the potential offered by large-mass Liquid Argon detectors for determination of the sign of Delta m_{31}^2, or the neutrino mass hierarchy, through interactions of atmos…
Using Tau Polarization to probe the Stau Co-annihilation Region of mSUGRA Model at LHC
R. M. Godbole, Monoranjan Guchait, D. P. Roy
The mSUGRA model predicts the polarization of the tau coming from the stau to bino decay in the co-annihilation region to be +1. This can be exploited to extract this soft tau sign…
Collective neutrino oscillations in non-spherical geometry
Basudeb Dasgupta, Amol Dighe, Alessandro Mirizzi +1
The rich phenomenology of collective neutrino oscillations has been studied only in one-dimensional or spherically symmetric systems. Motivated by the non-spherical example of coal…