106 citations · 402 across the 21 of their papers we have counts for
21 papers
CDF II W-mass anomaly and SO(10) GUT
Purushottam Sahu, Hiranmaya Mishra, Prasanta K. Panigrahi +2
The W-mass anomaly has yet to be established, but a huge proliferation of articles on the subject established the rich potential of such event. We investigate the SO(10) GUT constr…
Testing Violations of Lorentz Invariance with Cosmic Rays
R. Cowsik, T. Madziwa-Nussinov, S. Nussinov +1
Cosmic rays are the highest energy particles available for our study and as such serve as excellent probes of the effects of Lorentz Invariance Violations, which are expected to in…
Thermal leptogenesis in extended supersymmetric seesaw
M. Hirsch, M. Malinsky, J. C. Romao +2
We consider an extended supersymmetric SO(10) seesaw model with only doublet Higgs scalars, in which neutrino masses are suppressed by the scale of D-parity violation. Leptogenesis…
Consequences of neutrinoless double beta decay and WMAP
H. V. Klapdor-Kleingrothaus, U. Sarkar
Observation of the neutrinoless double beta decay ($\0n$) has established that there is lepton number violation in nature and the neutrino masses are Majorana in nature. It also gi…
Neutrinoless double beta decay with scalar bilinears
H. V. Klapdor-Kleingrothaus, U. Sarkar
One possible probe to physics beyond the standard model is to look for scalar bilinears, which couple to two fermions of the standard model. We point out that the scalar bilinears…
Baryon and Lepton Number Violation with Scalar Bilinears
H. V. Klapdor-Kleingrothaus, E. Ma, U. Sarkar
We consider all possible scalar bilinears, which couple to two fermions of the standard model. The various baryon and lepton number violating couplings allowed by these exotic scal…
Neutrino mixing schemes and neutrinoless double beta decay
H. V. Klapdor-Kleingrothaus, U. Sarkar
We study the possible structure of the neutrino mass matrix taking into consideration the solar and atmospheric neutrinos and the neutrinoless double beta decay. We emphasize on ma…
Implications of observed neutrinoless double beta decay
H. V. Klapdor-Kleingrothaus, U. Sarkar
Recently a positive indication of the neutrinoless double beta decay has been announced. We study the implications of this result taking into consideration earlier results on atmos…
Majorana neutrinos with split fermions in extra dimensions
H. V. Klapdor-Kleingrothaus, U. Sarkar
We propose new solutions to the neutrino mass problem in theories with large extra dimensions in a thick wall scenario. It has recently been argued that our 3-brane could be a thic…
Verifiable Model of Neutrino Masses from Large Extra Dimensions
Ernest Ma, Martti Raidal, Utpal Sarkar
We propose a new scenario of neutrino masses with a Higgs triplet in a theory of large extra dimensions. Lepton number violation in a distant brane acts as the s…
Effects of quantum space time foam in the neutrino sector
H. V. Klapdor-Kleingrothaus, H. Päs, U. Sarkar
We discuss violations of CPT and quantum mechanics due to interactions of neutrinos with space-time quantum foam. Neutrinoless double beta decay and oscillations of neutrinos from…
Confronting Dilaton-exchange gravity with experiments
H. V. Klapdor-Kleingrothaus, H. Päs, U. Sarkar
We study the experimental constraints on theories, where the equivalence principle is violated by dilaton-exchange contributions to the usual graviton-exchange gravity. We point ou…
Effects of New Gravitational Interactions on Neutrinoless Double Beta Decay
H. V. Klapdor--Kleingrothaus, H. Päs, U. Sarkar
It has recently been proposed that violations of Lorentz invariance or violations of the equivalence principle can be constrained from the non-observation of neutrinoless double be…
Test of Special Relativity and Equivalence Principle from Neutrinoless Double Beta Decay
H. V. Klapdor--Kleingrothaus, H. Päs, U. Sarkar
We generalize the formalism for testing Lorentz invariance and the equivalence principle in the neutrino sector. While neutrino oscillation bounds constrain the region of large mix…
Scale of Leptogenesis
Jacqueline Faridani, Smaragda Lola, Patrick J. O'Donnell +1
We study the scale at which one can generate the lepton asymmetry of the universe which could then get converted to a baryon asymmetry during the electroweak phase transition. We c…
Baryon and Lepton Number Assignment in Models
Emmanuel A. Paschos, Utpal Sarkar, Hiroto So
In models there are new particles whose baryon number is not uniquely assigned. We point out that the baryon and lepton number assignment to these particles can change the ba…
Corrections to mass scale predictions in SO(10) GUT with higher dimensional operators
Alakabha Datta, Sandip Pakvasa, Utpal Sarkar
We calculate the two loop contribution to the predictions of the mass scales in an SO(10) grand unified theory. We consider the modified unification scale boundary conditions due t…
Proton Decay and Related Processes in Unified Models with Gauged Baryon Number:
Palash B. Pal, Utpal Sarkar
In unification models based on SU(15) or SU(16), baryon number is part of the gauge symmetry, broken spontaneously. In such models, we discuss various scenarios of important baryon…
Baryogenesis via lepton number violating scalar interactions
Patrick J. O'Donnell, Utpal Sarkar
We study baryogenesis through lepton number violation in left-right symmetric models. In these models the lepton number and CP violating interactions of the triplet higgs scalars c…
Non-perturbative unification in the light of LEP results
B. Brahmachari, U. Sarkar, K. Sridhar
We consider an alternative to conventional GUTs originally proposed by Maiani, Parisi and Petronzio, where owing to the existence of extra fermion generations at some intermediate…
Neutrinoless Double Beta Decay and CP Violation
Patrick J. O'Donnell, Utpal Sarkar
We study the relation between the Majorana neutrino mass matrices and the neutrinoless double beta decay when CP is not conserved. We give an explicit form of the decay rate in ter…