57 citations · 309 across the 16 of their papers we have counts for
16 papers · 1 filter
Re-visiting the bounds on hydrogen-antihydrogen oscillations from diffuse -ray surveys
Yuval Grossman, Wee Hao Ng, Shamayita Ray
Surveys of diffuse -ray in the interstellar medium (ISM) can be used to probe hydrogen-antihydrogen oscillations, by detecting the -ray emission from antihydrogen annihilatio…
Current status of MSSM Higgs sector with LHC 13 TeV data
Rahool Kumar Barman, Biplob Bhattacherjee, Arghya Choudhury +3
ATLAS and CMS collaborations have reported the results on the Higgs search analyzing fb data from Run-II of LHC at 13 TeV. In this work, we study the Higgs sector…
Potential of a singlet scalar enhanced Standard Model
Swagata Ghosh, Anirban Kundu, Shamayita Ray
We investigate the parameter space of the Standard Model enhanced by a gauge singlet real scalar . Taking into account all the theoretical and experimental constraints, we show…
Rare Z Decays and Neutrino Flavor Universality
Gauthier Durieux, Yuval Grossman, Matthias König +2
We study rare four-body decays of the Z-boson involving at least one neutrino and one charged lepton. Large destructive interferences make these decays very sensitive to the Z coup…
Momentum asymmetries as CP violating observables
Joshua Berger, Monika Blanke, Yuval Grossman +1
Three body decays can exhibit CP violation that arises from interfering diagrams with different orderings of the final state particles. We construct several momentum asymmetry obse…
Optimization of the baseline and the parent muon energy for a low energy neutrino factory
Amol Dighe, Srubabati Goswami, Shamayita Ray
We discuss the optimal setup for a low energy neutrino factory in order to achieve a 5σ-discovery of a nonzero mixing angle θ_{13}, a nonzero CP phase δ_{CP}, and the mass hierarch…
Minimal Lepton Flavor Violation and Renormalization Group Evolution of Lepton Masses and Mixing
Yuval Grossman, Shamayita Ray
We study the renormalization group equations (RGEs) of the neutrino parameters in models of Minimal Lepton Flavor Violation. In such models, the RGEs can be described in terms of f…
Lower Bounds on U_{e3}
Shamayita Ray, Werner Rodejohann, Michael A. Schmidt
We give minimal values for the smallest lepton mixing parameter U_{e3}, applying 2-loop renormalization group equations in an effective theory approach. This is relevant in scenari…
2540 km: Bimagic baseline for neutrino oscillation parameters
Amol Dighe, Srubabati Goswami, Shamayita Ray
We show that a source-to-detector distance of 2540 km offers multiple advantages for a low energy neutrino factory with a detector that can identify muon charge. At this baseline,…
Renormalization group evolution of neutrino masses and mixing in seesaw models: A review
Shamayita Ray
We consider different extensions of the standard model which can give rise to the small active neutrino masses through seesaw mechanisms, and their mixing. These tiny neutrino mass…
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…
Renormalization group evolution of neutrino masses and mixing in the Type-III seesaw mechanism
Joydeep Chakrabortty, Amol Dighe, Srubabati Goswami +1
We consider the standard model extended by heavy right handed fermions transforming as triplets under SU(2), which generate neutrino masses through the Type-III seesaw mechanis…
CP asymmetry in the decays B --> (X_s, X_d) mu+ mu- with four generations
Ashutosh Kumar Alok, Amol Dighe, Shamayita Ray
We estimate the CP asymmetry A_{CP}(q^2) in the decays B --> X_s mu+ mu- and B --> X_d mu+ mu- in the standard model (SM) with an additional fourth generation. We use a parametriza…
Renormalization group evolution of neutrino mixing parameters near and models with vanishing at the high scale
Amol Dighe, Srubabati Goswami, Shamayita Ray
Renormalization group (RG) evolution of the neutrino mass matrix may take the value of the mixing angle very close to zero, or make it vanish. On the other hand, starting…
CPT violation in long baseline neutrino experiments: a three flavor analysis
Amol Dighe, Shamayita Ray
We explore possible signals of CPT violation in neutrinos in the complete three-flavor framework. Employing a systematic expansion in small parameters, we analytically estimate the…
Signatures of heavy sterile neutrinos at long baseline experiments
Amol Dighe, Shamayita Ray
Sterile neutrinos with masses eV or higher would play an important role in astrophysics and cosmology. We explore possible signatures of such sterile neutrinos at long b…