79 citations · 800 across the 51 of their papers we have counts for
47 papers · 1 filter
Heavy flavour production in the presence of a weak magnetic field
Sudeep Saha, Sandeep Chatterjee, Ujjal Kumar Dey +2
We calculate an analytic expression for the cross section, up to order , for heavy quark () production of mass through the gluon () fusion process $g+g \to Q+\b…
Gravitational lensing of neutrinos through the lens of decoherence
Bikash Kumar Acharya, Ujjal Kumar Dey
We propose a new source of neutrino decoherence arising from stochastic gravitational lensing by unresolved mass substructure. Unlike traditional models that treat the lensing pote…
Enlightening dark moments of neutrino with superradiance
Indra Kumar Banerjee, Ujjal Kumar Dey, Anna John
Neutrinos can acquire electromagnetic moments either within the Standard Model through higher order radiative corrections or within the domain of new physics. In this study we focu…
Stodolsky effect in the framework of Generalised Neutrino Interactions
Siddhartha Bandyopadhyay, Ujjal Kumar Dey
We study the Stodolsky effect utilizing the most general form of neutrino interactions with electrons below the electroweak scale by considering all possible Lorentz invariant oper…
Mini-review on the production of Primordial Black Holes from First-Order Phase Transitions in the Early Universe
Indra Kumar Banerjee, Ujjal Kumar Dey, Shaaban Khalil
We review the creation mechanism of primordial black holes from first order phase transitions. We discuss various model-dependent and independent mechanisms and relate the properti…
Radiative symmetry breaking in a gauged Zee-Babu model and its gravitational wave imprints
Indra Kumar Banerjee, Nabarun Chakrabarty, Ujjal Kumar Dey
We construct a classically scale invariant version of the Zee-Babu model governed by an gauge symmetry wherein three right handed neutrinos with identical gauge charge…
Bounds on Exotic Couplings from a New -Background
Indra Kumar Banerjee, Ujjal Kumar Dey, Anna John
We propose a hitherto unexplored neutrino background emerging from the mechanism of quenched superradiance of rotating primordial black holes. The quenching of the phenomenon happe…
Gravitational Wave Probe of Singlet-Doublet Dark Matter Induced Radiative Neutrino Mass
Ujjal Kumar Dey, Santu Kumar Manna, Partha Kumar Paul +2
We investigate an one loop radiative neutrino mass model, where the loop particles, notably a singlet fermion (), a doublet fermion () and three generations of singlet scalar…
Asymmetric Cannibal Dark Matter: Constraints from Neutron Star
Ujjal Kumar Dey, Sourav Gope
Asymmetric dark matter can be efficiently captured by neutron stars via elastic scattering with nucleons and dark matter self scattering. The accumulated dark matter thermalizes an…
Primordial Black Holes and Gravitational Waves in Extensions of the Standard Model
Indra Kumar Banerjee, Ujjal Kumar Dey, Shaaban Khalil
We investigate the phenomenology of a Standard Model extension incorporating an inert scalar doublet and a gauged symmetry. Our analysis reveals regions of the paramet…
Neutrino Decoherence via Modified Dispersion
Bikash Kumar Acharya, Indra Kumar Banerjee, Ujjal Kumar Dey
We study in detail the effect of quantum decoherence in neutrino oscillations. We adopt a phenomenological approach that allows us to parametrize the energy dependence of the decoh…
Majorana CP Violation Insights from Decaying Neutrinos
Sabila Parveen, Soumya Bonthu, Newton Nath +2
It is well-known that within the standard three flavor neutrino oscillation formalism, the Majorana phases appearing in the neutrino mixing matrix cannot have any effect on neutrin…
Multi-messenger Astronomy with Quenched Superradiance
Indra Kumar Banerjee, Soumya Bonthu, Ujjal Kumar Dey
We propose a novel method to study the ultra-light bosons, where compact rotating objects undergo the phenomenon of quenched superradiance to create gravitational waves and neutrin…
Primordial Black Holes and Gravitational Waves in the Extended Inert Doublet Model: A First-Order Phase Transition Perspective
Indra Kumar Banerjee, Ujjal Kumar Dey, Shaaban Khalil
We conduct an analysis of a extended inert doublet model and obtained the parameter space allowing strong first order phase transitions. We show that a large part of t…
PTOLEMY's test of generalized neutrino interactions: unveiling challenges and constraints
Indra Kumar Banerjee, Ujjal Kumar Dey, Newton Nath +1
Unanswered questions surrounding neutrinos have motivated investigations into physics beyond the standard model (SM) of particle physics. In particular, generalized neutrino intera…
A hidden gauged addressing radiative neutrino mass, dark matter, , and tension
Ujjal Kumar Dey, Hiroshi Okada
We propose a radiative seesaw model with a hidden gauge symmetry. In order to have anomaly cancellations, we need to introduce several new fermions that contribute to muon a…
Neutrino Decoherence from Generalised Uncertainty
Indra Kumar Banerjee, Ujjal Kumar Dey
Quantum gravity models predict a minimal measurable length which gives rise to a modification in the uncertainty principle. One of the simplest manifestations of these generalised…
Neutrino Condensate Dark Energy from TeV Scale Extra Dimensions
Ujjal Kumar Dey, Utpal Sarkar
We propose a new scenario of incorporating neutrino masses in models of TeV scale gravity and large extra dimensions, which can explain the dark energy problem through formation of…
Leptogenesis in an extended seesaw model with symmetry
Ujjal Kumar Dey, Tapoja Jha, Ananya Mukherjee +1
We have explored an extended seesaw model accommodating a keV sterile neutrino adopting symmetry. This model provides a natural platform for achieving resonant leptoge…
Charged Higgs effects in IceCube: PeV events and NSIs
Ujjal Kumar Dey, Newton Nath, Soumya Sadhukhan
Extensions of the Standard Model with charged Higgs, having a non-negligible coupling with neutrinos, can have interesting implications vis-à-vis neutrino experiments. Such models…
Prospects of Migdal Effect in the Explanation of XENON1T Electron Recoil Excess
Ujjal Kumar Dey, Tarak Nath Maity, Tirtha Sankar Ray
The XENON1T experiment has recently announced the observation of an excess in electron recoil events at energy range of keV with a signal significance over the Standa…
Connecting ANITA Anomalous Events to a Non-thermal Dark Matter Scenario
Debasish Borah, Arnab Dasgupta, Ujjal Kumar Dey +1
The ANtarctic Impulsive Transient Antenna (ANITA) collaboration has observed two EeV-energy, upward going events originating from below the horizon. As no standard model (SM) parti…
An inverse seesaw model with global symmetry
Ujjal Kumar Dey, Takaaki Nomura, Hiroshi Okada
We propose an inverse seesaw model based on hidden global symmetry in which we realize tiny neutrino masses with rather natural manner taking into account relevant experim…
Boosting Assisted Annihilation for a Cosmologically Safe MeV Scale Dark Matter
Ujjal Kumar Dey, Tarak Nath Maity, Tirtha Sankar Ray
Assisted annihilation generates thermal sub-GeV dark matter through a novel annihilation between a pair of dark matter and standard-model-like states, called the "assister". We sho…