Zobrazeno 1 - 10
of 136
pro vyhledávání: '"Dey, Ujjal Kumar"'
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 neutrino oscillation probabilities thereby evading testability at neutrino os
Externí odkaz:
http://arxiv.org/abs/2410.21428
We propose a novel method to study the ultra-light scalars, where compact rotating objects undergo the phenomenon of superradiance to create gravitational waves and neutrino flux signals. The neutrino flux results from the 'right' coupling between th
Externí odkaz:
http://arxiv.org/abs/2406.13756
We conduct an analysis of a $U(1)_{B-L}$ extended inert doublet model and obtained the parameter space allowing strong first order phase transitions. We show that a large part of the parameter space can cause double first-order phase transitions. Whe
Externí odkaz:
http://arxiv.org/abs/2406.12518
Publikováno v:
JCAP 04 (2024) 049
In this article we have used stochastic gravitational wave background as a unique probe to gain insight regarding the creation mechanism of primordial black holes. We have considered the cumulative gravitational wave background which consists of the
Externí odkaz:
http://arxiv.org/abs/2311.02876
Publikováno v:
JHEP 07 (2024) 006
We conduct a novel study to obtain the initial spin of the primordial black holes created during a first-order phase transition due to delayed false vacuum decay. Remaining within the parameter space consistent with observational bounds, we express t
Externí odkaz:
http://arxiv.org/abs/2311.03406
Publikováno v:
JCAP 07 (2023) 024
In this article we investigate the cumulative stochastic gravitational wave spectra as a tool to gain insight on the creation mechanism of primordial black holes. We consider gravitational waves from the production mechanism of primordial black holes
Externí odkaz:
http://arxiv.org/abs/2305.07569
Publikováno v:
JCAP 04 (2024) 002
Unanswered questions surrounding neutrinos have motivated investigations into physics beyond the standard model (SM) of particle physics. In particular, generalized neutrino interactions (GNI) provide a broader framework for studying these effects co
Externí odkaz:
http://arxiv.org/abs/2304.02505
Autor:
Dey, Ujjal Kumar, Okada, Hiroshi
We propose a radiative seesaw model with a hidden $U(1)$ gauge symmetry. In order to have anomaly cancellations, we need to introduce several new fermions that contribute to muon anomalous magnetic dipole moment $(g-2)_\mu$ as well as explain the neu
Externí odkaz:
http://arxiv.org/abs/2302.07008
Publikováno v:
Eur. Phys. J. C (2023) 83, 428
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 uncertainty principles is the linear quadratic generalised uncertainty
Externí odkaz:
http://arxiv.org/abs/2208.12062
Autor:
Dey, Ujjal Kumar, Sarkar, Utpal
Publikováno v:
Nucl. Phys. B 979 (2022) 115768
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 neutrino condensates. The smallness of the neutrino masses and the sc
Externí odkaz:
http://arxiv.org/abs/2204.01141