17 citations · 109 across the 12 of their papers we have counts for
12 papers · 1 filter
Thermal Leptogenesis in the Babu-Nandi-Tavartkiladze Model of Neutrino Mass
P. S. Bhupal Dev, Srubabati Goswami, Debashis Pachhar +1
We investigate neutrino mass and thermal leptogenesis in the Babu-Nandi-Tavartkiladze (BNT) model featuring a scalar quadruplet () and a pair of vector-like fermion triplets ($Σ…
Universal Seesaw Leptogenesis
K. S. Babu, Maximilian Berbig, Srubabati Goswami +1
We study the implications for leptogenesis in a class of left-right symmetric model, where all fermion masses are induced through the Universal Seesaw mechanism. Unlike conventiona…
From Capture to Collapse: Revisiting Black Hole formation by Fermionic Asymmetric Dark Matter in Neutron Stars
Sandra Robles, Drona Vatsyayan, Giorgio Busoni
Fermionic asymmetric dark matter (ADM) can be captured in neutron stars (NSs) via scatterings with the star constituents. The absence of dark matter annihilation due to its asymmet…
Large neutrino mass in cosmology and keV sterile neutrino dark matter from a dark sector
Cristina Benso, Thomas Schwetz, Drona Vatsyayan
We consider an extended seesaw model which generates active neutrino masses via the usual type-I seesaw and leads to a large number of massless fermions as well as a sterile neutri…
Leptogenesis, Dark Matter and Gravitational Waves from Discrete Symmetry Breaking
Subhaditya Bhattacharya, Niloy Mondal, Rishav Roshan +1
We analyse a model that connects the neutrino sector and the dark sector of the universe via a mediator , stabilised by a discrete symmetry that breaks to a remnant …
Neutrino masses from new seesaw models: Low-scale variants and phenomenological implications
Alessio Giarnetti, Juan Herrero-Garcia, Simone Marciano +2
With just the Standard Model Higgs doublet, there are only three types of seesaw models that generate light Majorana neutrino masses at tree level after electroweak spontaneous sym…
Neutrino masses from new Weinberg-like operators: Phenomenology of TeV scalar multiplets
Alessio Giarnetti, Juan Herrero-Garcia, Simone Marciano +2
The unique dimension- effective operator, , known as the Weinberg operator, generates tiny Majorana masses for neutrinos after electroweak spontaneous symmetry breaking. I…
Asymmetries in Extended Dark Sectors: A Cogenesis Scenario
Juan Herrero-Garcia, Giacomo Landini, Drona Vatsyayan
The observed dark matter relic abundance may be explained by different mechanisms, such as thermal freeze-out/freeze-in, with one or more symmetric/asymmetric components. In this w…
Lowering the scale of fermion triplet leptogenesis with two Higgs doublets
Drona Vatsyayan, Srubabati Goswami
In this paper, we consider the possibility of generating the observed baryon asymmetry of the Universe via leptogenesis in the context of triplet fermion mediated type-III seesaw m…
Multi-component Dark Sectors: Symmetries, Asymmetries and Conversions
Arnau Bas i Beneito, Juan Herrero-García, Drona Vatsyayan
We study the relic abundance of several stable particles from a generic dark sector, including the possible presence of dark asymmetries. After discussing the different possibiliti…
Symmetry origin of Baryon Asymmetry, Dark Matter and Neutrino Mass
Subhaditya Bhattacharya, Rishav Roshan, Arunansu Sil +1
We propose a minimal model based on lepton number symmetry (and violation), to address a common origin of baryon asymmetry, dark matter and neutrino mass generation. The model cons…
Constraints on the quark mixing matrix with vector-like quarks
Drona Vatsyayan, Anirban Kundu
While a chiral fourth generation of quarks is almost ruled out from the data on Higgs boson production and decay at the Large Hadron Collider, vector-like quarks are still a feasib…