21 citations · 56 across the 12 of their papers we have counts for
13 papers
Quantum Seesaw Cosmology: A Heating Phase from Pauli Blocking
Nicolás Bernal, Chee Sheng Fong
In Seesaw Cosmology, a scalar field reheats the Standard Model (SM) through right-handed neutrinos (RHNs), which generate tiny neutrino masses through the seesaw mechanism. When RH…
Cosmic Evolution of the Standard Model Flavor Charges
Chee Sheng Fong, Sergio Manuel Cubides Pérez
Since all the Standard Model (SM) parameters have been measured to precision at the percent level or smaller, one would aim to have a framework which describes baryogenesis as prec…
Seesaw Cosmology
Nicolás Bernal, Chee Sheng Fong, Óscar Zapata
We study perturbative reheating in which the inflaton transfers its energy to the Standard Model through right-handed neutrinos (RHNs) responsible for light-neutrino masses via the…
Towards Precision Neutrino Fits in GUTs: Relevance of One-Loop Finite Corrections
Chee Sheng Fong, Shaikh Saad
In this work, we perform a dedicated analysis of fermion mass fits in the minimal grand unified theory (GUT), going beyond the tree-level approximation by incorporating on…
Electroweak Triplet Scalar Contribution to Leptogenesis
Chee Sheng Fong, Ketan M. Patel
We show that electroweak triplet scalar can significantly impact baryogenesis via leptogenesis in concrete and predictive GUTs, even when light neutrino masses arise predo…
Probing low-reheating scenarios with minimal freeze-in dark matter
Nicolás Bernal, Chee Sheng Fong, Óscar Zapata
The parameter space of freeze-in dark matter (DM) with mass through light dark photon (``minimal freeze-in DM'') is currently being probed by direct detection experiments thr…
Sphaleron portal baryogenesis
Chee Sheng Fong
Nontrivial topological vacua of non-Abelian gauge symmetry of the Standard Model play an important role in baryogenesis. In particular, the baryon (and lept…
Primordial non-Gaussianity as a probe of seesaw and leptogenesis
Chee Sheng Fong, Anish Ghoshal, Abhishek Naskar +2
We present the possibility that the seesaw mechanism and nonthermal leptogenesis can be {investigated} via primordial non-Gaussianities in the context of a majoron curvaton model.…
BBN Photodisintegration Constraints on Gravitationally Produced Vector Bosons
Chee Sheng Fong, Moinul Hossain Rahat, Shaikh Saad
Gravitational production of massive particles due to cosmic expansion can be significant during the inflationary and reheating period of the Universe. If the particle also has non-…
Cosmic Evolution of Lepton Flavor Charges
Chee Sheng Fong
In the early Universe above the weak scale, both baryon and lepton numbers are violated by nonperturabive effects in the Standard Model while remains conserved. Intro…
Low-scale Resonant Leptogenesis in GUT with Family Symmetry
Chee Sheng Fong, Moinul Hossain Rahat, Shaikh Saad
We investigate low-scale resonant leptogenesis in an model where a single high energy phase in the complex Tribimaximal seesaw mixing produces the y…
Hot Leptogenesis from Thermal Dark Matter
Nicolás Bernal, Chee Sheng Fong
In this work, we investigate a scenario in which heavy Majorana Right-Handed Neutrinos (RHNs) are in thermal equilibrium with a dark sector with temperature higher than the Standar…
Nonthermal violation in soft leptogenesis
Rathin Adhikari, Arnab Dasgupta, Chee Sheng Fong +1
Soft leptogenesis is a mechanism which generates the matter-antimatter asymmetry of the Universe via the out-of-equilibrium decays of heavy sneutrinos in which soft supersymmetry b…