190 citations · 1.5k across the 35 of their papers we have counts for
36 papers
Baryogenesis from a Majorana Fermion Coupled to Quarks
Shrihari Gopalakrishna, Rakesh Tibrewala
In the theory with a Majorana fermion () coupled to quark-like fermions () via a dimension-six four-fermion vector-vector interaction, we have computed in an earlier work the…
Baryon Asymmetry from the Decay and Scattering of a Majorana Fermion Pair Coupled to Quarks
Shrihari Gopalakrishna, Rakesh Tibrewala
We compute the baryon asymmetry in decay and scattering processes involving the electromagnetically charge-neutral fermion that carries nonzero baryon number and interacts with…
Effective Theory for Baryogenesis with a Majorana Fermion Pair Coupled to Quarks
Shrihari Gopalakrishna, Rakesh Tibrewala
With a goal toward explaining the observed baryon asymmetry of the Universe, we extend the standard model (SM) by adding a vector-vector dimension-six effective operator coupling a…
Higgs Vacuum Stability with Vector-like Fermions
Shrihari Gopalakrishna, Arunprasath Velusamy
We present the effects of vector-like fermions (VLF) on the stability of the Higgs electroweak vacuum, using the renormalization group improved Higgs effective potential. We review…
Gauge Singlet Vector-like Fermion Dark Matter, LHC Diphoton Rate and Direct Detection
Shrihari Gopalakrishna, Tuhin Subhra Mukherjee
We study a gauge-singlet vector-like fermion hidden-sector dark matter model, in which the communication between the dark matter and the visible standard model sector is via the Hi…
The 750 GeV diphoton excess in a two Higgs doublet model and a singlet scalar model, with vector-like fermions, unitarity constraints, and dark matter implications
Shrihari Gopalakrishna, Tuhin Subhra Mukherjee
We explore the possibility of a beyond the standard model scalar () as a possible explanation of the diphoton resonance at 750~GeV invariant mass reported by the ATLAS and CMS c…