12 papers
ALP and boson at the Electron-Ion collider
Amit Adhikary, Dilip Kumar Ghosh, Sk Jeesun +1
We study the sensitivity of the upcoming electron-ion (EIC) collider to purely electrophilic new physics in the GeV mass range. Within an effective field theory framework, we consi…
Freeze-in vector dark matter at low reheating temperature
Dilip Kumar Ghosh, Sourav Gope, Xiao-Gang He +2
The freeze-in mechanism for dark matter (DM) requires extremely feeble interactions with the Standard Model (SM), preventing thermal equilibrium in the early Universe and typically…
Chasing Long-Lived Doubly Charged Scalars at Future Lepton Colliders
Nandini Das, Dilip Kumar Ghosh, Nivedita Ghosh +1
We come up with a novel search strategy for long-lived doubly charged scalars at future proposed lepton colliders. The doubly charged scalar studied in this work belongs to an $SU(…
Vector Dark Matter in a extended 2HDM
Nandini Das, Juhi Dutta, Dilip Kumar Ghosh +1
We investigate the possibility of having a vector boson dark matter in a extended two-Higgs-doublet model (2HDM) setup. The gauge boson gains mass when a SM singlet comple…
Impact of Non-Thermal Leptogenesis with Early Matter Domination on Gravitational Waves from First-order Phase Transition
Dilip Kumar Ghosh, Anish Ghoshal, Koustav Mukherjee +2
We study the impact of non-thermal leptogenesis on the spectrum of gravitational waves (GWs) produced by a strong first-order phase transition in the early Universe. We consider a…
Complex Scalar Singlet Model: Electroweak Phase Transition and Gravitational Waves
Dilip Kumar Ghosh, Debadrita Mukherjee, Koustav Mukherjee +1
The Standard Model (SM) cannot explain the observed baryon asymmetry of the Universe (BAU), thus driving the need for physics beyond the SM, which can generate electroweak baryogen…