16 citations · 49 across the 17 of their papers we have counts for
18 papers · 1 filter
Exothermic dark-photon dark matter and the LZ high-recoil event: finite-reheating constraints
Kuldeep Deka
An excited dark-matter state can produce a high-energy nuclear recoil by releasing its mass splitting in a collision. Motivated by the ~keV LUX--ZEPLIN candidate, we study fre…
Reheating the FCC: Probing Early Matter Domination with Long-Lived Particles
Nicolás Bernal, Giovanna Cottin, Kuldeep Deka +1
We study a GeV-scale Higgs-portal scalar that can dominate the early Universe and later decay into Standard Model states, ending an early matter-dominated era. Ordinary cosmic…
Freeze-in and ultra-relativistic freeze-out during general reheating scenarios
Kuldeep Deka
The dark-matter relic abundance can depend sensitively on the thermal history before radiation domination. We derive a general analytic framework for dark-matter production from th…
Sterile neutrino Dark Matter in the minimal Dirac Seesaw
J. Adhikary, A. Batra, K. Deka +1
We study sterile neutrino dark matter in a minimal Type-I Dirac seesaw framework where the states responsible for generating Dirac neutrino masses at tree level can be viable dark…
Chasing the muon EDM to constrain the SMEFT and UV models
Kuldeep Deka, Marta Losada, Yosef Nir
Following a proposal for an experiment with sensitivity to an electric dipole moment (EDM) of the muon of order cm, three to four orders of magnitude bel…
Freezing-in Cannibals with Low-reheating Temperature
Nicolás Bernal, Esau Cervantes, Kuldeep Deka +1
The freeze-in mechanism provides a compelling framework for dark matter (DM) production, particularly suited to scenarios involving feeble interactions with the Standard Model (SM)…
Dark Matter Ultraviolet Freeze-in in General Reheating Scenarios
Nicolás Bernal, Kuldeep Deka, Marta Losada
The dynamics of cosmic reheating, that is, on how the energy stored in the inflaton is transferred to the standard model (SM) thermal bath, is largely unknown. In this work, we sho…
Heavy Neutral Leptons without Prejudice
Nicolás Bernal, Kuldeep Deka, Marta Losada
Heavy Neutral Leptons (HNLs) provide a compelling extension to the Standard Model, addressing the neutrino masses, baryogenesis, and dark matter problems. We perform a model-indepe…
Thermal Dark Matter with Low-Temperature Reheating
Nicolás Bernal, Kuldeep Deka, Marta Losada
We explore the production of thermal dark matter (DM) candidates (WIMPs, SIMPs, ELDERs and Cannibals) during cosmic reheating. Assuming a general parametrization for the scaling of…
Boosted four-top production at the LHC : a window to Randall-Sundrum or extended color symmetry
Debajyoti Choudhury, Kuldeep Deka, Lalit Kumar Saini
Scenarios seeking to address the issue of electroweak symmetry breaking often have heavy colored gauge bosons coupling preferentially to the top quark. Considering the bulk Randall…
Discovering Heavy Neutral Leptons with the Higgs Boson
Nicolás Bernal, Kuldeep Deka, Marta Losada
We study the dominant signatures that arise in Higgs physics at colliders when extending the Standard Model (SM) with a Yukawa interaction to heavy neutral leptons (HNL), while sup…
Right-handed neutrino pair production via second-generation leptoquarks
Arvind Bhaskar, Yash Chaurasia, Kuldeep Deka +3
No direct experimental constraints exist on Leptoquark (LQ) couplings with quarks and right-handed neutrinos (RHNs). If a LQ dominantly couples to RHNs, it can leave unique signatu…
Constraining SMEFT BSM scenarios with EWPO and
Mathew Thomas Arun, Kuldeep Deka, Tripurari Srivastava
Precision observables are well known for constraining most of the Beyond Standard Model (BSM) scenarios tightly. We present here a simple and comprehensive fitting framework for va…
Light Dark Matter Detection and Neutrino Floor: Role of Anomalous
Kuldeep Deka, Soumya Sadhukhan, Manvinder Pal Singh
In this work, we explore the impact of dark matter (DM) relic density and direct detection constraints on a GeV scale DM in the context of recent anomalous muon magnetic moment $(g…
Anomalous gauge couplings vis--vis and flavor observables
Debajyoti Choudhury, Kuldeep Deka, Suvam Maharana +1
We reassess non-standard triple gauge couplings in the light of the recent measurement at FNAL, the new lattice theory result of and the updated measurements of…
Leptogenesis in an anomaly-free extension with higher-dimensional operators
Kuldeep Deka, Tanumoy Mandal, Ananya Mukherjee +1
We explore an anomaly-free gauge extended beyond the Standard model (BSM) framework, to account for the baryon asymmetry of the Universe, along with arranging for…
Looking for a vectorlike B quark at LHC using jet substructure
Debajyoti Choudhury, Kuldeep Deka, Nilanjana Kumar
Vectorlike quarks have been shown to resolve certain long-standing discrepancies pertaining to the bottom sector. We investigate, here, the prospects of identifying the existence o…
Neutrino and phenomenology in an anomaly-free extension: role of higher-dimensional operators
Debajyoti Choudhury, Kuldeep Deka, Tanumoy Mandal +1
We consider an anomaly-free extension of the Standard Model with three right-handed neutrinos (RHNs) and two complex scalars, wherein the charge assignments preclud…