5 papers
A Non-Holomorphic Modular Framework for Resonant Leptogenesis with Gravitational Wave Signatures
Mitesh Kumar Behera, Jaydeb Das, Niloy Mondal
We study a type-I seesaw framework based on non-holomorphic modular symmetry, where polyharmonic Maaà forms construct the Yukawa couplings and right-handed neutrino (RHN) Ma…
Revisiting Singlet Fermion Dark Matter with a Scalar Portal: Connecting Higgs Phenomenology and Strong Electroweak Phase Transition
Jaydeb Das, Saurabh Niyogi, Tripurari Srivastava
We investigate a minimal extension of the Standard Model with a real singlet scalar and a singlet Dirac fermion acting as dark matter. Unlike a conventional singlet scalar setup, w…
Solving Cosmological Puzzles using Finite Temperature SMEFT
Debajyoti Choudhury, Jaydeb Das, Tripurari Srivastava
We study a minimal framework that naturally yields viable Dark Matter, a strong first-order electroweak phase transition and low-scale resonant leptogenesis. Augmenting the Standar…
Two-loop dimension Six Effective Action: Integrating Out Heavy Scalar
Nilabhra Adhikary, Jaydeb Das, Debmalya Dey
For the first time, we present the model-independent two-loop effective action up to dimension six after integrating out heavy scalar(s) employing the Heat-Kernel method. We comput…
Electroweak Phase Transition, Gravitational Waves and Collider Probes in Multi-Scalar Dark Matter Scenarios
Tripurari Srivastava, Jaydeb Das, Anupam Ghosh +1
We study scalar singlet extensions of the Standard Model (SM), focusing on scenarios where dark matter (DM) is stabilized by a \(\mathbb{Z}_2\) symmetry. In the minimal single-scal…