6 papers
Probing Invisible Fermions in via Angular Observables
Lipika Kolay, Soumitra Nandi, Shantanu Sahoo
Semileptonic decays provide a sensitive probe of light invisible particles, such as sterile neutrinos or dark-sector fermions. Within a general we…
Probing Light Dark Fermions in via Rate Distributions
Lipika Kolay, Soumitra Nandi, Shantanu Sahoo +1
Experimental analyses of the semileptonic decays typically rely on the assumption that the missing energy originates from a massless neutrino, as predi…
Flavour and Electroweak Precision Constraints on a Simplified Dark Matter Model with a Light Spin-0 Mediator
Lipika Kolay, Soumitra Nandi
This work investigates the allowed parameter spaces of a simplified dark matter (DM) model characterized by a spin-0 mediator with masses in the low to intermediate range ( 10…
A Comprehensive Study on Top Quark FCNC Interactions in SMEFT Framework
Subhajit Kala, Soumitra Nandi
We present a comprehensive, model-independent analysis of rare flavour-changing neutral current (FCNC) interactions of the top quark within an effective field theory framework. Beg…
Constraining anomalous and related SMEFT couplings using low-energy and electroweak precision observables
Subhajit Kala, Lipika Kolay, Lopamudra Mukherjee +1
We investigate constraints on couplings of Standard Model effective field theory (SMEFT) operators contributing to effective vertex at tree level. We study the one-loop level…
Exploring Constraints on Simplified Dark Matter Model Through Flavour and Electroweak Observables
Lipika Kolay, Soumitra Nandi
This study focuses on a combined analysis of various available inputs to constrain the parameter spaces of a simplified dark matter (SDM) model featuring a spin-0 mediator and ferm…