Soumitra Nandi

collaborators

3 papers

hep-ph2026

Probing Invisible Fermions in $B \to D^{*} ℓ X_{inv}$ via Angular Observables

Lipika Kolay, Soumitra Nandi, Shantanu Sahoo

Semileptonic decays $B \to D^{*} ℓ X_{inv}$ provide a sensitive probe of light invisible particles, such as sterile neutrinos or dark-sector fermions. Within a general we…

hep-ph2026

Probing Light Dark Fermions in $B \to D^{(*)} ℓ X_{inv}$ via Rate Distributions

Lipika Kolay, Soumitra Nandi, Shantanu Sahoo +1

Experimental analyses of the semileptonic decays $B \to D^{(*)} ℓ ν ˉ$ typically rely on the assumption that the missing energy originates from a massless neutrino, as predic…

hep-ph2025

Constraining anomalous $W t b$ 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 $W t b$ effective vertex at tree level. We study the one-loop level…

Probing Invisible Fermions in B→D∗ℓXinv​ via Angular Observables

Probing Light Dark Fermions in B→D(∗)ℓXinv​ via Rate Distributions

Constraining anomalous Wtb and related SMEFT couplings using low-energy and electroweak precision observables

Probing Invisible Fermions in $B \to D^{*} ℓ X_{inv}$ via Angular Observables

Probing Light Dark Fermions in $B \to D^{(*)} ℓ X_{inv}$ via Rate Distributions

Constraining anomalous $W t b$ and related SMEFT couplings using low-energy and electroweak precision observables