Utpal Chattopadhyay

collaborators

3 papers

hep-ph2026

Diffuse Supernova Neutrinos with Secret Neutrino Interactions

Praveen Bharadwaj, Utpal Chattopadhyay, Dilip Kumar Ghosh +1

The Diffuse Supernova Neutrino Background (DSNB), an isotropic flux arising from the cumulative neutrino emission of all stellar core-collapse events throughout cosmic history, is…

hep-ph2026

Constraints on lepton flavor universal and non-universal New Physics in $b \to s ℓ^{+} ℓ^{-}$ decays: a global SMEFT survey

Md Isha Ali, Utpal Chattopadhyay, Dilip Kumar Ghosh +1

The flavor-changing neutral current semileptonic decays of $B$ mesons provide an excellent platform for indirectly probing New Physics (NP) beyond the Standard Model (SM). Recent m…

hep-ph2025

Constraining lepton flavor violating SMEFT $2 q 2 ℓ$ operators from low-energy cLFV processes

Utpal Chattopadhyay, Debottam Das, Rahul Puri +1

Charged lepton flavour-violating (cLFV) processes, which are definite proof of new physics beyond the Standard Model, have remained elusive experimentally till now. Effective Field…

Diffuse Supernova Neutrinos with Secret Neutrino Interactions

Constraints on lepton flavor universal and non-universal New Physics in b→sℓ+ℓ− decays: a global SMEFT survey

Constraining lepton flavor violating SMEFT 2q2ℓ operators from low-energy cLFV processes

Constraints on lepton flavor universal and non-universal New Physics in $b \to s ℓ^{+} ℓ^{-}$ decays: a global SMEFT survey

Constraining lepton flavor violating SMEFT $2 q 2 ℓ$ operators from low-energy cLFV processes