Author

Sanjoy Mandal

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Preprint Jul 2026

Heavy neutral leptons from light scalar in fixed target and forward search experiments

The observation of neutrino masses strongly motivates $U(1)_{B-L}$ extensions of the Standard Model, in which heavy neutral leptons acquire Majorana masses through spontaneous $U(1)_{B-L}$ symmetry breaking and generate light neutrino masses via the seesaw mechanism. In this framework, the singlet scalar responsible fo...

ShivaSankar K.A., Souvik Das, Arindam Das et al. · 0 citations

Preprint Jul 2026

Quantum spin correlations in $Z^\prime$-mediated $t\bar{t}$ production at future lepton colliders

We study quantum spin correlations in top-quark pair production at future lepton colliders in the presence of a neutral gauge boson from anomaly-free general $U(1)$ extensions of the Standard Model. The process $\ell^+\ell^-\to t\bar t$, with $\ell=e,\mu$, is analyzed through the spin-density matrix including $\gamma$,...

ShivaSankar K. A., Arindam Das, Sanjoy Mandal · 0 citations