6 papers
Emergent Large Lepton Mixing from Neutrino Refraction in Dark Matter
Susobhan Chattopadhyay, Yuber F. Perez-Gonzalez, Manibrata Sen
We propose a novel origin for the disparity between quark and lepton flavor mixing based on the refractive nature of neutrino masses. We postulate that the fundamental mixing in bo…
Differential observables for the Higgs-strahlung process to all orders in EFT
Sourav Bera, Debsubhra Chakraborty, Susobhan Chattopadhyay +1
We develop methods to obtain the fully differential cross-section for the process to any desired order in effective field theory (EFT). To achieve th…
The Potential of HEFT and the scale of New Physics
Rodrigo Alonso, Susobhan Chattopadhyay, James Ingoldby
We employ a geometric framework to compute the leading high-energy behaviour of tree-level scattering amplitudes in theories containing Nambu-Goldstone bosons and a single Higg…
Refractive neutrino masses in the solar DM halo: Can the dark-LMA solution be revived?
Susobhan Chattopadhyay, Amol Dighe
Neutrinos can acquire "refractive masses" as a consequence of their interactions with ultralight dark matter (DM). We explore a model with two additional sterile neutrinos and an u…
Towards the HEFT-hedron: the complete set of positivity constraints at NLO
Debsubhra Chakraborty, Susobhan Chattopadhyay, Rick S. Gupta
We present the complete set of positivity bounds on the Higgs Effective Field Theory (HEFT) at next-to-leading order (NLO). We identify the 15 operators that can be constrained by…
Cosmological selection of a small weak scale from large vacuum energy: a minimal approach
Susobhan Chattopadhyay, Dibya S. Chattopadhyay, Rick S. Gupta
We present a minimal cosmological solution to the hierarchy problem. Our model consists of a light pseudoscalar and an extra Higgs doublet in addition to the field content of the S…