11 papers
Deep Earth imaging through neutrino and seismic tomography
Sanjib Kumar Agarwalla, Arjun Datta, Amol Dighe +2
This article is a report on the Deep Earth Neutrino + Seismic Imaging and TomographY (DENSITY 2026) mini-workshop, held on 23--24 February 2026 in the Department of Earth and Clima…
Probing long-range forces with supernova neutronization burst neutrinos
Amol Dighe, Sadashiv Sahoo, Manibrata Sen
Ultralight gauge bosons associated with flavour-dependent leptonic symmetries generate long-range potentials that can modify neutrino flavour evolution over astrophysical distances…
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…
A White Paper on The Multi-Messenger Science Landscape in India
Samsuzzaman Afroz, Sanjib Kumar Agarwalla, Dipankar Bhattacharya +35
The multi-messenger science using different observational windows to the Universe such as Gravitational Waves (GWs), Electromagnetic Waves (EMs), Cosmic Rays (CRs), and Neutrinos o…
Exploring constraints on the core radius and density jumps inside Earth using atmospheric neutrino oscillations
Anuj Kumar Upadhyay, Anil Kumar, Sanjib Kumar Agarwalla +1
Atmospheric neutrinos, through their weak interactions, can serve as an independent tool for exploring the internal structure of Earth. The information obtained would be complement…
Constraining electromagnetic couplings of ultralight scalars from compact stars
Tanmay Kumar Poddar, Amol Dighe
If an ultralight scalar interacts with the electromagnetic fields of a compact rotating star, then a long-range scalar field is developed outside the star. The Coulomb-like profile…
Exploring observable effects of scalar operators beyond SMEFT in the angular distribution of
Siddhartha Karmakar, Amol Dighe
The invariance of the Standard Model Effective Field Theory (SMEFT) imposes relations among different low-energy effective field theory Wilson coefficients (…
Constraining the core radius and density jumps inside Earth using atmospheric neutrino oscillations
Anuj Kumar Upadhyay, Anil Kumar, Sanjib Kumar Agarwalla +1
Atmospheric neutrinos probe the interior of Earth using weak interactions, and provide information complementary to that of gravitational and seismic measurements. While passing th…
SMEFT predictions for semileptonic processes
Siddhartha Karmakar, Amol Dighe, Rick S. Gupta
The invariance of the Standard Model Effective Field Theory (SMEFT) predicts multiple restrictions in the space of Wilson coefficients of invaria…
Probing the interior of Earth using oscillating neutrinos at INO-ICAL
Anil Kumar, Anuj Kumar Upadhyay, Sanjib Kumar Agarwalla +1
Atmospheric neutrinos offer the possibility of exploring the internal structure of Earth. This information is complementary to the traditional probes of seismic and gravitational s…
Light Shining Through Wall Bounds on Axions From Obscured Magnetars
Dibya S. Chattopadhyay, Basudeb Dasgupta, Amol Dighe +1
Coupling of axions or axion-like particles (ALPs) with photons may lead to photons escaping optically opaque regions by oscillating into ALPs. This phenomenon may be viewed as the…