What ho!


I'm a particle theorist and an Assistant Professor at the Indian Institute of Science, Bengaluru, at the Centre for High Energy Physics. I write at The Hindu.

I have another website that is strictly academic.

What I do

[Details with pictures.]

Much of my time is spent trying to fathom the nature of dark matter, the ubiquitous, invisible, mysterious stuff that lurks in 85% of the mass of the universe, and is responsible for giving the cosmos its current look on large scales. I have proposed new experiments to unveil dark matter in the sky and in laboratory detectors; I have taken part in a search at an underground experiment, DEAP-3600 at SNOLAB. I also study detection of neutrinos from supernovae; I am part of the SuperNova Early Warning System (SNEWS) collaboration.

Additionally, I research scenarios that address long-standing puzzles regarding the Fermi scale (10-16 cm) in the setting of particle colliders.

Selected publications

[Full list in Google Scholar, InspireHEP, arXiv.]

*featured as Editors' Suggestion.

Subhalos in neutron stars, cosmic rays and old rocks,
J. Bramante, B. Kavanagh, N. Raj,
Phys. Rev. Lett. 128 (2022) 23, 231801

Neutron star internal heating constraints on mirror matter,
D. McKeen, M. Pospelov, N. Raj,
Phys. Rev. Lett. 127 (2021), 061805

Breaking up the proton: an affair with dark forces,
G. Kribs, D. McKeen, N. Raj,
Phys. Rev. Lett. 126 (2021), 011801

Hydrogen portal to exotic radioactivity,
D. McKeen, M. Pospelov, N. Raj,
Phys. Rev. Lett. 125 (2020) 23, 231803*

Neutrinos from Type Ia and failed core-collapse supernovae at dark matter detectors,
N. Raj,
Phys. Rev. Lett. 124 (2020) 14, 141802

An infrared window on dark kinetic heating of neutron stars,
M. Baryakhtar, J. Bramante, S. Li, T. Linden, N. Raj,
Phys. Rev. Lett. 119 (2017) 13, 131801

Non-resonant exotica in LHC dilepton angular spectra,
N. Raj,
Phys. Rev. D 95 (2017) 1, 015011

First laboratory constraints on Planck-scale mass dark matter,
DEAP-3600 collaboration & N. Raj,
Phys. Rev. Lett. 128 (2022), 011801

My collaborators' home countries:

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