7 papers
Signatures of gravity-mediated dark matter interaction in theories with large extra dimensions
A. Clarke, V. V. Flambaum, M. Pospelov +1
Dark matter particles that couple to the Standard Model only through gravity are usually regarded as inaccessible to laboratory detection. This expectation can change in theories w…
Constraints on millicharged particles from nuclear gamma-decays
Ting Gao, Maxim Pospelov
We consider nuclear gamma decays and -emitting reactions that can be an efficient source of hypothetical millicharged particles (). In particular, we revisit the production…
Novel Constraints on Spin-Dependent Light Dark Matter Scattering
Alexander Clarke, Maxim Pospelov
We explore the sensitivity of the SNO experiment to light dark matter particles with spin-dependent interactions with nucleons. We show that the pair-production of MeV scale d…
New physics in multi-lepton tau decays
Yohei Ema, Patrick J. Fox, Matheus Hostert +4
Dark particles with lepton-flavor-violating couplings to the tau lepton can induce rare neutrinoless decays with large final state multiplicities. We study models where transi…
Freeze-in dark matter in neutron stars
Maxim Pospelov, Samya Roychowdhury
Every neutron star is born in the process of core-collapse supernova explosion that, for a brief moment, reproduces conditions of the early Universe with temperatures $T\sim O(30\r…
Long-lived Axion-Like Particles from Tau Decays
Yohei Ema, Patrick J. Fox, Matheus Hostert +4
Axion-like particles (ALPs) are well-motivated examples of light, weakly coupled particles in theories beyond the Standard Model. In this work, we study long-lived ALPs coupled exc…