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Dark sectors in neutron-shining-through-a-wall and nuclear-absorption signals

Hostert, M and McKeen, D and Pospelov, M and Raj, N (2023) Dark sectors in neutron-shining-through-a-wall and nuclear-absorption signals. In: Physical Review D, 107 (7).

phy_rev_107-7_2023.pdf - Published Version

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Official URL: https://doi.org/10.1103/PhysRevD.107.075034


We propose new searches for n′, a dark baryon that can mix with the Standard Model neutron. We show that IsoDAR, a proposal to place an intense cyclotron near a large-volume neutrino detector deep underground, can look for n→n′→n transitions with much lower backgrounds than surface experiments. This opportune neutron-shining-through-a-wall search would be possible without any modifications to the primary goals of the experiment and would provide the strongest laboratory constraints on the n-n′ mixing for a wide range of mass splitting. We also consider dark neutrons as dark matter and show that their nuclear absorption at deep-underground detectors such as SNO and Borexino places some of the strongest limits in parameter space. Finally, we describe other n′ signatures, such as neutrons shining through walls at spallation sources, reactors, and the disappearance of ultracold neutrons.

Item Type: Journal Article
Publication: Physical Review D
Publisher: American Physical Society
Additional Information: The copyright for this article belongs to the Authors.
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 15 Jun 2023 08:00
Last Modified: 15 Jun 2023 08:00
URI: https://eprints.iisc.ac.in/id/eprint/81963

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