Dark Matter Interpretation of the Neutron Decay Anomaly

Abstract

There is a long-standing discrepancy between the neutron lifetime measured in beam and bottle experiments. We propose to explain this anomaly by a dark decay channel for the neutron, involving one or more dark sector particles in the final state. If any of these particles are stable, they can be the dark matter. We construct representative particle physics models consistent with all experimental constraints.

5 pages, 2 figures; v2: references added, further nuclear physics experimental signatures proposed; v3: published PRL version with an extended section on $n\to \chi e^{+}{e}^{-}$ and some inline equations highlighted for visibility

References in corpus (16)

• Search for dark matter and other new phenomena in events with an energetic jet and large missing transverse momentum using the ATLAS detector
• Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models
• Search for Proton Decay via $p\to e^{+}{\pi }^0$ and $p\to {\mu }^{+}{\pi }^0$ in 0.31 megaton$\cdot$years exposure of the Super-Kamiokande Water Cherenkov Detector
• Neutron -- Mirror Neutron Oscillation: How Fast Might It Be?
• Viscoelastic hydrodynamics and holography
• Simplified models with baryon number violation but no proton decay
• Neutron stars exclude light dark baryons
• Search for pair-produced resonances decaying to jet pairs in proton-proton collisions at sqrt(s) = 8 TeV
• A search for pair-produced resonances in four-jet final states at $\sqrt{s}$ =13 TeV with the ATLAS detector
• A Simple Testable Model of Baryon Number Violation: Baryogenesis, Dark Matter, Neutron-Antineutron Oscillation and Collider Signals
• Search for dinucleon decay into pions at Super-Kamiokande
• On the possibility to observe neutron dark decay in nuclei
• Beta-delayed deuteron emission from 11Li: decay of the halo
• Nucleon Decay into Dark Sector
• SU(5) Unification without Proton Decay
• The impact of theoretical assumptions in the determination of the neutrino effective number from future CMB measurements

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