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Recent proposals have suggested that a previously unknown decay mode of the neutron into a dark matter particle could solve the long lasting measurement problem of the neutron decay width. We show that, if the dark particle in neutron decay…

Nuclear Theory · Physics 2018-11-09 T. F. Motta , P. A. M. Guichon , A. W. Thomas

There exists a puzzling disagreement between the results for the neutron lifetime obtained in experiments using the beam technique versus those relying on the bottle method. A possible explanation of this discrepancy postulates the…

High Energy Physics - Phenomenology · Physics 2023-10-18 Bartosz Fornal

The existing discrepancy between neutron lifetime measurements in bottle and beam experiments has been interpreted as a sign of the neutron decaying to dark particles. We summarize the current status of this proposal, including a discussion…

High Energy Physics - Phenomenology · Physics 2020-10-13 Bartosz Fornal , Benjamin Grinstein

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…

High Energy Physics - Phenomenology · Physics 2018-05-10 Bartosz Fornal , Benjamin Grinstein

It was recently suggested that the discrepancy between two methods of measuring the lifetime of the neutron may be a result of an unseen decay mode into a dark matter particle which is almost degenerate with the neutron. We explore the…

Nuclear Theory · Physics 2018-05-09 T. F. Motta , P. A. M. Guichon , A. W. Thomas

Inspired by the well known anomaly in the life time of the neutron, we investigate its consequences inside neutron stars. We first assess the viability of the neutron decay hypothesis suggested by Fornal and Grinstein within neutrons tars,…

High Energy Physics - Phenomenology · Physics 2023-06-16 Wasif Husain , Dipan Sengupta , A W Thomas

Neutron dark decays have been suggested as a solution to the discrepancy between bottle and beam experiments, providing a dark matter candidate that can be searched for in halo nuclei. The free neutron in the final state following the decay…

In a recent paper submitted to Physical Review Letters, Fornal and Grinstein have suggested that the discrepancy between two different methods of neutron lifetime measurements, the beam and bottle methods can be explained by a previously…

In the present work we examine the implications on dark matter searches of the possibility of a partial decay of a neutron into a dark matter particle, slightly lighter than itself. Such a scenario recently proposed is required to bridge…

High Energy Physics - Phenomenology · Physics 2020-05-15 J. D. Vergados

We discuss our recently proposed interpretation of the discrepancy between the bottle and beam neutron lifetime experiments as a sign of a dark sector. The difference between the outcomes of the two types of measurements is explained by the…

High Energy Physics - Phenomenology · Physics 2018-12-12 Bartosz Fornal , Benjamin Grinstein

We summarize our recent proposal of explaining the discrepancy between the bottle and beam measurements of the neutron lifetime through the existence of a dark sector, which the neutron can decay to with a branching fraction 1%. We show…

High Energy Physics - Phenomenology · Physics 2018-11-07 Bartosz Fornal , Benjamin Grinstein

We analyse the discrepancy between the neutron lifetimes measured in the bottle and beam experiments. Following Fornal and Grinstein (Phys. Rev. Lett. 120, 191801 (2018)) we propose an explanation of such a puzzle by the dark matter…

High Energy Physics - Phenomenology · Physics 2018-10-02 A. N. Ivanov , R. Höllwieser , N. I. Troitskaya , M. Wellenzohn , Ya. A. Berdnikov

The hypothesis that neutrons might decay into dark matter is explored using neutron stars as a testing ground. It is found that in order to obtain stars with masses at the upper end of those observed, the dark matter must experience a…

High Energy Physics - Phenomenology · Physics 2022-10-26 Wasif Husain , Theo F. Motta , Anthony W. Thomas

We explore the suggestion that the neutron lifetime puzzle might be resolved by neutrons decaying into dark matter through the process, n \rightarrow \chi\chi\chi, with \chi having a mass one third of that of the neutron. In particular, we…

High Energy Physics - Phenomenology · Physics 2022-12-14 Wasif Husain , Anthony W. Thomas

New decay channels for the neutron into dark matter plus other particles have been suggested for explaining a long-standing discrepancy between the neutron lifetime measured from trapped neutrons versus those decaying in flight. Many such…

High Energy Physics - Phenomenology · Physics 2018-07-16 James M. Cline , Jonathan M. Cornell

Recent observational results for the masses and radii of some neutron stars are in contrast with typical observations and theoretical predictions for "normal" neutron stars. We propose that their unusual properties can be interpreted as the…

High Energy Astrophysical Phenomena · Physics 2012-11-27 Paolo Ciarcelluti , Fredrik Sandin

It is possible that the strongest interactions between dark matter and the Standard Model occur via the neutrino sector. Unlike gamma rays and charged particles, neutrinos provide a unique avenue to probe for astrophysical sources of dark…

High Energy Physics - Phenomenology · Physics 2023-11-07 Carlos A. Argüelles , Diyaselis Delgado , Avi Friedlander , Ali Kheirandish , Ibrahim Safa , Aaron C. Vincent , Henry White

Precision measurements of neutron decay offer complementary access to particle physics at small distance scales or high energies. In particular they allow tests of the V-A structure of the weak interaction. Among many experimental…

High Energy Physics - Experiment · Physics 2007-05-23 Stephan Paul

A recent proposal suggests that experimental discrepancies on the lifetime of neutrons can be resolved if neutrons decay to dark matter. At the same time it has been demonstrated that such a decay mode would soften the nuclear equation of…

High Energy Physics - Phenomenology · Physics 2019-09-04 Benjamin Grinstein , Chris Kouvaris , Niklas Grønlund Nielsen

Discrepancies from in-beam and in-bottle type experiments measuring the neutron lifetime are on the 4$\sigma$ standard deviation level. In a recent publication Fornal and Grinstein proposed that the puzzle could be solved if the neutron…

High Energy Physics - Experiment · Physics 2019-06-12 M. Klopf , E. Jericha , B. Märkisch , H. Saul , T. Soldner , H. Abele
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