Электронный каталог

Статья

Le Joubioux, M.
Search for a Neutron Dark Decay in *6He / M.Le Joubioux, Yu.E.Penionzhkevich, S.Lukyanov, V.Smirnov, D.Testov, [a.o.] // Physical Review Letters [Electronic resource]. – 2024. – Vol. 132, No. 13. – P. 132501. – URL: https://doi.org/10.1103/PhysRevLett.132.132501. – Bibliogr.: 45.

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 of *6He into *4He + n + *c provides an exceptionally clean detection signature when combined with a high efficiency neutron detector. Using a high-intensity *6He+ beam at Grand Accélérateur National d’Ions Lourds, a search for a coincident neutron signal resulted in an upper limit on a dark decay branching ratio of Br&sub(*c) ≤ 4.0 × 10&sup(−10) (95% C.L.). Using the dark neutron decay model proposed originally by Fornal and Grinstein, we translate this into an upper bound on a dark neutron branching ratio of O(10&sup(−5)), improving over global constraints by one to several orders of magnitude depending on m&sub(*c).



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 341.1 - Радиоактивность$
Бюллетени = 23/024