Probing neutron-hidden neutron transitions with the MURMUR experiment
Autor: | Coraline Stasser, Guy Terwagne, Jacob Lamblin, Olivier Méplan, Guillaume Pignol, Bernard Coupé, Silva Kalcheva, Steven Van Dyck, Michaël Sarrazin |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: | |
Zdroj: | European Physical Journal C: Particles and Fields, Vol 81, Iss 1, Pp 1-14 (2021) |
Druh dokumentu: | article |
ISSN: | 1434-6044 1434-6052 |
DOI: | 10.1140/epjc/s10052-021-08829-y |
Popis: | Abstract MURMUR is a new passing-through-walls neutron experiment designed to constrain neutron-hidden neutron transitions allowed in the context of braneworld scenarios or mirror matter models. A nuclear reactor can act as a source of hidden neutrons, such that neutrons travel through a hidden world or sector. Hidden neutrons can propagate out of the nuclear core and far beyond the biological shielding. However, hidden neutrons can weakly interact with usual matter, making possible for their detection in the context of low-noise measurements. In the present work, the novelty rests on a better background discrimination and the use of a mass of a material – here lead – able to enhance regeneration of hidden neutrons into visible ones to improve detection. The input of this new setup is studied using both modelizations and experiments, thanks to tests currently performed with the experiment at the BR2 research nuclear reactor (SCK $$\cdot $$ · CEN, Mol, Belgium). A new limit on the neutron swapping probability p has been derived thanks to the measurements taken during the BR2 Cycle 02/2019A: $$p |
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