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arXiv · 1604.07861

Search for passing-through-walls neutrons constrains hidden braneworlds

Michael Sarrazin·Guillaume Pignol·Jacob Lamblin·Jonhathan Pinon·Olivier Meplan·Guy Terwagne·Paul-Louis Debarsy·Fabrice Petit·Valery V. Nesvizhevsky
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Abstract

In many theoretical frameworks our visible world is a $3$-brane, embedded in a multidimensional bulk, possibly coexisting with hidden braneworlds. Some works have also shown that matter swapping between braneworlds can occur. Here we report the results of an experiment - at the Institut Laue-Langevin (Grenoble, France) - designed to detect thermal neutron swapping to and from another braneworld, thus constraining the probability $p^2$ of such an event. The limit, $p<4.6\times 10^{-10}$ at $95 \%$ C.L., is $4$ orders of magnitude better than the previous bound based on the disappearance of stored ultracold neutrons. In the simplest braneworld scenario, for two parallel Planck-scale branes separated by a distance $d$, we conclude that $d>87$ in Planck length units.

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Michael Sarrazin, Guillaume Pignol, Jacob Lamblin, Jonhathan Pinon, Olivier Meplan, Guy Terwagne, Paul-Louis Debarsy, Fabrice Petit, Valery V. Nesvizhevsky. 2016-04-26. Search for passing-through-walls neutrons constrains hidden braneworlds. https://doi.org/10.1016/j.physletb.2016.04.045

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