Search for passing-through-walls neutrons constrains hidden braneworlds

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 p2p2 of such an event. The limit, p<4.6×10−10p<4.6×10−10 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>87d>87 in Planck length units
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Submitted on : Thursday, April 28, 2016 - 3:10:47 PM
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M. Sarrazin, G. Pignol, J. Lamblin, J. Pinon, O. Méplan, et al.. Search for passing-through-walls neutrons constrains hidden braneworlds. Physics Letters B, Elsevier, 2016, 758, pp.14-17. ⟨10.1016/j.physletb.2016.04.045⟩. ⟨in2p3-01308849⟩



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