Search for passing-through-walls neutrons constrains hidden braneworlds

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• 作者：Michaë ; l Sarrazin^a ; ^{michael.sarrazin@unamur.be" class="auth_mail" title="E-mail the corresponding author} ; Guillaume Pignol^b ; ^{guillaume.pignol@lpsc.in2p3.fr" class="auth_mail" title="E-mail the corresponding author} ; Jacob Lamblin^b ; Jonhathan Pinon^b ; Olivier Mé ; plan^b ; Guy Terwagne^c ; Paul-Louis Debarsy^c ; Fabrice Petit^d ; Valery V. Nesvizhevsky^e
• 关键词：Brane phenomenology ; Braneworlds ; Matter disappearance&ndash ; reappearance ; Neutron
• 刊名：Physics Letters B
• 出版年：2016
• 出版时间：10 July 2016
• 年：2016
• 卷：758
• 期：Complete
• 页码：14-17
• 全文大小：967 K

文摘

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 p²$p^2$ of such an event. The limit, p<4.6×10⁻¹⁰$p<4.6\times {10}^{-10}$ 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$d>87$ in Planck length units.