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 p2 of such an event. The limit, p < 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 > 87 in Planck length units.
- Publication:
-
Physics Letters B
- Pub Date:
- July 2016
- DOI:
- 10.1016/j.physletb.2016.04.045
- arXiv:
- arXiv:1604.07861
- Bibcode:
- 2016PhLB..758...14S
- Keywords:
-
- Brane phenomenology;
- Braneworlds;
- Matter disappearance-reappearance;
- Neutron;
- High Energy Physics - Experiment;
- High Energy Physics - Phenomenology;
- Nuclear Experiment
- E-Print:
- 5 pages, 3 figures. Published in Physics Letters B