### Abstract

Many-brane Universes are at the heart of several cosmological scenarios related to physics beyond the Standard Model. It is then a major concern to constrain these approaches. Two-brane Universes involving SO(3, 1)-broken 5D bulks are among the cosmological models of interest. They also allow considering matter exchange between branes, a possible way to test these scenarios. Neutron disappearance (reappearance) toward (from) the hidden brane is currently tested with high-precision experiments to constrain the coupling constant g between the visible and hidden neutron sectors. When dealing with the sub-GeV-scale quantum dynamics of fermions, any pair of braneworlds can be described by a noncommutative two-sheeted space-time M4 × Z2 from which g emerges. Nevertheless, the calculation of the formal link between g for a neutron and SO(3, 1)-broken 5D bulks remains an open problem until now although necessary to constrain these braneworld scenarios. Thanks to a phenomenological model, we derive g - for a neutron - between the two braneworlds endowed with their own copy of the Standard Model in an SO(3, 1)-broken 5D bulk. Constraints on interbrane distance and brane energy scale (or brane thickness) are discussed. While brane energy scale below the GUT scale is excluded, energy scale up to the Planck limit allows neutron swapping detection in forthcoming experiments.

Original language | English |
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Article number | 1950029 |

Number of pages | 18 |

Journal | International Journal of Modern Physics A |

Volume | 34 |

Issue number | 5 |

DOIs | |

Publication status | Published - 20 Feb 2019 |

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### Keywords

- Brane phenomenology
- hidden braneworld
- neutron disappearance-reappearance
- neutron-hidden neutron

### Cite this

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**Sub-GeV-scale signatures of hidden braneworlds up to the Planck scale in a SO(3, 1)-broken bulk.** / Stasser, Coraline; Sarrazin, Michaël.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Sub-GeV-scale signatures of hidden braneworlds up to the Planck scale in a SO(3, 1)-broken bulk

AU - Stasser, Coraline

AU - Sarrazin, Michaël

PY - 2019/2/20

Y1 - 2019/2/20

N2 - Many-brane Universes are at the heart of several cosmological scenarios related to physics beyond the Standard Model. It is then a major concern to constrain these approaches. Two-brane Universes involving SO(3, 1)-broken 5D bulks are among the cosmological models of interest. They also allow considering matter exchange between branes, a possible way to test these scenarios. Neutron disappearance (reappearance) toward (from) the hidden brane is currently tested with high-precision experiments to constrain the coupling constant g between the visible and hidden neutron sectors. When dealing with the sub-GeV-scale quantum dynamics of fermions, any pair of braneworlds can be described by a noncommutative two-sheeted space-time M4 × Z2 from which g emerges. Nevertheless, the calculation of the formal link between g for a neutron and SO(3, 1)-broken 5D bulks remains an open problem until now although necessary to constrain these braneworld scenarios. Thanks to a phenomenological model, we derive g - for a neutron - between the two braneworlds endowed with their own copy of the Standard Model in an SO(3, 1)-broken 5D bulk. Constraints on interbrane distance and brane energy scale (or brane thickness) are discussed. While brane energy scale below the GUT scale is excluded, energy scale up to the Planck limit allows neutron swapping detection in forthcoming experiments.

AB - Many-brane Universes are at the heart of several cosmological scenarios related to physics beyond the Standard Model. It is then a major concern to constrain these approaches. Two-brane Universes involving SO(3, 1)-broken 5D bulks are among the cosmological models of interest. They also allow considering matter exchange between branes, a possible way to test these scenarios. Neutron disappearance (reappearance) toward (from) the hidden brane is currently tested with high-precision experiments to constrain the coupling constant g between the visible and hidden neutron sectors. When dealing with the sub-GeV-scale quantum dynamics of fermions, any pair of braneworlds can be described by a noncommutative two-sheeted space-time M4 × Z2 from which g emerges. Nevertheless, the calculation of the formal link between g for a neutron and SO(3, 1)-broken 5D bulks remains an open problem until now although necessary to constrain these braneworld scenarios. Thanks to a phenomenological model, we derive g - for a neutron - between the two braneworlds endowed with their own copy of the Standard Model in an SO(3, 1)-broken 5D bulk. Constraints on interbrane distance and brane energy scale (or brane thickness) are discussed. While brane energy scale below the GUT scale is excluded, energy scale up to the Planck limit allows neutron swapping detection in forthcoming experiments.

KW - Brane phenomenology

KW - hidden braneworld

KW - neutron disappearance-reappearance

KW - neutron-hidden neutron

UR - https://arxiv.org/abs/1612.02225

UR - http://www.scopus.com/inward/record.url?scp=85062395775&partnerID=8YFLogxK

U2 - 10.1142/S0217751X19500295

DO - 10.1142/S0217751X19500295

M3 - Article

VL - 34

JO - International Journal of Modern Physics A

JF - International Journal of Modern Physics A

SN - 0217-751X

IS - 5

M1 - 1950029

ER -