TY  - JOUR
AU  - Jeong, K. S.
AU  - Park, W. I.
PY  - 2023
DA  - 2023//
TI  - Cosmology with a supersymmetric local B – L model
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 016
EP  - 34pp
VL  - 11
IS  - 11
PB  - IOP Publishing Ltd
KW  - cosmological phase transitions
KW  - gravitational waves / sources
KW  - physics of the early universe
KW  - supersymmetry and cosmology
AB  - We propose a minimal gauged U(1)(B-L) extension of the minimal supersymmetric Standard Model (MSSM) which resolves the cosmological moduli problem via thermal inflation, and realizes late-time Affleck-Dine leptogensis so as to generate the right amount of baryon asymmetry at the end of thermal inflation. The present relic density of dark matter can be explained by sneutrinos, MSSM neutralinos, axinos, or axions. Cosmic strings from U(1)(B-L) breaking are very thick, and so the expected stochastic gravitational wave background from cosmic string loops has a spectrum different from the one in the conventional Abelian-Higgs model, as would be distinguishable at least at LISA and DECIGO. The characteristic spectrum is due to a flat potential, and may be regarded as a hint of supersymmetry. Combined with the resolution of moduli problem, the expected signal of gravitational waves constrains the U(1)(B-L) breaking scale to be O(10(12-13)) GeV. Interestingly, our model provides a natural possibility for explaining the observed ultra-high-energy cosmic rays thanks to the fact that the core width of strings in our scenario is very large, allowing a large enhancement of particle emissions from the cusps of string loops. Condensation of LHu flat-direction inside of string cores arises inevitably and can also be the main source of the ultra-high-energy cosmic rays accompanied by ultra-high-energy lightest supersymmetric particles.
SN  - 1475-7516
UR  - https://arxiv.org/abs/2305.11143
UR  - https://doi.org/10.1088/1475-7516/2023/11/016
DO  - 10.1088/1475-7516/2023/11/016
LA  - English
N1  - WOS:001149204000015
ID  - Jeong+Park2023
ER  -