期刊
PHYSICS LETTERS B
卷 809, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2020.135764
关键词
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资金
- Deutsche Forschungsgemeinschaft under Germany's Excellence Strategy [EXC 2121, 390833306]
- European Union's Horizon 2020 Research and Innovation Programme [796961]
- NSF [PHY-1915314]
- U.S. DOE Contract [DEAC02-05CH11231]
- JSPS [JP17K05409]
- MEXT [JP15H05887, JP15K21733]
- WPI, MEXT, Japan
- Hamamatsu Photonics
The spontaneous breaking of U(1)(B-L) around the scale of grand unification can simultaneously account for hybrid inflation, leptogenesis, and neutralino dark matter, thus resolving three major puzzles of particle physics and cosmology in a single predictive framework. The B-L phase transition also results in a network of cosmic strings. If strong and electroweak interactions are unified in an S O (10) gauge group, containing U(1)(B-L) as a subgroup, these strings are metastable. In this case, they produce a stochastic background of gravitational waves that evades current pulsar timing bounds, but features a flat spectrum with amplitude h(2)Omega(GW) similar to 10(-8) at interferometer frequencies. Ongoing and future LIGO observations will hence probe the scale of B - L breaking. (C) 2020 The Author(s). Published by Elsevier B.V.
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