Metastable strings and grand unification

Autor:	Buchmuller, Wilfried
Rok vydání:	2024
Předmět:	High Energy Physics - Phenomenology Astrophysics - Cosmology and Nongalactic Astrophysics High Energy Physics - Theory
Druh dokumentu:	Working Paper
Popis:	The structure of the Standard Model (SM) of particle physics points toward grand unified theories (GUTs) where strong and electroweak interactions are unified in a non-Abelian GUT group. The spontaneous breaking of the GUT symmetry to the SM symmetry, together with cosmic inflation, generically leads to metastable topological defects, the most prominent example being cosmic strings. The gravitational-wave background (GWB) produced by a cosmic string network is one of the candidates for an explanation of the GWB recently observed by pulsar timing array (PTA) experiments. We review some properties of the predicted GWB with emphasis on potential implications for GUT model building. The most striking prediction is a GWB in the LIGO-Virgo-KAGRA band that could be discovered in the near future. Comment: 15 pages, 6 figures; Rubakov conference, Yerevan. arXiv admin note: text overlap with arXiv:2307.04691
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2401.13333 Zobrazit plný text záznamu View this record from Arxiv