Instability of Higgs vacuum via string cloud

Issei Koga, Sachiko Kuroyanagi, Yutaka Ookouchi

Research output: Contribution to journalArticle


We study the instability of the Higgs vacuum caused by a cloud of strings. By catalysis, the decay rate of the vacuum is highly enhanced and, when the energy density of the cloud is larger than the critical value, a semi-classical vacuum decay occurs. We also discuss the relation between the string cloud and observational constraints on the cosmic strings from the viewpoint of the catalysis, which are converted into bounds on the parameters of the Higgs potential.

Original languageEnglish
Article number135093
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - Jan 10 2020


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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