Do global string loops collapse to form black holes?

Joaquim Fort, Tanmay Vachaspati

Research output: Contribution to journalArticle

8 Scopus citations


Hawking has shown that the emission of gravitational radiation cannot prevent circular loops of gauged cosmic strings from collapsing into black holes. Here we consider the corresponding question for global strings: can Goldstone boson emission prevent circular loops of global cosmic strings from forming black holes? Our results show that for every value of the string tension there is a certain critical size below which the circular loop does not collapse to form a black hole. For GUT scale strings, this critical size is much larger than the current horizon.

Original languageEnglish (US)
Pages (from-to)41-46
Number of pages6
JournalPhysics Letters B
Issue number1-4
StatePublished - Jul 29 1993
Externally publishedYes


ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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