Bulk viscosity of strange quark matter: Urca versus nonleptonic processes

Basil A. Sa'd, Igor A. Shovkovy, Dirk H. Rischke

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


A general formalism for calculating the bulk viscosity of strange quark matter is developed. Contrary to the common belief that the nonleptonic processes alone give the dominant contribution to the bulk viscosity, the inclusion of the Urca processes is shown to play an important role at intermediate densities when the characteristic r-mode oscillation frequencies are not too high. The interplay of nonleptonic and Urca processes is analyzed in detail.

Original languageEnglish (US)
Article number125004
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number12
StatePublished - Jun 4 2007
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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