Upper bound on the speed of sound in nuclear matter from transport

Mauricio Hippert, Jorge Noronha, Paul Romatschke

Research output: Contribution to journalArticlepeer-review

Abstract

We point out that there is an upper bound on the speed of sound squared given by cs2≤0.781 valid for all known systems described by relativistic transient hydrodynamics where calculations of certain ratios of hydrodynamic transport coefficients can be performed from first principles. Assuming this bound is valid for ultradense matter implies that the maximum mass of isolated (non-rotating) neutron stars cannot be larger than 2.7 solar masses.

Original languageEnglish (US)
Article number139184
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume860
DOIs
StatePublished - Jan 2025

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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