Actions for Sound Velocity Bound and Neutron Stars [electronic resource].

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Sound Velocity Bound and Neutron Stars [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Nuclear Physics, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 031,103 : digital, PDF file
Additional Creators
Oak Ridge National Laboratory, United States. Department of Energy. Office of Nuclear Physics, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A conjecture that the velocity of sound in any medium is smaller than the velocity of light in vacuum divided by sqrt(3). Simple arguments support this bound in nonrelativistic and/or weakly coupled theories. Moreover, the bound has been demonstrated in several classes of strongly coupled theories with gravity duals and is saturated only in conformal theories. Here, we point out that the existence of neutron stars with masses around two solar masses combined with the knowledge of the equation of state of hadronic matter at low densities is in strong tension with this bound.
Report Numbers
E 1.99:int-pub--14-021
int-pub--14-021
Subject(s)
Note
Published through SciTech Connect.
01/21/2015.
"int-pub--14-021"
Physical Review Letters 114 3 ISSN 0031-9007 AM
Paulo Bedaque; Andrew W. Steiner.
Funding Information
AC05-00OR22725
View MARC record | catkey: 23495025