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

被引：4
作者：
Hippert, Mauricio [1 ,2 ,3 ]
Noronha, Jorge [1 ,2 ]
Romatschke, Paul [4 ,5 ]
机构：
[1] Urbana Champaign Univ Illinois, Illinois Ctr Adv Studies Universe, Urbana, IL 61801 USA
[2] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
[3] Univ Estado Rio de Janeiro, Inst Fis, Rua Sao Francisco Xavier 524, BR-20550013 Rio De Janeiro, RJ, Brazil
[4] Univ Colorado, Dept Phys, Boulder, CO 80309 USA
[5] Univ Colorado, Ctr Theory Quantum Matter, Boulder, CO 80309 USA
来源：
PHYSICS LETTERS B | 2025年 / 860卷
基金：
美国国家科学基金会;
关键词：
EQUATION-OF-STATE; CAUSALITY; STABILITY; MASS; QCD;
D O I：
10.1016/j.physletb.2024.139184
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We point out that there is an upper bound on the speed of sound squared given by cs2 <= 0.781valid 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.
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页数：7
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