Implications of PREX-2 on the Equation of State of Neutron-Rich Matter

被引：417

作者：

Reed, Brendan T. ^{[1
,2
,3
]}

Fattoyev, F. J. ^{[4
]}

Horowitz, C. J. ^{[2
,3
]}

Piekarewicz, J. ^{[5
]}

机构：

[1] Indiana Univ, Dept Astron, Bloomington, IN 47405 USA

[2] Indiana Univ, Ctr Explorat Energy & Matter, Bloomington, IN 47405 USA

[3] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[4] Manhattan Coll, Dept Phys, Riverdale, NY 10471 USA

[5] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 17期

关键词：

SYMMETRY ENERGY; EMISSION; RADIUS; STARS;

D O I：

10.1103/PhysRevLett.126.172503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Laboratory experiments sensitive to the equation of state of neutron rich matter in the vicinity of nuclear saturation density provide the first rung in a "density ladder" that connects terrestrial experiments to astronomical observations. In this context, the neutron skin thickness of Pb-208 (R-skin(208)) provides a stringent laboratory constraint on the density dependence of the symmetry energy. In turn, an improved value of R(skin)(208 )has been reported recently by the PREX collaboration. Exploiting the strong correlation between R-skin(208) and the slope of the symmetry energy L within a specific class of relativistic energy density functionals, we report a value of L = (106 +/- 37) MeV-which systematically overestimates current limits based on both theoretical approaches and experimental measurements. The impact of such a stiff symmetry energy on some critical neutron-star observables is also examined.

引用

页数：5

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