Implications of PREX-2 on the Equation of State of Neutron-Rich Matter.
| Autor: | Reed BT; Department of Astronomy, Indiana University, Bloomington, Indiana 47405, USA.; Center for Exploration of Energy and Matter and Department of Physics, Indiana University, Bloomington, Indiana 47405, USA., Fattoyev FJ; Department of Physics, Manhattan College, Riverdale, New York 10471, USA., Horowitz CJ; Center for Exploration of Energy and Matter and Department of Physics, Indiana University, Bloomington, Indiana 47405, USA., Piekarewicz J; Department of Physics, Florida State University, Tallahassee, Florida 32306, USA. |
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| Jazyk: | angličtina |
| Zdroj: | Physical review letters [Phys Rev Lett] 2021 Apr 30; Vol. 126 (17), pp. 172503. |
| DOI: | 10.1103/PhysRevLett.126.172503 |
| Abstrakt: | 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 ^{208}Pb (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. |
| Databáze: | MEDLINE |
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