Delta isobars in relativistic mean-field models with σ-scaled hadron masses and couplings

被引：59
|
作者：
Kolomeitsev, E. E. [1 ]
Maslov, K. A. [2 ]
Voskresensky, D. N. [2 ]
机构：
[1] Matej Bel Univ, SK-97401 Banska Bystrica, Slovakia
[2] Natl Res Nucl Univ MEPhI, RU-115409 Moscow, Russia
来源：
NUCLEAR PHYSICS A | 2017年 / 961卷
基金：
俄罗斯基础研究基金会;
关键词：
Dense matter; Nuclear equation of state; Delta(1232) baryons; Neutron star mass; EQUATION-OF-STATE; NEUTRON-STARS; NUCLEAR-MATTER; RADIUS CONSTRAINTS; DENSE MATTER; SUM-RULES; SYMMETRY; HYPERONS; BARYON; PHYSICS;
D O I：
10.1016/j.nuclphysa.2017.02.004
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We extend the relativistic mean-field models with hadron masses and meson-baryon coupling constants dependent on the scalar sigma field, studied previously to incorporate Delta(1232) baryons. Available empirical information is analyzed to put constraints on the couplings of Delta s with meson fields. Conditions for the appearance of Delta s are studied. We demonstrate that with inclusion of the Delta s our equations of state continue to fulfill majority of known empirical constraints including the pressure-density constraint from heavy-ion collisions, the constraint on the maximum mass of the neutron stars, the direct Urea and the gravitational baryon mass ratio constraints. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：106 / 141
页数：36
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