Pseudoscalar mesons from a PNJL model at zero temperature

IF 4.2 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2024-10-16 DOI:10.1140/epjc/s10052-024-13447-5

R. M. Aguirre, O. Lourenço

引用次数: 0

Abstract

We study pseudoscalar \(\pi \), K and \(\eta \) meson properties, such as masses and couplings, in dense matter at zero temperature. We use a recently proposed phenomenological quark model, known as the PNJL0, which takes into account the confinement/deconfinement phase transition by means of the traced Polyakov loop (\(\varPhi \)) which serves as an order parameter at zero temperature. We consider two different scenarios, namely, symmetric quark matter with equal chemical potentials for all the flavors, and the beta equilibrated matter. In the latter case the hadron-quark phase transition is implemented by a two model approach. For the hadron side we use a relativistic mean-field model with density dependent couplings. We show that \(\varPhi \) induces abrupt changes in the mesons properties with gap sizes regulated by the phenomenological gluonic sector of the model.

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来自零温下 PNJL 模型的伪谱介子

我们研究了零温度下致密物质中的假（\pi \）、K和（\eta \）介子的性质，如质量和耦合。我们使用了一个最近提出的现象学夸克模型，即PNJL0，它通过作为零温度下阶参数的波利亚科夫环（\(\varPhi \)）来考虑约束/解约束相变。我们考虑了两种不同的情况，即所有味道的化学势相等的对称夸克物质和β平衡物质。在后一种情况下，强子-夸克相变是通过两种模型方法实现的。在强子方面，我们使用了一个与密度相关耦合的相对论均场模型。我们证明了（\\varPhi \）会引起介子性质的突然变化，其间隙大小由模型的现象学胶子部门调节。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.