Particle production scenario in an algebraically coupled quintessence field with a dark matter fluid

IF 4.6 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Saddam Hussain
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引用次数: 0

Abstract

We investigate the dynamics of an algebraically coupled quintessence field with a dark matter fluid, focusing on particle production through the action principle via a modified interaction Lagrangian. The interaction parameter serves as the source of dark matter particle production and entropy generation. As particle creation occurs due to the interaction between the field and fluid sectors, the system exhibits additional pressure. Our analysis includes studying the system’s dynamics by considering an exponential type of interaction corresponding to the field’s exponential potential. We assess the system’s background dynamics using the dynamical system stability technique to derive the constraints on the model parameters. Additionally, we determine the best-fit values of the model parameters against two combinations of data sets: (i) Cosmic Chronometer (CC) + Pantheon + SH0ES, and (ii) CC + Pantheon + SH0ES + SDSS BAO + DESI BAO. By employing a comprehensive data analysis technique, we compare the evidence of our models to flat ΛCDM. Based on the Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC), one of the models emerges as a robust alternative to ΛCDM when considering the joint data sets.

Abstract Image

具有暗物质流体的代数耦合精粹场中的粒子产生场景
我们研究了与暗物质流体代数耦合的精质场的动力学,重点研究了通过修正的相互作用拉格朗日量通过作用原理产生的粒子。相互作用参数是暗物质粒子产生和熵产生的来源。由于油田和流体之间的相互作用,产生了颗粒,系统会产生额外的压力。我们的分析包括通过考虑与场的指数势相对应的指数型相互作用来研究系统的动力学。我们利用动力系统稳定性技术来评估系统的背景动力学,从而得出模型参数的约束条件。此外,我们根据两种数据集组合确定模型参数的最佳拟合值:(i) Cosmic Chronometer (CC) + Pantheon + SH0ES,以及(ii) CC + Pantheon + SH0ES + SDSS BAO + DESI BAO。通过采用综合数据分析技术,我们将模型的证据与平坦ΛCDM进行比较。基于赤池信息准则(AIC)和贝叶斯信息准则(BIC),其中一个模型在考虑联合数据集时作为ΛCDM的鲁棒替代方案出现。
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来源期刊
Chinese Journal of Physics
Chinese Journal of Physics 物理-物理:综合
CiteScore
8.50
自引率
10.00%
发文量
361
审稿时长
44 days
期刊介绍: The Chinese Journal of Physics publishes important advances in various branches in physics, including statistical and biophysical physics, condensed matter physics, atomic/molecular physics, optics, particle physics and nuclear physics. The editors welcome manuscripts on: -General Physics: Statistical and Quantum Mechanics, etc.- Gravitation and Astrophysics- Elementary Particles and Fields- Nuclear Physics- Atomic, Molecular, and Optical Physics- Quantum Information and Quantum Computation- Fluid Dynamics, Nonlinear Dynamics, Chaos, and Complex Networks- Plasma and Beam Physics- Condensed Matter: Structure, etc.- Condensed Matter: Electronic Properties, etc.- Polymer, Soft Matter, Biological, and Interdisciplinary Physics. CJP publishes regular research papers, feature articles and review papers.
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