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In this work we use the equation of state (EOS) of (2+1)-flavor Nambu-Jona-Lasinio (NJL) model to study the structure of the strange quark star. With a new free parameter $\alpha$, the Lagrangian is constructed by two parts, the original…

High Energy Physics - Phenomenology · Physics 2020-03-25 Cheng-Ming Li , Shu-Yu Zuo , Yan Yan , Ya-Peng Zhao , Fei Wang , Yong-Feng Huang , Hong-Shi Zong

This study investigates the structural properties of strange quark stars (SQS) using a Quantum Chromodynamics (QCD) perturbative model combined with the latest Particle Data Group dataset. Given the energy scale present in compact stars,…

High Energy Astrophysical Phenomena · Physics 2025-01-30 J. Sedaghat , G. H. Bordbar , S. M. Zebarjad

We study the structure and total energy of a strange quark star (SQS) endowed with a strong magnetic field with different rotational frequencies. The MIT bag model is used, with the density-dependent bag constant for the equation of state…

High Energy Astrophysical Phenomena · Physics 2023-05-08 Fatemeh Kayanikhoo , Mateusz Kapusta , Miljenko Čemeljić

In this paper, we investigated the thermodynamic properties of strange quark matter using Nambu-Jona-Lasinio (NJL) model at finite temperatures where we considered the dynamical mass as the effective interaction between quarks. By…

Nuclear Theory · Physics 2019-05-22 G. H. Bordbar , R. Hosseini , F. Kayanikhoo , A. Poostforush

We investigate the effects of non-Newtonian gravity on the properties of strange quark stars (QSs) and constrain the parameters of the standard MIT bag model used to describe strange quark matter (SQM) by employing the mass of PSR…

High Energy Astrophysical Phenomena · Physics 2020-10-14 Shu-Hua Yang , Chun-Mei PI , Xiao-Ping Zheng , Fridolin Weber

We investigate effects of the modified $f(R, \mathcal{T})$ gravity on the charged strange quark stars with the standard choice of $f(R, \mathcal{T})=R+2\chi \mathcal{T}$. Those types of stars are supposed to be made of strange quark matter…

General Relativity and Quantum Cosmology · Physics 2019-11-06 Debabrata Deb , Sergei V. Ketov , Maxim Khlopov , Saibal Ray

The recent discovery of gravitational waves (GWs) has opened a new avenue for investigating the equation of state (EOS) of dense matter in compact stars, which is an outstanding problem in astronomy and nuclear physics. In the future,…

High Energy Astrophysical Phenomena · Physics 2024-11-26 Ziming Wang , Yong Gao , Dicong Liang , Junjie Zhao , Lijing Shao

We investigate the structural parameters of strange quark stars (SQS) under the influence of strong magnetic fields and varying rotational frequencies. The equation of state is computed using the MIT bag model with a density-dependent bag…

High Energy Astrophysical Phenomena · Physics 2026-01-15 Fatemeh Kayanikhoo , Mateusz Kapusta , Miljenko Čemeljić , Leszek Zdunik

This study describes the impact of non-zero value of strange quark mass $(m_{s})$ and number density of baryons $(n)$ on the structure, stability and maximum mass of strange stars. We derive an exact relativistic solution of the Einstein…

General Relativity and Quantum Cosmology · Physics 2025-01-22 Pradip Kumar Chattopadhyay , Debadri Bhattacharjee

Recent observations of massive pulsars having masses of the order of two solar mass pose a new challenge for compact objects such as hybrid stars and neutron stars. Extensions of the bag model and the Nambu-Jona-Lasino model have been used…

Nuclear Theory · Physics 2021-08-05 Salil Joshi , Sovan Sau , Soma Sanyal

The recent observation of the pulsar PSR J1614-2230 with a mass of 1.97 +/- 0.04 M_sun gives a strong constraint on the quark and nuclear matter equations of state (EoS). We explore the parameter ranges for a parameterized EoS for quark…

High Energy Astrophysical Phenomena · Physics 2011-10-11 Simon Weissenborn , Irina Sagert , Giuseppe Pagliara , Matthias Hempel , Jürgen Schaffner-Bielich

The observations of compact star inspirals from LIGO/Virgo provide a valuable tool to study the highly uncertain equation of state (EOS) of dense matter at the densities in which the compact stars reside. It is not clear whether the merging…

High Energy Astrophysical Phenomena · Physics 2021-08-19 Zhiqiang Miao , Jin-Liang Jiang , Ang Li , Lie-Wen Chen

The fundamental strong interaction determines the nature of pulsar-like compact stars which are essentially in the form of bulk strong matter. From an observational point of view, it is proposed that bulk strong matter could be composed of…

High Energy Astrophysical Phenomena · Physics 2019-05-22 Xiaoyu Lai , Enping Zhou , Renxin Xu

Using a density dependent quark mass (QMDD) model for strange quark matter, we investigate the effects of non-Newtonian gravity on the properties of strange stars and constrain the parameters of the QMDD model by employing the mass of PSR…

High Energy Astrophysical Phenomena · Physics 2021-03-03 Shu-Hua Yang , Chun-Mei Pi , Xiao-Ping Zheng , Fridolin Weber

The properties of strange quark stars are studied within the quasi-particle model. Taking into account the chemical equilibrium and charge neutrality, the EOS of $ (2+1) $-flavor quark matter is obtained. We illustrate the parameter spaces…

High Energy Physics - Phenomenology · Physics 2020-11-10 Wen-Hua Cai , Qing-Wu Wang

This paper presents a novel anisotropic quark star model in the backdrop of mimetic gravitational theory. Our study focuses on the strange quark stars using the MIT bag equation of state (EoS) admitting non-singular Buchdahl metric…

General Relativity and Quantum Cosmology · Physics 2025-09-16 Meghanil Sinha , S. Surendra Singh

The quark matter equation of state (EOS) derived from the standard Nambu - Jona-Lasinio (NJL) model is soft enough to render neutron stars (NS) unstable at the onset of the deconfined phase, and no pure quark matter can be actually present…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Baldo , G. F. Burgio , P. Castorina , S. Plumari , D. Zappala'

In the present paper, we treat the problem of the existence of quark stars (QSs) for selected homogeneous and unpaired charge-neutral $3$-flavor interacting quark matter with $\mathcal{O}(m_s^4)$ corrections equations of state (EoS). Using…

General Relativity and Quantum Cosmology · Physics 2021-06-02 Grigoris Panotopoulos , Takol Tangphati , Ayan Banerjee , M. K. Jasim

The strong-field gravity in General Relativity (GR) realized in neutron stars (NSs) renders the Equation of State (EOS) $P(\varepsilon)$ of supradense neutron star (NS) matter to be essentially nonlinear and refines the upper bound for…

High Energy Astrophysical Phenomena · Physics 2024-12-12 Bao-Jun Cai , Bao-An Li

This work studies the influence of scalar dark matter on the structural properties of strange quark stars (SQS) within a one-fluid framework, considering Yukawa interactions between dark matter and quark matter. Contributions from…

High Energy Physics - Phenomenology · Physics 2025-03-14 J. Sedaghat , G. H. Bordbar , M. Haghighat , S. M. Zebarjad
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