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We simulate 3-flavour lattice QCD with a small chemical potential $\mu_I$ for isospin, at temperatures close to the finite temperature transition. Using quark masses just above the critical mass for zero chemical potential, we determine the…

High Energy Physics - Lattice · Physics 2014-11-17 J. B. Kogut , D. K. Sinclair

I make a brief review about the QCD phases and the equation of state inferred from the neutron star data. Along the temperature axis at low baryon density, the QCD phase transition is a smooth crossover, and it is a natural extension of our…

High Energy Physics - Phenomenology · Physics 2025-05-01 Kenji Fukushima

For small volume of the quark-gluon plasma formed in heavy ion collisions, the observable near criticality must obey finite-size scaling. According to the finite-size scaling, there exists a fixed point at the critical temperature, where…

High Energy Physics - Phenomenology · Physics 2018-11-30 Yan-Hua Zhang , Xue Pan , Li-Zhu Chen , Ming-Mei Xu , Zhi-Ming Li , Ye-Yin Zhao , Yuan-Fang Wu

The temperature and chemical potential dependent surface tension of bags is introduced into the gas of quark-gluon bags model. This resolves a long standing problem of a unified description of the first and second order phase transition…

High Energy Physics - Phenomenology · Physics 2008-11-26 Kyrill Bugaev

I review arguments for the existence of a critical point E in the QCD phase diagram as a function of temperature T and baryon chemical potential \mu. I describe how heavy ion collision experiments at the SPS and RHIC can discover the…

High Energy Physics - Phenomenology · Physics 2009-10-31 Krishna Rajagopal

Heavy-ion collisions performed in the beam energy range accessible by the NICA collider facility are expected to produce systems of extreme net-baryon densities and can thus reach yet unexplored regions of the QCD phase diagram. Here, one…

Nuclear Theory · Physics 2016-09-21 Marlene Nahrgang , Christoph Herold

We offer the parameter, interpreted as the "chemical potential", which is sensitive to the first order phase transition: it must decrease with number of evaporating (produced) particles (hadrons) if the (interacting hadron or/and QCD…

High Energy Physics - Phenomenology · Physics 2017-08-23 J. Manjavidze , A. Sissakian

For finite chemical potential effective models of QCD predict a first order phase transition. In favour for the search of such a phase transition in nature, we construct an equation of state for strange quark matter based on the MIT bag…

Solar and Stellar Astrophysics · Physics 2010-07-28 T. Fischer , I. Sagert , M. Hempel , G. Pagliara , J. Schaffner-Bielich , A. Mezzacappa , F. -K. Thielemann , M. Liebendorfer

In this paper, we employ the gauge/gravity duality to study jet quenching (JQ) phenomena in the quark-gluon plasma. For this purpose, we implement holographic QCD models constructed from an Einstein-Maxwell-dilaton gravity at finite…

High Energy Physics - Theory · Physics 2026-01-01 Irina Ya. Aref'eva , Ali Hajilou , Alexander Nikolaev , Pavel Slepov

I present the highlights of a recent study of the effective QCD phase diagram on the temperature T and quark chemical potential mu plane, where the strong interactions are modeled using the linear sigma model coupled to quarks. The phase…

High Energy Physics - Phenomenology · Physics 2015-09-03 Alejandro Ayala

The chiral crossover of QCD at finite temperature and vanishing baryon density turns into a second order phase transition if lighter than physical quark masses are considered. If this transition occurs sufficiently close to the physical…

We analyze the phase diagram of QCD with two massless quark flavors in the space of temperature, T, and chemical potential of the baryon charge, mu, using available experimental knowledge of QCD, insights gained from various models, as well…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. A. Halasz , A. D. Jackson , R. E. Shrock , M. A. Stephanov , J. J. M. Verbaarschot

We discuss the equation of state (EoS) for two flavor QCD at non-zero temperature and density. Derivatives of $\ln Z$ with respect to quark chemical potential $\mu_q$ are calculated up to sixth order. From this Taylor series, the pressure,…

High Energy Physics - Lattice · Physics 2017-08-23 S. Ejiri , C. R. Allton , M. Doering , S. J. Hands , O. Kaczmarek , F. Karsch , E. Laermann , K. Redlich

On the basis of the NJL model as an effective theory of QCD and analogies with condensed matter physics, we extract simple physical pictures of the chiral phase transition at finite temperature $T$ and/or chemical potential $\mu$ and…

High Energy Physics - Phenomenology · Physics 2011-04-15 Teiji Kunihiro

Transitions between different states of matter and their thermodynamic properties are described by the Equation of State (EoS). A universal representation of the EoS of Quantum Chromodynamics (QCD) for the wide range of phase diagram has…

High Energy Physics - Phenomenology · Physics 2023-08-22 Maria Stefaniak , Klaus Werner , Johannes Jahan , Hanna Zbroszczyk

A qualitative analysis of the chiral phase transition in QCD with two massless quarks and non-zero baryon density is performed. It is assumed that at zero baryonic density, $\rho=0$, the temperature phase transition is of the second order…

High Energy Physics - Phenomenology · Physics 2007-05-23 B. L. Ioffe

It is shown that the hadronic matter formed at high temperatures, according to the prescription of the statistical bootstrap principle, develops a critical point at nonzero baryon chemical potential, associated with the end point of a…

High Energy Physics - Phenomenology · Physics 2007-05-23 N. G. Antoniou , F. K. Diakonos , A. S. Kapoyannis

We study the QCD phase diagram on the plane of temperature T and quark chemical potential mu, modelling the strong interactions with the linear sigma model coupled to quarks. The phase transition line is found from the effective potential…

High Energy Physics - Phenomenology · Physics 2015-12-09 Alejandro Ayala , Adnan Bashir , J. J. Cobos-Martinez , Saul Hernandez-Ortiz , Alfredo Raya

The phase diagram of quantum chromodynamics (QCD) and its associated thermodynamic properties of quark gluon plasma (QGP) are studied in the presence of time dependent magnetic field. The study plays a pivotal role in the field of…

High Energy Physics - Phenomenology · Physics 2024-02-06 Yogesh Kumar , Poonam Jain , Pargin Bangotra , Vinod Kumar , D. V. Singh , S. K. Rajouria

We investigate the chemical potential and baryon number density of the hadron-quark phase transition in neutron star matter. The hadron matter is described with relativistic mean field theory, and the quark matter is described with the…

Nuclear Theory · Physics 2019-09-04 Zhan Bai , Yu-xin Liu
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