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We investigate the nonequilibrium evolution of the sigma field coupled to a fluid dynamic expansion of a hot fireball to model the chiral phase transition in heavy-ion collisions. The dissipative processes and fluctuations are allowed under…

Nuclear Theory · Physics 2011-10-24 Marlene Nahrgang , Christoph Herold , Stefan Leupold , Igor Mishustin , Marcus Bleicher

The environment generated in the mid-rapidity region of a high-energy nuclear collision endows the pionic degrees of freedom with a time-dependent effective mass. Its specific evolution provides a mechanism for the production of…

Nuclear Theory · Physics 2014-11-18 Jorgen Randrup

We consider the chiral phase transition relevant for QCD matter at finite temperature but with vanishing baryon density. Presumably, the chiral phase transition is of second order for two-flavor QCD in the chiral limit. Near the transition…

High Energy Physics - Theory · Physics 2025-07-30 Yanyan Bu , Zexin Yang

We introduce an effective quark-meson-nucleon model for the QCD phase transitions at finite baryon density. The nucleon and the quark degrees of freedom are described within a unified framework of a chiral linear sigma model. The…

High Energy Physics - Phenomenology · Physics 2015-06-30 Sanjin Benic , Igor Mishustin , Chihiro Sasaki

We develop a dynamical model to describe critical fluctuations in heavy-ion collisions, incorporating the baryon diffusion current and chiral condensate as dynamical degrees of freedom, to address their nontrivial scale separation. The…

Nuclear Theory · Physics 2025-02-26 Azumi Sakai , Koichi Murase , Hirotsugu Fujii , Tetsufumi Hirano

We investigate the evolution of the density-density correlations in the isoscalar critical condensate formed at the QCD critical point. The initial equilibrium state of the system is characterized by a fractal measure determining the…

High Energy Physics - Phenomenology · Physics 2008-11-26 N. G. Antoniou , F. K. Diakonos , E. N. Saridakis

We revisit the holographic description of the thermal first order phase transition of N=4 SYM compactified on a spatial circle. At the transition, the dominant bulk saddle exchanges between a geometry with a compact spatial circle and one…

High Energy Physics - Theory · Physics 2026-05-11 Martí Berenguer , Johanna Erdmenger , Nick Evans , Wanxiang Fan , Florian Vasel

Enhancement of omega and antiomega baryon production in Pb+Pb collisions at a c.m. energy of 17 A GeV can be explained by the formation of many small disoriented chiral condensate regions. This explanation implies that neutral and charged…

Nuclear Theory · Physics 2009-11-07 Sean Gavin , Joseph I. Kapusta

An increase in the size of coherent domains in the one component $\Phi^4$ field theory under the influence of a uniformly changing external magnetic field near the critical end-point $T_{\Phi}=T_c, h_{\Phi}=0$ was proposed recently as an…

High Energy Physics - Phenomenology · Physics 2009-11-07 Sz. Borsanyi , A. Patkos , D. Sexty , Zs. Szep

We study photoproduction during the non-equilibrium stages of the formation of chiral condensates within the ``quench'' scenario of the chiral phase transition. The dynamics is modeled with a gauged linear sigma model. A novel quantum…

High Energy Physics - Phenomenology · Physics 2011-04-15 D. Boyanovsky , H. J. de Vega , R. Holman , S. Prem Kumar

We report evidence for a continuous transition from an infrared conformal phase to a chirally broken one in four dimensions. We study a model with two Dirac fermions in the adjoint representation of an SU(2) gauge interaction and a chirally…

High Energy Physics - Phenomenology · Physics 2020-08-26 Jarno Rantaharju , Claudio Pica , Francesco Sannino

The statistical equilibrium properties of the linear sigma model are studied, with a view towards characterizing the field configurations employed as initial conditions for numerical simulations of the formation of disoriented chiral…

High Energy Physics - Phenomenology · Physics 2009-10-28 Jorgen Randrup

We study the scaling behavior of the (2+1)-flavor QCD crossover region towards the chiral limit with smaller-than-physical light quark mass gauge ensembles, generated using the HISQ fermion discretization. At zero chemical potential, we…

High Energy Physics - Lattice · Physics 2022-07-14 Olaf Kaczmarek , Frithjof Karsch , Anirban Lahiri , Sheng-Tai Li , Mugdha Sarkar , Christian Schmidt , Philipp Scior

In this paper, we present a holographic realization of spontaneous chiral symmetry breaking and confinement. The latter is realized by building a solution of 5d Einstein-dilaton gravity leading to a confining quark antiquark potential. The…

High Energy Physics - Phenomenology · Physics 2023-08-16 Alfonso Ballon-Bayona , Tobias Frederico , Luis A. H. Mamani , Wayne de Paula

In QCD with two flavors of massless quarks, the chiral phase transition is plausibly in the same universality class as the classical four component Heisenberg antiferromagnet. Therefore, renormalization group techniques developed in the…

High Energy Physics - Phenomenology · Physics 2009-10-22 K. Rajagopal , F. Wilczek

The signatures of the creation of a disoriented chiral condensate in heavy-ion collisions are studied in the Ginzburg-Landau description of chiral phase transition. Scaling properties are found that characterize the fluctuations of charged…

High Energy Physics - Phenomenology · Physics 2011-08-11 Rudolph C. Hwa , C. B. Yang

Disoriented chiral condensates are manifested as long wavelength pionic oscillations and their interaction with the thermal environment can be a significant source of dileptons. We calculate the yield of such dilepton production within the…

Nuclear Theory · Physics 2016-09-08 V. Koch , J. Randrup , X. N. Wang , Y. Kluger

An important component in studying mathematical models in many biochemical systems, such as those found in developmental biology, is phase transition. The purpose of this work is to analyze the phase transition property of a…

Analysis of PDEs · Mathematics 2013-12-19 Masoud Yari

Interaction-driven topological phase transitions in Dirac semimetals are investigated by means of large-scale quantum Monte Carlo (QMC) simulations. The interaction among Dirac fermions is introduced by coupling them to Ising spins that…

Strongly Correlated Electrons · Physics 2017-02-13 Xiao Yan Xu , K. S. D. Beach , Kai Sun , F. F. Assaad , Zi Yang Meng

A mixture of spinning particles of two different types represents a system where both nonreciprocity and chirality determine the emergent dynamics. In this work we present a minimal model for a two-species mixture of chiral active…

Statistical Mechanics · Physics 2025-10-27 Giulia Pisegna , Suropriya Saha