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QCD at finite density presents specific challenges to lattice gauge theory. Nonetheless, a region of the QCD phase diagram up to moderately large baryon chemical potentials has been successfully explored on the lattice and new results and…

高能物理 - 格点 · 物理学 2008-11-26 M. -P. Lombardo

The phase diagram of QCD, as a function of temperature T and quark chemical potential mu, may contain a critical point (mu_E,T_E) whose non-perturbative nature makes it a natural object of lattice studies. However, the sign problem prevents…

高能物理 - 格点 · 物理学 2009-11-13 Ph. de Forcrand

We study time-dependent perturbations to a family of five-dimensional black hole spacetimes constructed as a holographic model of the QCD phase diagram. We use the results to calculate two transport coefficients, the bulk viscosity and…

高能物理 - 理论 · 物理学 2013-05-29 Oliver DeWolfe , Steven S. Gubser , Christopher Rosen

We study phase structure and critical point of finite-temperature QCD in the heavy-quark region applying the hopping parameter expansion (HPE). We first study finite-size scaling on the critical point on $N_t=4$ lattices with large spatial…

高能物理 - 格点 · 物理学 2022-11-17 Kazuyuki Kanaya , Ryo Ashikawa , Shinji Ejiri , Masakiyo Kitazawa , Hiroshi Suzuki , Naoki Wakabayashi

High moments of conserved quantities such as net-baryon, net-electric charge, and net-strangeness in heavy-ion collisions are sensitive to fluctuations caused by the QCD critical point (CP). The event-by-event analysis of high moments of…

核实验 · 物理学 2025-11-06 Xin Zhang , Yu Zhang , Xiaofeng Luo , Nu Xu

We show that the Linear Sigma Model with quarks produces an effective description of the QCD phase diagram and of the system's equilibrium distribution properties that deviate from those of the Hadron Resonance Gas Model. The deviation is…

We numerically construct static localized black holes in five and six spacetime dimensions which are solutions to Einstein's vacuum field equations with one compact periodic dimension. In particular, we investigate the critical regime in…

广义相对论与量子宇宙学 · 物理学 2017-09-20 Michael Kalisch , Sebastian Moeckel , Martin Ammon

Lattice QCD simulations have shown unequivocally that the transition from hadrons to quarks and gluons is a crossover when the baryon chemical potential is zero or small. Many model calculations predict the existence of a critical point at…

核理论 · 物理学 2022-08-17 J. I. Kapusta , C. Plumberg , T. Welle

We calculate the first four moments of baryon number, electric charge and strangeness fluctuations within the hadron resonance gas model. Different moments and their ratios as well as skewness and kurtosis are evaluated on the…

高能物理 - 唯象学 · 物理学 2011-06-27 Frithjof Karsch , Krzysztof Redlich

In the quest to unravel the mysteries of the strong force and the underlying properties of the quark-gluon plasma, the ALICE collaboration at CERN has carried out a comprehensive study focusing on the correlations between net-conserved…

核实验 · 物理学 2025-02-10 Swati Saha

We study the higher moments of the baryon number in the immediate neighbourhood of the QCD critical endpoint within the framework of Ising-QCD thermodynamics (N.~G. Antoniou {\it et al}, arXiv:1705.09124 [hep-ph]). We show that the…

Using recent results on higher order cumulants of conserved charge fluctuations from lattice QCD, we construct mean, variance, skewness, kurtosis, hyper-skewness and hyper-kurtosis of net-baryon number distributions for small baryon…

高能物理 - 格点 · 物理学 2021-02-03 Dennis Bollweg , Frithjof Karsch , Swagato Mukherjee , Christian Schmidt

A critical point in the phase diagram of Quantum Chromodynamics (QCD), if established either theoretically or experimentally, would be as profound a discovery as the good-old gas-liquid critical point. Unlike the latter, however,…

高能物理 - 唯象学 · 物理学 2023-07-19 Rajiv V. Gavai

The holographic Einstein-Maxwell-dilaton model is employed to map state-of-the-art lattice QCD thermodynamics data from the temperature ($T$) axis towards the baryon-chemical potential ($\mu_B$) axis aimed at gaining a warm equation of…

高能物理 - 理论 · 物理学 2024-07-03 Rico Zöllner , Burkhard Kämpfer

We propose a method to find the QCD critical point at finite density calculating the canonical partition function ${\cal Z}_{\rm C} (T,N)$ by Monte-Carlo simulations of lattice QCD, and analyze data obtained by a simulation with two-flavor…

高能物理 - 格点 · 物理学 2009-11-18 Shinji Ejiri

We have performed high-statistics lattice simulations using 4HEX improved staggered fermions on $16^3 \times 8$ lattices. We calculated the Taylor expansion coefficients of the pressure with respect to the baryochemical potential to the…

We discuss the potential of the experimental programme at NICA to investigate the QCD phase diagram and particularly the position of the critical line at large baryon-chemical potential with accurate measurements of particle multiplicities.…

核理论 · 物理学 2016-09-21 F. Becattini , R. Stock

The QCD critical point can be found in heavy ion collision experiments via the non-monotonic behavior of many fluctuation observables as a function of the collision energy. The event-by-event fluctuations of various particle multiplicities…

高能物理 - 唯象学 · 物理学 2014-11-21 Christiana Athanasiou , Krishna Rajagopal , Misha Stephanov

We consider quantum critical points (QCP) in which quantum fluctuations associated with charge rather than magnetic order induce unconventional metallic properties. Based on finite-T calculations on a two-dimensional extended Hubbard model…

强关联电子 · 物理学 2015-05-18 Laura Cano-Cortes , Jaime Merino , Simone Fratini

First principle study of QCD at finite temperature $T$ and chemical potential $\mu$ is essential for understanding a wide range of phenomena from heavy-ion collisions to cosmology and neutron stars. However, in the presence of finite…

高能物理 - 格点 · 物理学 2009-11-10 Xiang-Qian Luo