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In this study an effective description in the 2PI effective-action formalism for systems of quarks and mesons in and out of equilibrium within a numerical approach is developed, allowing to approximate the complexity of QCD by taking only…

High Energy Physics - Phenomenology · Physics 2021-07-05 Alex Meistrenko , Hendrik van Hees , Carsten Greiner

We discuss the properties of fluctuations of the electric charge in the vicinity of the chiral crossover transition within effective chiral models at finite temperature and vanishing net baryon density. The calculation includes…

High Energy Physics - Phenomenology · Physics 2015-05-30 V. Skokov , B. Friman , K. Redlich

We address the role of fluctuations in strongly interacting matter during the dense stages of a heavy-ion collision through its electromagnetic emission. Fluctuations of isospin charge are considered in a thermal system at rest as well as…

High Energy Physics - Phenomenology · Physics 2009-11-07 M. Prakash , R. Rapp , J. Wambach , I. Zahed

The effective theory based on combined chiral and heavy quark symmetry, the heavy meson chiral perturbation theory, is applied to studying the role of resonances in various processes of heavy mesons within and beyond the Standard Model.…

High Energy Physics - Phenomenology · Physics 2007-11-06 Jernej F. Kamenik

In a gaseous medium, dynamical friction (DF) reaches a maximum when the orbital speed of a (point-like) perturber moving on a circular orbit is close to the sound speed. Therefore, in a quasi-steady state, eccentric orbits of perturbers…

Astrophysics of Galaxies · Physics 2023-10-10 Robin Buehler , Roman Kolyada , Vincent Desjacques

We construct a theoretical framework to describe the evolution of heavy flavors produced in relativistic heavy-ion collisions. The in-medium energy loss of heavy quarks is described using our modified Langevin equation that incorporates…

Nuclear Theory · Physics 2015-08-19 Shanshan Cao , Guang-You Qin , Steffen A. Bass

Hard probe tomography of the quark-gluon plasma (QGP) in heavy ion collisions has long been a preeminent goal of the high-energy nuclear physics program. In service of this goal, the isotropic modification of jets and high-energy hadrons…

Nuclear Theory · Physics 2025-02-20 Joseph Bahder , Hasan Rahman , Matthew D. Sievert , Ivan Vitev

There exists a large field for phenomenological models in which the knowledge of the structure of hadrons in terms of QCD constituents obtained from deep inelastic scatterings is related to their behaviour in soft processes. One of the…

High Energy Physics - Phenomenology · Physics 2008-11-26 J. Nyiri

This is a brief review of our work describing the hadronization process of a QGP fireball formed in relativistic heavy-ion collisions. We introduce the SHARE method of analysis of hadron multiplicities. Using this tool we describe in…

High Energy Physics - Phenomenology · Physics 2022-12-29 Jan Rafelski , Michal Petran

Lattice QCD results reveal that the critical parameters and the order of the quark-hadron phase transition are quite sensitive to the number of dynamical flavours and their masses included in the theory. Motivated by this result we develop…

High Energy Physics - Phenomenology · Physics 2007-05-23 B. K. Patra , K. K. Singh , C. P. Singh

We investigate the time evolution of the quantum meson modes in the late time of chiral phase transition. In particular, it is shown that there exists a possible solution to the equation of motion for the quantum meson modes, which reveals…

Nuclear Theory · Physics 2010-12-14 K. Watanabe , Y. Tsue

A fireball of QGP is evoluted at temperature dependent chemical potential by a statistical model in the pionic medium. We study the dilepton emission rate at temperature dependent chemical potential (TDCP) from such a fireball of QGP. In…

High Energy Physics - Phenomenology · Physics 2012-08-08 S. Somorendro Singh , Yogesh Kumar

We calculate the dilepton emission rate from a fireball created in an ultra-relativistic heavy-ion collision. For the partonic phase, we complement the perturbative results by a phenomenological approach based on lattice QCD results,…

High Energy Physics - Phenomenology · Physics 2009-11-07 R. A. Schneider , T. Renk , W. Weise

Quark-hadron phase transition is simulated by an event generator that incorporates the dynamical properties of contraction due to QCD confinement forces and randomization due to the thermal behavior of a large quark system on the edge of…

Nuclear Theory · Physics 2017-04-05 Rudolph C. Hwa , C. B. Yang

In heavy-ion collisions, the harmonic flow $V_n$ of final-state particles are driven by the eccentricity vector ${\mathcal{E}}_n$ that describe the shape of the initial fireball projected in the transverse plane. It is realized recently…

Nuclear Theory · Physics 2020-07-01 Arabinda Behera , Maowu Nie , Jiangyong Jia

The emission of hard real photons from thermalized expanding hadronic matter is dominated by the initial high-temperature expansion phase. Therefore, a measurement of photon emission in ultrarelativistic heavy-ion collisions provides…

High Energy Physics - Phenomenology · Physics 2009-11-10 Thorsten Renk

We investigate the effects of explicit breaking of Z(3) symmetry due to the presence of dynamical quarks on the formation and evolution of Z(3) walls and associated QGP strings within Polyakov loop model. We carry out numerical simulations…

High Energy Physics - Phenomenology · Physics 2015-06-03 Uma Shankar Gupta , Ranjita K. Mohapatra , Ajit M. Srivastava , Vivek K. Tiwari

Heavy quarks serve as ideal probes of the QGP properties produced in energetic nuclear collisions, and provide a unique opportunity to study the mass effects on parton energy loss. We develop a multi-stage approach for heavy quark evolution…

Nuclear Theory · Physics 2019-02-07 Abhijit Majumder , Shanshan Cao , Chun Shen , Guang-You Qin

I review recent progress in developing a complete dynamical model for the evolution of the Little Bang fireballs created in relativistic heavy-ion collisions, and using the model to extract the transport properties and initial density…

Nuclear Theory · Physics 2015-06-15 Ulrich W. Heinz

We construct net baryon number and strangeness susceptibilities as well as correlations between electric charge and strangeness from experimental data of the ALICE Collaboration at the CERN LHC. The data were taken in Pb-Pb collisions at…

High Energy Physics - Phenomenology · Physics 2015-06-02 Peter Braun-Munzinger , Alexander Kalweit , Krzysztof Redlich , Johanna Stachel