Article
Physics, Particles & Fields
Masaru Hongo, Xu-Guang Huang, Matthias Kaminski, Mikhail Stephanov, Ho-Ung Yee
Summary: We calculate the relaxation rate of the spin density of heavy quarks in a perturbative QCD plasma and demonstrate the differences between three different methods of calculation, while finding that the relaxation rate of the spin is smaller than that of other non-hydrodynamic modes in the heavy-quark limit.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
M. Laine
Summary: The study of the diffusion and kinetic equilibration of heavy quarks within a hot QCD medium benefits from understanding the coloured Lorentz force acting on them. By determining 1-loop matching coefficients for the electric and magnetic parts of a Lorentz force, it enables a lattice study of a color-magnetic 2-point correlator.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Nuclear
Sigtryggur Hauksson, Sangyong Jeon, Charles Gale
Summary: The sensitivity of penetrating probes in heavy-ion collisions to the transport coefficients of quark-gluon plasma requires a detailed understanding of photon emission and jet-medium interaction in a nonequilibrium plasma. Accounting for the time evolution of an unstable plasma can cure spurious divergences when evaluating the rate of interaction of hard probes with the plasma. The exponential growth of gluon occupation density in an unstable plasma may suggest a phenomenological prescription where instability poles are subtracted. Additionally, instability fields do not seem to affect medium-induced photon emission in the Abelian case to the examined approximation level.
Article
Physics, Particles & Fields
Xiaojun Yao, Thomas Mehen
Summary: This study investigates quarkonium transport in a quark-gluon plasma, deriving a semiclassical Boltzmann equation and discussing the centrality and momentum dependence of the reaction rates. The research also explores ways to indirectly constrain the quarkonium in-medium real potential and quantum corrections to the semiclassical transport equation, which can be applied to understand quarkonium transport in cold nuclear matter.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Xiaojian Du, Ralf Rapp
Summary: This paper investigates the quarkonium regeneration in ultrarelativistic heavy-ion collisions and proposes a semi-classical charmonium transport approach. The study finds that a good description of the measured J/psi yield and its transverse-momentum dependence can be achieved if a large K >= 5 is employed.
Article
Astronomy & Astrophysics
Daniel Avila, Francisco Nettel, Leonardo Patino
Summary: We expand our holographic analysis to study the emission of photons in a strongly coupled plasma under a very intense external magnetic field. By relaxing certain constraints, we demonstrate that photons can have either out-plane or in-plane polarization. Our calculations and numerical results complement our previous findings, showing that the introduction of a nonvanishing magnetic field can increase photon production up to a certain intensity, beyond which the effect is reversed. This magnetic field also increases the elliptic flow, providing a possible explanation for excess measured in collision experiments.
Article
Astronomy & Astrophysics
Alex Buchel
Summary: In this study, we use N = 2* and cascading gauge theory holographic models to investigate the gravitational susceptibility of strongly coupled nonconformal quark-gluon plasma. We find that in theories with a relevant coupling constant, the gravitational susceptibility depends on the renormalization scheme. To overcome this issue, we propose using the temperature derivative of the susceptibility, d kappa/dlnT, as a scheme-independent characteristic of quark-gluon plasma. Furthermore, we show that the critical behavior of kappa can vary significantly near seemingly identical thermal phase transitions.
Article
Physics, Particles & Fields
Jacopo Ghiglieri, Eamonn Weitz
Summary: This article discusses corrections to the transverse momentum broadening coefficient, including soft, classical and radiative, quantum corrections. The study finds that a thermal population of dynamical gluons changes the boundaries and reduces the size of the double-logarithmic phase space, and provides new subdominant logarithmic corrections. It also shows the smooth connection between the quantum, double-logarithmic and classical, soft phase spaces.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Tomoya Hayata, Yoshimasa Hidaka, Kazuya Mameda
Summary: In this study, we derived the chiral kinetic theory under the presence of gravitational Riemann curvature and discovered new types of fermionic transport phenomena, including charge current and energy-momentum tensor induced by the curvature. It was found that inhomogeneous fluid vorticity can induce charge and energy currents in opposite directions, due to the spin-curvature coupling. Additionally, possible applications to Weyl/Dirac semimetals and heavy-ion collision experiments were briefly discussed.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
K. Boguslavski, T. Lappi, M. Mace, S. Schlichting
Summary: We have developed a non-perturbative method to obtain fermion spectral functions in a non-Abelian gauge theory with high occupation numbers. By applying this method, we extracted the spectral function of fermions in a highly occupied non-Abelian plasma near its non-thermal fixed point. The results show good agreement with hard loop perturbation theory and provide insights into the momentum dependence of the damping rate of collective excitations.
Article
Astronomy & Astrophysics
Christopher Grayson, Martin Formanek, Johann Rafelski, Berndt Mueller
Summary: In this study, we investigate the electromagnetic response of a viscous quark-gluon plasma using the relativistic Boltzmann equation. By considering the linear response of the electromagnetic field and the complete spatial and temporal dependence of the perturbing fields, we derive an analytic expression for the magnetic field between two colliding nuclei.
Article
Physics, Multidisciplinary
Constantia Alexandrou, Simone Bacchio, Georg Bergner, Jacob Finkenrath, Andrew Gasbarro, Kyriakos Hadjiyiannakou, Karl Jansen, Bartosz Kostrzewa, Konstantin Ottnad, Marcus Petschlies, Ferenc Pittler, Fernanda Steffens, Carsten Urbach, Urs Wenger
Summary: This study presents the first full decomposition of the pion momentum into its gluon and quark contributions. The results show that the sum of separate contributions satisfies the momentum sum rule.
PHYSICAL REVIEW LETTERS
(2021)
Review
Physics, Nuclear
Alexei Bazavov, Johannes Heinrich Weber
Summary: This article reviews lattice studies of color screening in the quark-gluon plasma, discussing the onset and significance of color screening in the QCD transition region. It clarifies to what extent the weak-coupling picture captures key properties of color screening at different temperatures. The study also delves into different regimes pertaining to color screening and thermal dissociation of static quarks for various spatial correlation functions studied on the lattice.
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS
(2021)
Article
Astronomy & Astrophysics
Baoyi Chen, Liuyuan Wen, Yunpeng Liu
Summary: In this study, we investigated the production of B-c(+) in Pb-Pb collisions at root s(NN)=5.02TeV. We found that the non-equilibrium distribution of heavy quarks in the quark-gluon plasma and the enhanced coalescence probability of charm and bottom quarks led to an increased production of B+c, resulting in a nuclear modification factor (R-AA) of B-c(+) greater than unity.
Article
Multidisciplinary Sciences
Andrey Yu Kotov, Maria Paola Lombardo, Anton Trunin
Summary: The study focuses on the hot QCD transition with varying number of flavours, exploring different universality classes and the transition from scaling window to mean field behavior. It summarizes the properties of the transition process, including first order transitions, cosmological applications, and the essential singularity at the onset of the conformal window predicted by the functional renormalisation group.
Review
Physics, Multidisciplinary
Jacopo Ghiglieri, Aleksi Kurkela, Michael Strickland, Aleksi Vuorinen
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2020)
Article
Physics, Particles & Fields
Jacopo Ghiglieri, Guy D. Moore, Philipp Schicho, Niels Schlusser
Summary: Studied the propagation and transport properties of high-energy particles in a medium, as well as the corresponding effective theory EQCD. The results show remarkable agreement between EQCD and lattice simulations in the expected regime.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Guy D. Moore, Soeren Schlichting, Niels Schlusser, Ismail Soudi
Summary: We provide results obtained from lattice EQCD with the correct UV limit to construct the collisional broadening kernel C(b(perpendicular to)) in a QCD plasma. We discuss the limiting behavior of C(b(perpendicular to)) at small and large impact parameters b(perpendicular to), and demonstrate how these results can be utilized to calculate medium-induced radiation rates.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Jacopo Ghiglieri, Eamonn Weitz
Summary: This article discusses corrections to the transverse momentum broadening coefficient, including soft, classical and radiative, quantum corrections. The study finds that a thermal population of dynamical gluons changes the boundaries and reduces the size of the double-logarithmic phase space, and provides new subdominant logarithmic corrections. It also shows the smooth connection between the quantum, double-logarithmic and classical, soft phase spaces.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Simon Caron-Huot, Guy D. Moore
Summary: We demonstrate that in relativistic field theories, the thermal correlation function of N bosonic operators exhibits exponentially weak dependence on the time variables when the space separations are held constant. Moreover, in classical thermal field theory, the time dependence disappears when all points are spacelike separated.
Article
Astronomy & Astrophysics
Luis Altenkort, Alexander M. Eller, O. Kaczmarek, Lukas Mazur, Guy D. Moore, Hai-Tao Shu
Summary: The proposed method significantly improves the signal-to-noise ratio of lattice correlation functions for bosonic operators by breaking each plane into bins and computing bin-bin correlations. Experimental results show noise reductions of around 3-7 times compared to the conventional approach on the same ensemble of configurations.
Article
Astronomy & Astrophysics
Yu Fu, Jacopo Ghiglieri, Shahin Iqbal, Aleksi Kurkela
Summary: We provide the first NLO weak-coupling description of the thermalization process in non-Abelian gauge theory and study the time evolution of isotropic systems towards thermal equilibrium. Numerical solutions of the QCD effective kinetic theory show that the NLO corrections reduce the time needed to reach thermal equilibrium.
Article
Astronomy & Astrophysics
P. Thomas Jahn, Parikshit M. Junnarkar, Guy D. Moore, Daniel Robaina
Summary: A reweighting technique was introduced to allow for continuous temperature sampling in a single simulation, which was used to compute the temperature dependence of QCD topological susceptibility at high temperatures. The method determines the ratio of chi(t)(op) between any two temperatures within the explored range and is competitive with existing methods. This method may also be useful for exploring the temperature dependence of other thermodynamical observables in QCD.
Article
Astronomy & Astrophysics
Luis Altenkort, Alexander M. Eller, O. Kaczmarek, Lukas Mazur, Guy D. Moore, H-T Shu
Summary: The article demonstrates how to determine the sphaleron rate by analytically continuing the two-point function of the Euclidean topological charge density, using gradient flow to reduce noise and improve topology measurement accuracy. Correlators were measured on large, fine lattices at 1.5T(c) with high precision, followed by continuum extrapolation to zero flow time to study the sphaleron rate using spectral reconstruction based on perturbatively motivated models.
Article
Astronomy & Astrophysics
Luis Altenkort, Alexander M. Eller, O. Kaczmarek, Lukas Mazur, Guy D. Moore, H-T Shu
Summary: The study applies gradient flow to investigate the color-electric two-point function and heavy quark momentum diffusion coefficient. Results show that estimates at fixed and zero flow time are largely consistent, indicating that this method provides high-precision data and is applicable to various actions.
Article
Astronomy & Astrophysics
Guy D. Moore, Niels Schlusser
Correction
Astronomy & Astrophysics
Alexander M. Eller, Jacopo Ghiglieri, Guy D. Moore
Article
Astronomy & Astrophysics
Guy D. Moore, Niels Schlusser
Article
Astronomy & Astrophysics
Alexander M. Eller, Jacopo Ghiglieri, Guy D. Moore
