Quantum partonic transport in QCD matter

Barata, João; Sadofyev, Andrey V.; Wang, Xin‐Nian

doi:10.1103/physrevd.107.l051503

Cited by 14 publications

(3 citation statements)

References 47 publications

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“…with transverse momenta 𝑞 ⊥,𝑖 with 𝑖 = 𝑦 or 𝑧. It has been pointed out recently that pre-equilibrium dynamics may have sizable effects on heavy-quark diffusion and jet quenching [42,[47][48][49][50][51][52]. More specifically, the transport coefficients 𝜅 and q have been recently computed during the Glasma phase [41,42,48,50,[53][54][55] using force-force correlations or, alternatively, Wong's equations in classical-statistical simulations.…”

Section: Pos(hardprobes2023)008mentioning

confidence: 99%

Early time dynamics and constraints on medium evolution

Boguslavski

2024

Proceedings of 11th International Conference on Hard and Elecctromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardPr

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In relativistic heavy-ion collisions, a quark-gluon plasma (QGP) is created whose pre-equilibrium evolution includes a rich variety of exciting phenomena of Quantum Chromodynamics. In these Proceedings, we provide a short overview of our current understanding of the pre-equilibrium dynamics of the QGP from a weak-coupling perspective and highlight recent developments. Focusing on new studies, we then discuss how initial stages of the QGP medium may impact hard probes including direct photons, dileptons, jets, and heavy quarks. This introduces promising opportunities to obtain experimental signatures of the pre-equilibrium QGP.

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Section: Pos(hardprobes2023)008mentioning

confidence: 99%

Early time dynamics and constraints on medium evolution

Boguslavski

2024

Proceedings of 11th International Conference on Hard and Elecctromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardPr

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“…and transverse degrees of freedom are completely decoupled. The relaxation of the eikonal limit allows to compute corrections due to transverse flow and/or transverse density gradients which are proportional to inverse powers of the energy of the emitted gluon [20][21][22][23][24]. These sub-eikonal transverse corrections are expected to cause the jets to drift in the direction of the transverse flow or temperature gradient, resulting in an asymmetry in their transverse distribution [25,26].…”

Section: Carlota Andresmentioning

confidence: 99%

Jet medium modifications

Andres

2024

Proceedings of 11th International Conference on Hard and Elecctromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardPr

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Since the start of the heavy-ion collision programs at the Relativistic Heavy Ion Collider and the Large Hadron Collider, the study of jet modifications resulting from their interactions with the produced QCD matter has provided a unique tool to investigate and characterize the properties of the quark-gluon plasma. In this mini-overview, I will present the recent theoretical advancements in describing and understanding the modifications of jets within a QCD medium.

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“…The induced interactions modify the jet properties compared to the vacuum baseline, leading to a set of phenomena that are usually referred to as jet quenching [7,8], for reviews see [9][10][11][12][13][14]. Given that jets probe a wide range of scales of heavy-ion collisions, they can serve as probes of the initial pre-equilibrium dynamics [15,16] and anisotropy of the medium [17,18], as well as of the late hydrodynamic evolution [19]. There is a substantial experimental effort at RHIC and the LHC in quantifying the effects of jet quenching, focusing on a range of different observables [14,[20][21][22][23][24].…”

Section: Jhep09(2023)049 1 Introductionmentioning

confidence: 99%

Precise description of medium-induced emissions

Isaksen,

Tywoniuk

2023

J. High Energ. Phys.

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We study jet fragmentation via final-state parton splittings in the medium. These processes are usually calculated theoretically by invoking the large-Nc limit. In this paper we perform the first computation of a 1 → 2 parton splitting in a thermal medium at finite numbers of colors Nc, for arbitrary momentum-sharing fraction z and with full transverse dynamics. We show how the problem can be transformed into a system of coupled Schrödinger equations, that we solve numerically. The novel numerical results are used to estimate the accuracy of several widely used approximations. We check the error introduced while going from finite Nc (i.e. Nc = 3) to the large-Nc limit, which we find to be small. For unbalanced splittings, e.g. when z → 0, only one of the partons is affected by transverse momentum exchanges with the medium. The emission process then separates into a term responsible for the 1 → 2 splitting and the subsequent independent broadening of the daughter partons. This is also referred to as the factorizable term. For finite z, further contributions arise that are responsible for the coherent color dynamics of the two-parton system, and these are referred to as non-factorizable terms. These were argued to be small for soft (unbalanced) splittings and for large media. In this work we therefore determine the accuracy of keeping only the factorizable term of the large-Nc solution. We find that the error is insignificant at a small splitting fraction z ~ 0, but can be sizable in a more balanced splitting with z ~ 0.5. Finally, we also examine the eikonal approximation, which amounts to approximating the partons’ paths through the medium as straight lines. We find that it is associated with a substantial error for the parameter values we explored in this work.

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Quantum partonic transport in QCD matter

Cited by 14 publications

References 47 publications

Early time dynamics and constraints on medium evolution

Early time dynamics and constraints on medium evolution

Jet medium modifications

Precise description of medium-induced emissions

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