Related Experiment Video
Updated: Apr 30, 2026
08:34
Cryogenic Liquid Jets for High Repetition Rate Discovery Science
Published on: May 9, 2020
3.8K
Lattice study of the jet quenching parameter
Marco Panero1, Kari Rummukainen2, Andreas Schäfer3
1Instituto de Física Téorica UAM/CSIC, Universidad Autónoma de Madrid, E-28049 Madrid, Spain and Department of Physics and Helsinki Institute of Physics, University of Helsinki, P.O. Box 64, FI-00014, Finland.
Physical Review Letters
|May 13, 2014
Summary
We computed the jet quenching parameter, crucial for understanding high-energy particle interactions in hot Quantum Chromodynamics (QCD) matter. Our results show significant soft contributions, impacting heavy-ion collider physics.
Area of Science:
- Nuclear Physics
- High-Energy Physics
- Quantum Chromodynamics (QCD)
Background:
- The jet quenching parameter quantifies momentum broadening of high-energy partons in deconfined QCD matter.
- Understanding this phenomenon is vital for interpreting heavy-ion collision experiments.
Purpose of the Study:
- To perform a first-principle computation of the jet quenching parameter.
- To evaluate the soft contribution to the collision kernel characterizing this real-time process.
Main Methods:
- Utilized a dimensionally reduced effective theory (electrostatic QCD).
- Employed nonperturbative simulations on a Euclidean lattice.
- Analyzed specific gauge-invariant operators following Caron-Huot's approach.
Main Results:
- High-precision numerical computations reveal large soft contributions to the jet quenching parameter.
- Quantitative estimates were derived for temperatures relevant to heavy-ion colliders.
Conclusions:
- Soft contributions play a significant role in jet quenching.
- The findings are compared with phenomenological models and holographic computations.
Related Concept Videos
02:54Trends in Lattice Energy: Ion Size and Charge
23.4K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.4K
01:14Free Jet
747
Free jets describe the flow of liquid exiting a reservoir through an opening into the atmosphere without resistance. The velocity (v) of the liquid jet is derived using Bernoulli's principle and expressed as:
747
01:07Laminar and Turbulent Flow
9.7K
Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the...
9.7K
01:22Couette Flow
1.4K
Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
1.4K
01:17Steady, Laminar Flow Between Parallel Plates
1.1K
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
1.1K
01:10Poiseuille's Law and Reynolds Number
8.2K
Any fluid in a horizontal tube can flow due to pressure differences—fluid flows from high to low pressure. The flow rate (Q) is the ratio of pressure difference and resistance through a horizontal tube. The greater the pressure difference, the higher the flow rate. The flow resistance is expressed as:
8.2K