A5060349594- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Solar and Space Plasma Dynamics
- Black Holes and Theoretical Physics
- Geophysics and Gravity Measurements
- Advanced Topology and Set Theory
- Constraint Satisfaction and Optimization
- Advanced Differential Geometry Research
Lund University
2019-2024
Motivated by recent interest in collectivity small systems, we calculate the harmonic flow response to initial geometry deformations within weakly coupled QCD kinetic theory using first correction free-streaming background. We derive a parametric scaling formula that relates systems of different sizes and generic gluon distributions. comment on similarities differences between full effective toy models used previously. Finally centrality dependence integrated elliptic $v_2$ oxygen-oxygen,...
Abstract We introduce the parton cascade Alpaca , which evolves ensembles corresponding to single events according effective kinetic theory of QCD at high temperature formulated by Arnold, Moore and Yaffe explicitly simulating elastic scattering, splitting merging. By taking ensemble average over many phase space density (as evolved Boltzmann equation) is recovered, but can go beyond evolution mean because it be turned into a complete event generator that produces fully exclusive final...
First-order perturbations of homogeneous and hypersurface orthogonal locally rotationally symmetric class II cosmologies with a cosmological constant are considered in the framework $1+1+2$ covariant decomposition spacetime. The perturbations, which perfect fluid type, include general scalar, vector, tensor modes extend some previous works vorticity were excluded. A harmonic is performed, field equations then reduced to set eight evolution for coefficients, representing density, shear,...
Understanding how momentum anisotropies arise in small collision systems is important for a quantitative understanding of collectivity terms QCD dynamics and large systems. In this letter we present results from the newly developed parton cascade Alpaca, which faithfully encodes AMY effective kinetic theory. Alpaca reproduces quantitatively previously known calculation single-hit approximation values coupling. We discuss detail such comparison to be carried out. Particularly at larger...
In collisions between heavy nuclei, such as those at the Large Hadron Collider (LHC) CERN, hydrodynamic models have successfully related measured azimuthal momentum anisotropies to transverse shape of collision region. For an elliptically shaped interaction area, pressure gradient is greater along minor axis, resulting in increased particle that direction - a phenomenon known positive elliptic flow. this paper, we demonstrate smaller systems, proton-proton and peripheral ion-ion collisions,...
We look at thermalization and isotropization processes in the newly introduced AMY QCD kinetic theory parton cascade ALPACA. For thermalization, we consider case of overoccupied initial conditions, study time evolution distribution as it relaxes to thermal equilibrium. find that system thermalizes expected compared known analytical results. anisotropic systems, take a first qualitative behaviour for Color Glass Condensate-like conditions homogeneous box with periodic boundary conditions.
Understanding how momentum anisotropies arise in small collision systems is important for a quantitative understanding of collectivity terms QCD dynamics and large systems. In this letter we present results from the newly developed parton cascade \textsc{Alpaca}, which faithfully encodes AMY effective kinetic theory. \textsc{Alpaca} reproduces quantitatively previously know calculation single-hit approximation values coupling. We discuss detail such comparison to be carried out. Particularly...
We introduce ALPACA, a Lorentz invariant parton cascade encoding the AMY effective kinetic theory of QCD at high temperatures. It solves Boltzmann equation by explicitly simulating evolution ensembles corresponding to single events. discuss how masses and temperature entering elastic collision splitting/merging rates can be estimated from just event. perform an extensive validation framework showing that it reproduces expected behaviour in thermal equilibrium.