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On the momentum broadening of in-medium jet evolution using a light-front Hamiltonian approach
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abstract
Following the non-perturbative light-front Hamiltonian formalism developed in our preceding work [Phys.Rev.D 104 (2021) 5, 056014], we investigate the momentum broadening of a quark jet inside a SU(3) colored medium. We perform the numerical simulation of the real-time jet evolution in Fock spaces of a single quark, a quark-gluon state, and coupled quark- and quark-gluon states at various jet momenta $p^+$ and medium densities. With the obtained jet light-front wavefunction, we extract the jet transverse momentum distribution, the quenching parameter, and the gluon emission rate. We analyze the dependence of momentum broadening on $p^+$, medium density, color configuration, spatial correlation, and medium-induced gluon emission. For comparison, we also derive analytically the expectation value of the transverse momentum of a quark-gluon state in any color configuration and in an arbitrary spatial distribution in the eikonal limit. This work can help understand jet momentum broadening in the non-eikonal regime.
Forward citations
Cited by 4 Pith papers
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A quantum-circuit framework maps partonic cross-sections for multi-particle QCD processes in media, benchmarked on dipole formation and antenna radiation at leading order.
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Momentum Broadening in the Opacity Expansion: All-Path-Length Corrections and Improved Regge Kinematics
Combined short-path-length (APL) and sub-eikonal corrections to GLV momentum broadening nearly cancel, restoring the standard GLV result; the paper argues this may resolve the earlier large negative APL energy-loss co...
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Efficient Quantum Simulation of QCD Jets on the Light Front
A direct second-quantized qubit encoding of the light-front QCD Hamiltonian is used to classically emulate in-medium jet evolution with up to three-particle Fock states.
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Quantum Computation for Jets in Heavy Ion Collisions
This is a talk summary reviewing quantum algorithms for light-front simulation of jets, with no new technical result.
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