Gradient Tomography of Jet Quenching in Heavy-ion Collisions

Jun 4, 2020, 12:30 PM

Oral Presentation Jets and High Momentum Hadrons Parallel


Prof. Xin-Nian Wang (CCNU/LBNL)


Transverse momentum broadening and energy loss of a propagating parton are dictated by the space-time profile of the jet transport coefficient $\hat q$ in dense QCD medium. Spatial gradient of $\hat q$ perpendicular to the propagation direction can lead to a drift and asymmetry in parton transverse momentum distribution. Such an asymmetry depends on both the spatial position along the transverse gradient and path length of a propagating parton as shown by numerical solutions of the Boltzmann transport in the simplified form of a drift-diffusion equation. In high-energy heavy-ion collisions, this asymmetry with respect to a plane defined by the beam and trigger particle (photon, hadron or jet) with a given orientation relative to the event plane is shown to be closely related to the transverse position of the initial jet production in full event-by-event simulations within the linear Boltzmann transport model. Such a gradient tomography can be used to localize the initial jet production position for more detailed study of jet quenching and properties of the quark-gluon plasma along a given propagation path in heavy-ion collisions.

Track Jets and High Momentum Hadrons
Contribution type Contributed Talk

Primary author

Prof. Xin-Nian Wang (CCNU/LBNL)

Presentation materials