Apr 23 – 27, 2023
JMS Aster Plaza
Asia/Tokyo timezone

The gradient tomography of dijet production in heavy-ion collisions

Apr 24, 2023, 4:15 PM
Multi-Purpose Studio, 2nd Floor (JMS Aster Plaza)

Multi-Purpose Studio, 2nd Floor

JMS Aster Plaza

Oral Jets and medium response Parallel Session C


Dr Yayun He (South China Normal University)


Abstract: Jet energy loss and transverse momentum broadening can be implicitly represented by jet transport coefficient $\hat{q}$ distributed in the whole phase space of the QGP medium. The gradient of $\hat{q}$ perpendicular to the momentum direction of an energetic parton leads to an asymmetry of the transverse momentum distribution, which can be used for the initial jet production localization. We study such an asymmetry caused by the subleading jet by triggering the leading jet propagating in-plane. Simulations are performed in the linear Boltzmann transport model with event-by-event 3+1D viscous hydrodynamic backgrounds. We find that the initial jet production vertex can be localized by combining the dijet transverse imbalance $x_{J} = p^\mathrm{subleading}_{T} / p^\mathrm{leading}_{T}$ and subleading jet transverse gradient asymmetry for different leading jet $p_{T}$ regions. The correlation between both quantities is also investigated to illustrate the properties of $\hat{q}$.

Theory / experiment Theory

Primary authors

Dr Yayun He (South China Normal University) Dr Xin-Nian Wang (Lawrence Berkeley National Lab. (US))

Presentation materials