Speaker
Description
Dijet production in high-energy heavy-ion collisions provides a calibrated probe of jet energy loss in the quark-gluon plasma: the dijet momentum imbalance $\Delta p_T = p_{T,\mathrm{PP}} - p_{T,\mathrm{AA}}$ directly reflects the differential energy loss between the leading and subleading jets. We investigate dijet $\Delta p_T$ and its dependence on the dijet momentum fraction $x_J = p_{T,\mathrm{sub}}/p_{T,\mathrm{lead}}$ using the Linear Boltzmann Transport(LBT) model and \textsc{PYTHIA}8 for Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV in the 0--10% centrality class.
We find that the leading jet $\Delta p_T$ is nearly independent of the PP dijet momentum fraction $x_{J,\mathrm{PP}}$,while the subleading jet $\Delta p_T$ decreases monotonically with decreasing $x_{J,\mathrm{PP}}$. This asymmetry reveals that the leading jet energy loss is governed primarily by the initial jet energy scale, whereas the subleading jet suffers additional suppression at small $x_J$ due to its larger in-medium path length relative to its energy.Both leading and subleading $\Delta p_T$ decrease with increasing jet radius $R$, consistent with the expected softening of in-medium jet energy loss at larger angular scales.
| 请选择分会 | 高能重离子物理 |
|---|
