Speaker
Description
The momentum-weighted sum of the charges inside a jet provides an experimental handle on the electric charge of fundamental strongly-interacting particles. Knowing the charge of the parton initiating a light-quark jet could be extremely useful both for testing aspects of the Standard Model and for characterizing potential beyond-the-Standard-Model signals not only in pp collisions, but also the medium effects in heavy-ion collisions. There is evidence for a p_T dependence of the jet charge distribution for a given jet flavor.
Within the jet product in pp collisions by pythia6, and parton energy loss in the frame work of PYQUEN model, we give our first prediction for the average value of the jet charge distribution for the leading jet in heavy-ion collision both at RHIC and LHC. It is shown that the jet charge is significant modified by the medium created during these reactions and an enhancement of jet change in A+A relative to p+p is observed due to jet quenching effect. Since obvious difference of jet charge can be found between quark and gluon jets, this could be useful to discriminate the energy loss pattern between quark and gluon. The averaged jet charge distribution may present distinct patterns when different models of the flavor dependence of parton energy are incorporated.
Summary
We give the first theoretical prediction for the medium modifications of averaged jet charge in heavy ion collisions, which could provide a very powerful tool to discriminate the energy loss pattern between quark and gluon.
| Presentation type | Oral |
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