# Raymond Ehlers

Postdoctoral Associate
Oak Ridge National Lab
203-432-6259
Research Areas:
Experimental Nuclear Physics
Education:
Ph.D. Yale University, 2020
Jet-Hadron Correlations Measured in Pb--Pb Collisions at $\sqrt{s_{\text{NN}}} = 5.02$ TeV with ALICE
This thesis investigates potential path length dependence of jet quenching via the measurement of azimuthal jet-hadron correlations with respect to the event plane orientation in Pb–Pb collisions at $\sqrt{s_{\text{NN}}} = 5.02$ TeV with the ALICE detector. Such studies also help constrain the large background underlying this measurement. The associated hadron yields and correlation widths associated with the trigger and recoil jets are compared as a function of event plane orientation. They are found to be predominately consistent between the different orientations within uncertainties, although there are suggestions of deviations at low associated particle transverse momentum. Indeed, theoretical predictions suggest that any deviations are expected to be small, which may be due to competing processes associated with jet quenching. I also discuss my contributions to ALICE Overwatch, a project to enable nearly real-time data quality monitoring and assurance using the capabilities of the High Level Trigger.