Speaker
Description
Proton-ion collisions have been included in runs at the LHC and RHIC in addition to proton-proton and heavy ion collisions as a means of studying cold nuclear matter (CNM) effects. These asymmetric systems have yielded some unexpected trends, notably in measurements of nuclear modification factors at different centralities. Detectors at forward/backward rapidity have been used as a proxy for centrality or event activity (EA) in p+Au collisions in order to avoid auto-correlations in mid-rapidity measurements. In this poster, we show correlations of backward-rapidity (Au-going) event activity with mid-rapidity underlying event (UE) in p+Au collisions at $\sqrt{s_\mathrm{NN}}$ = 200 GeV measured with the STAR detector. We present UE measurements and show the trends of UE in relation to EA for high-transverse momentum ($p_{T}$) jet events vs. di-jet events. Additionally, we will study collision kinematics via observables including jet rapidity ($\eta$) and jet $p_{T}$ as a means of investigating the initial hard scattering of partons in these events.
| Contribution type | Poster |
|---|---|
| Track | Jets and High Momentum Hadrons |
| Collaboration (if applicable) | STAR |
