Speaker
Description
In this talk we will report measurements of identified charged hadron production within reconstructed jets in proton-proton (p+p), proton-aluminum (p+Al), and proton-gold (p+Au) collisions at $\sqrt{s_{NN}}$ = 200 GeV recorded by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). Charged hadrons are reconstructed with the Time Projection Chamber (TPC) and Time-of-Flight (TOF) detectors and identified as pions, kaons, or protons via combined ionization energy loss and timing information. Jets are reconstructed using the anti-$k_T$ algorithm with well-defined acceptance and quality cuts. Identified hadron yields inside jets are studied as functions of the momentum fraction $z$ and the transverse momentum $j_T$ relative to the jet direction. Per-jet hadron yields are normalized and measured for each collision system using a consistent jet and track selection, thereby reducing sensitivity to luminosity and efficiency effects. Ratios of the per-jet yields in p+A to those in p+p collisions will be used to quantify possible nuclear modifications of jet fragmentation functions, providing insight into parton energy loss and hadronization in cold nuclear matter, and offering new experimental constraints on parton fragmentations in small systems at RHIC energies.
| Speaker confirmation | Yes |
|---|