Speaker
Description
One of the primary biases in event classification for small-system ($p/d+A$) collisions is thought to be depletion of the energy available for soft production by hard scatterings in high activity events. This may potentially mask any real suppression or enhancement in the nuclear modification factor $R_{p/d\,A}$. In this work, the X-SCAPE framework is used to simulate $d+Au$ collisions at top RHIC energy and compare with recent PHENIX data. In particular, we investigate the production of high-$p_T$ pions and direct photons with event activity and examine the QGP final-state effects on $R^{\pi^0}_{dA}$ [1]. We extend our existing hard-soft framework [2] to allow for multiple hard scatterings, while enforcing exact energy-momentum conservation between the soft and hard sectors. Hard photons are produced in the initial state, in hard scattering, and in final state radiation. We present results both with and without the inclusion of final state energy loss. This work presents the first simulation of a $p/d+A$ collision with correlated soft and hard production mechanisms, multiple hard binary collisions, and exact energy-momentum conservation.
[1] N. J. Abdulameer et al. (PHENIX), Phys. Rev. Lett. 134, 022302 (2025).
[2] I. Soudi et al. (JETSCAPE), Phys. Rev. C 112, 014905 (2025).
| Is this an experimental talk? | No |
|---|---|
| Is this on behalf of a collaboration? | Yes |
| Which collaboration? | JETSCAPE |
| Are you willing to present as a poster if it is not selected for oral presentation? | Yes |