Quark Matter 2018

PHENIX Measurements of $dN_{ch}/d\eta$ in small systems (p$+$A, d$+$Au, and $^{3}$He$+$Au)

16 May 2018, 10:20

20m

Sala Volpi, 1st Floor (Palazzo del Casinò)

Parallel Talk Phase diagram and search for the critical point Phase diagram and search for the critical point

Speaker

Darren McGlinchey (Los Alamos National Laboratory)

Description

The PHENIX experiment has an excellent data set for small systems including p+Au, d+Au, 3He+Au at 200 GeV as well as the d+Au beam energy scan down to 19.6 GeV. We present new measurements of $dN_{ch}/d\eta$ for all of these systems over a broad range in pseudorapidity $-3 < \eta < +3$ and event multiplicity. These measurements provide key constraints of baryon stopping models and are compared with various theoretical calculations. The measurements are also compared with flow observables as a function of pseudorapidity to explore scaling relations. In particular measurements as a function of collision energy provide key inputs for calculations for the upcoming A+A beam energy scan at RHIC in terms of particle production and baryon rapidity shifts.

Presentation materials

McGlinchey_dndeta_qm2018.pdf