Orateur
Description
sPHENIX, the first detector to be built at the Relativistic Heavy-Ion Collider (RHIC) in over two decades, will bring unprecedented measurement capabilities at RHIC energies. One of the initial physics measurements performed by sPHENIX is that of the total charged-particle multiplicity, which utilizes two-point tracklets constructed from clusters in the Intermediate Silicon Tracker (INTT), and is presented for the first time in this talk. This measurement serves to directly validate, based on real collision data, the operational readiness of the INTT readout and clustering methods, as well as the supporting detectors used for event characterization in sPHENIX. Additionally, this measurement provides a key diagnostic tool for acceptance, alignment, and vertex finding, which are critical components of the full tracking system that will enable the entire physics program of sPHENIX. The measurement of charged-particle multiplicity will be presented and discussed in the context of previous measurements at RHIC energies and the latest models of bulk particle production in heavy-ion collisions.
