Abstract
The pseudorapidity distribution of charged hadrons produced in Au+Au collisions at a center-of-mass energy of sNN = 200 GeV is measured using data collected by the sPHENIX detector. Charged hadron yields are extracted by counting cluster pairs in the inner and outer layers of the Intermediate Silicon Tracker, with corrections applied for detector acceptance, reconstruction efficiency, combinatorial pairs, and contributions from secondary decays. The measured distributions cover |η| < 1.1 across various centralities, and the average pseudorapidity density of charged hadrons at mid-rapidity is compared to predictions from Monte Carlo heavy-ion event generators. This result, featuring full azimuthal coverage at mid-rapidity, is consistent with previous experimental measurements at the Relativistic Heavy Ion Collider, thereby supporting the broader sPHENIX physics program.
| Original language | English |
|---|---|
| Article number | 75 |
| Journal | Journal of High Energy Physics |
| Volume | 2025 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2025 |
Funding
We thank the Collider-Accelerator Division, SDCC and Physics Departments at Brookhaven National Laboratory and the staff of the other sPHENIX participating institutions for their vital contributions. We acknowledge support from the Office of Nuclear Physics and Graduate Student Research (SCGSR) program in the Office of Science of the U.S. Department of Energy, the U.S. National Science Foundation, the National Science and Technology Council, the Ministry of Education of Taiwan, and the Ministry of Economic Affairs (Taiwan), the Ministry of Education, Culture, Sports, Science, and Technology and the Japan Society for the Promotion of Science (Japan), Basic Science Research Programs through NRF funded by the Ministry of Education and the Ministry of Science and ICT (Korea) and the Swedish Research Council, VR (Sweden).
Keywords
- Heavy Ion Experiments
- Heavy-Ion Collision
- Quark Gluon Plasma