2025/06/17 by Tulika Tripathy, Tripathy, Tulika
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle Detector Development and Performance #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2506.14989
openalex publication_date 2025/06/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The first measurements of the charged-particle pseudorapidity density, \rm dN_\rmch/\rm dη, in proton-proton (pp) collisions at √(s) = 13.6 TeV and in lead-lead (Pb-Pb) collisions at √s_\rmNN = 5.36 TeV are presented. The analysis is based on Run 3 data recorded in 2022 and 2023, using the upgraded ALICE detector at the LHC. The average charged-particle pseudorapidity density ⟨\rm dN_\rmch/\rm dη⟩ in pp collisions was measured at midrapidity (|η|<0.5) with the upgraded central barrel detectors, such as the Inner Tracking System and the Time Projection Chamber and, at forward pseudorapidity (-3.6 <|η|<- 2.4), using the newly installed Muon Forward Tracker (MFT). For Pb-Pb collisions, the measurement was performed in different centrality classes, ranging from the most central 0-5%) to the peripheral (70-80%) collisions.