| Preprint | |
| Report number | arXiv:2409.18560 |
| Title | Charged-particle production in pp collisions at $\sqrt{s}$ = 13.6 TeV and Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.36 TeV with ALICE |
| Author(s) | Modak, Abhi (U. Brescia) |
| Collaboration | ALICE Collaboration |
| Imprint | 2024-09-27 |
| Number of pages | 6 |
| Note | 6 pages, 3 figures; proceedings of the 42nd International Conference on High Energy Physics (ICHEP2024) |
| Presented at | 42nd International Conference on High Energy Physics (ICHEP 2024), Prague, Czech Republic, 18 - 24 Jul 2024, pp. |
| Subject category | hep-ex ; Particle Physics - Experiment ; nucl-ex ; Nuclear Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ALICE |
| Abstract | This article presents the measurement of charged-particle pseudorapidity ($\eta$) density, $\mathrm{d}N_{\rm ch}/\mathrm{d}\eta$, in proton$-$proton (pp) collisions at a centre-of-mass energy $\sqrt{s}$ = 13.6 TeV, and in lead$-$lead (Pb$-$Pb) collisions at a centre-of-mass energy per nucleon pair $\sqrt{s_{\mathrm{NN}}}$ = 5.36 TeV. The analysis is performed using the Run 3 data recorded during 2022 and 2023 by the upgraded ALICE detector. The charged-particle multiplicity is measured at midrapidity ($|\eta|<1$) using the new monolithic active pixel sensors-based Inner Tracking System and the Time Projection Chamber upgraded with Gas Electron Multiplier-based readout system. The measurements in pp collisions are reported for inelastic events with at least one charged particle having $|\eta|<1$ whereas for Pb$-$Pb collisions, the $\mathrm{d}N_{\rm ch}/\mathrm{d}\eta$ is obtained for different centrality classes, ranging from 0$-$5% (most central) to 70$-$80% (most peripheral). The energy dependence of average charged-particle pseudorapidity density ($\langle \mathrm{d}N_{\rm ch}/\mathrm{d}\eta \rangle$) measured in $|\eta|<0.5$ is studied and compared to earlier measurements at lower collision energies. In Pb$-$Pb collisions, the evolution of $\langle \mathrm{d}N_{\rm ch}/\mathrm{d}\eta \rangle$ as a function of the average number of participating nucleons, $\langle N_{\mathrm{part}} \rangle$, determined with a Glauber model, is also studied and compared with predictions from theoretical models. |
| Other source | Inspire |
| Copyright/License | preprint: (License: CC BY 4.0) |
Записът е създаден на 2024-10-01, последна промяна на 2024-11-11