| Preprint | |
| Report number | arXiv:2505.15161 |
| Title | Exploring Event-by-Event $\it{p}_{\rm T}$ Fluctuations in pp Collisions at $\sqrt{s} = 13$ TeV: An Insight from ALICE |
| Author(s) | Ali, Bushra (Aligarh Muslim U.) |
| Collaboration | ALICE Collaboration |
| Imprint | 2025-05-21 |
| Number of pages | 6 p, 6 |
| Presented at | The 10th Asian Triangle Heavy-Ion Conference, Berhampur, Odisha, India, 13 - 16 Jan 2025 |
| Subject category | nucl-ex ; Nuclear Physics - Experiment ; hep-ex ; Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ALICE |
| Abstract | Event-by-event fluctuations of the mean transverse momentum ($p_{\rm T}$) of relativistic charged particles are analyzed using the two-particle correlator $\sqrt{C_m}/M(p_{\rm T})_m$, which quantifies the correlations strength in units of the mean $p_{\rm T}$ in proton-proton collision at $\sqrt{s} = 13$ TeV in ALICE both for minimum bias and and high-multiplicity triggered events. The non-monotonic variations in $p_{\rm T}$ correlations with changing energy could serve as a signature of QGP formation. A comprehensive investigation across soft-, intermediate-, and hard-$p_{\rm T}$ regions could provide crucial insights into both equilibrium (e.g., thermal radial flow) and non-equilibrium (e.g., jet/minijet) contributions to $p_{\rm T}$ fluctuations. The dependence of the correlator on particle multiplicity for different $p_{\rm T}$ window widths and positions is explored. The correlator values are found to decrease with increasing charged particle density, following a power-law behavior similar to observations in both small and large systems at lower energies. Additionally, the influence of $p_{\rm T}$ range on the power-law coefficient is studied and results are compared with predictions from Monte Carlo models, such as PYTHIA (pQCD string model) and EPOS (core-corona model), to enhance understanding of the underlying mechanisms driving $p_{\rm T}$ fluctuations. |
| Other source | Inspire |
| Copyright/License | © 2025-2026 The Author(s) preprint: (License: CC BY-NC-ND 4.0) |
Record created 2025-05-23, last modified 2025-06-25
