CERN Accelerating science

Article
Title	Characterizing the initial state in Xe–Xe and Pb–Pb collisions using multiparticle cumulants
Author(s)	Dattamunsi, Aryaa (Indian Inst. Tech., Madras)
Collaboration	CMS Collaboration
Publication	2025
Number of pages	2
In:	J. Subatomic Part. Cosmol. 4 (2025) 100119
In:	The 10th Asian Triangle Heavy-Ion Conference, Berhampur, Odisha, India, 13 - 16 Jan 2025, pp.100119
DOI	10.1016/j.jspc.2025.100119 (publication)
Subject category	Particle Physics - Experiment ; Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	Xenon-xenon (Xe–Xe) collisions at a center-of-mass energy per nucleon pair sNN=5.44TeV provide a unique probe of nuclear deformation at the Large Hadron Collider (LHC). By comparing with lead-lead (Pb–Pb) collisions at sNN=5.36TeV, the dependence of flow harmonics (vn) on system size and initial geometry is studied. For the first time, correlations between multiple flow harmonics (v2, v3, and v4) using higher-order mixed harmonic cumulants are measured and compared across centrality classes between Xe–Xe and Pb–Pb collisions. The results, obtained with charged particles in |η|<2.4 and 0.5<pT<3.0 GeV/c, are compared to theoretical models, offering constraints on Xe deformation and insights into the quark-gluon plasma (QGP) evolution.
Copyright/License	publication: © 2025-2026 Elsevier Ltd

Corresponding record in: Inspire