Szczegóły publikacji

Opis bibliograficzny

Measurement of the azimuthal anisotropy of charged particles in $\sqrt{s_{NN}}=$ 5.36 TeV $^{16}O + ^{16}O$ and $^{20}Ne + ^{20}Ne$ collisions with the ATLAS detector / G. Aad, [et al.], L. ADAMCZYK, [et al.], P. BALEK, [et al.], T. BOŁD, [et al.], K. M. CIEŚLA, [et al.], W. DĄBROWSKI, [et al.], K. DOMIJAN, [et al.], M. DYNDAŁ, [et al.], A. K. GILBERT, [et al.], I. GRABOWSKA-BOŁD, [et al.], S. KOPERNY, [et al.], K. MAJ, [et al.], B. MINDUR, [et al.], Ł. MŁYNARSKA, [et al.], P. MOSZKOWICZ, [et al.], P. A. POTĘPA, [et al.], M. PRZYBYCIEŃ, [et al.], P. RYBCZYŃSKI, [et al.] // Physical Review . C ; ISSN 2469-9985. — Tytuł poprz.: Physical Review. C, Nuclear Physics ; ISSN: 0556-2813. — 2026 — vol. 113 iss. 4 art. no. 045205, s. 045205-1–045205-30. — Bibliogr. s. 045205-15–045205-17, Abstr. — Publikacja dostępna online od: 2026-04-13

Autorzy (2965)

Dane bibliometryczne

ID BaDAP	167190
Data dodania do BaDAP	2026-05-11
Tekst źródłowy	URL
DOI	10.1103/xqxz-8bhf
Rok publikacji	2026
Typ publikacji	artykuł w czasopiśmie
Otwarty dostęp
Creative Commons
Czasopismo/seria	Physical Review, C

Abstract

This paper presents the first measurements of the azimuthal anisotropy coefficients vn, which quantify the nth-order Fourier modulation of charged-particle azimuthal distributions, for n=2−4 in sNN=5.36TeVO16+O16 and Ne20+Ne20 collisions recorded with the ATLAS detector at the CERN Large Hadron Collider in 2025. The vn coefficients are measured as a function of transverse momentum (pT), collision centrality, and event multiplicity. They are extracted using two complementary methods: two-particle correlations with a template-fit subtraction of short-range nonflow contributions, and four-particle subevent cumulants, which intrinsically suppress nonflow effects and provide sensitivity to flow fluctuations. The results show a clear hierarchy v2>v3>v4 and a nonmonotonic dependence on pT, reaching a maximum around 2GeV, consistent with trends observed in heavy-ion collisions. Detailed comparisons between the two collision systems reveal an enhanced v2 in central Ne20+Ne20 collisions, consistent with theory expectations based on the predicted prolate deformation of neon nuclei, in contrast to the slightly tetrahedral structure predicted for oxygen. The four-particle cumulant results highlight strong event-by-event fluctuations and provide the greatest sensitivity to nuclear shape effects. These measurements can place new constraints on the initial geometry and the hydrodynamic response in light-ion collisions, offering valuable input for models of nuclear structure.

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