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Observation of Long-Range Collective Flow in O + O and Ne + Ne Collisions and Implications for Nuclear Structure Studies

CMS Collaboration; Hayrapetyan, A.; Makarenko, V.; Tumasyan, A.; Adam, W.; Benato, L.; Bergauer, T.; Dragicevic, M.; Giordano, C.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Li, A.; Liko, D.; Matthewman, M.; Schieck, J.; Schöfbeck, R.; Shooshtari, M.; Sonawane, M.; ... mehr

Abstract:

The long-range collective flow of particles produced in oxygen-oxygen (O+O) and neon-neon (Ne+Ne) collisions is measured with the CMS detector at the CERN LHC. The data samples were collected at a center-of-mass energy per nucleon pair of 5.36 TeV, with integrated luminosities of 7  nb$^{−1}$ and 0.8  nb$^{−1}$ for O+O and Ne+Ne collisions, respectively. Two- and four-particle azimuthal correlations are measured over nearly five units of pseudorapidity. Significant elliptic (𝑣$_2$) and triangular (𝑣$_3$) flow harmonics are observed in both systems. The ratios of 𝑣$_𝑛$ coefficients between Ne+Ne and O+O collisions suggest sensitivity to the intrinsic nuclear structure of the respective Ne and O ions. Hydrodynamic models with ab initio nuclear structure inputs qualitatively reproduce the collision-overlap dependence of both the 𝑣$_𝑛$ values and the Ne+Ne to O+O ratios. These measurements provide new constraints when modeling the interplay of nuclear structure and collective dynamics in collisions of $^{16}$O and $^{20}$Ne ions, respectively.


Verlagsausgabe §
DOI: 10.5445/IR/1000197086
Veröffentlicht am 17.09.2026
Originalveröffentlichung
DOI: 10.1103/26wx-tg6f
Scopus
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Algebra und Geometrie (IAG)
Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Scientific Computing Center (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 08.2026
Sprache Englisch
Identifikator ISSN: 1079-7114, 0031-9007, 1092-0145
KITopen-ID: 1000197086
Erschienen in Physical Review Letters
Verlag American Physical Society (APS)
Band 137
Heft 8
Seiten Art.Nr: 082302
Vorab online veröffentlicht am 17.08.2026
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