Observation of Long-Range Collective Flow in; <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline">; <mml:mrow>; <mml:mi mathvariant="normal">O</mml:mi>; <mml:mo>+</mml:mo>; <mml:mi mathvariant="normal">O</mml:mi>; </mml:mrow>; </mml:math>; and; <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline">; <mml:mrow>; <mml:mi>Ne</mml:mi>; <mml:mo>+</mml:mo>; <mml:mi>Ne</mml:mi>; </mml:mrow>; </mml:math>; Collisions and Implications for Nuclear Structure Studies | CU Experts

; 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 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; ; ; ; ; O; ; ; ; ; 16; ; ; ; ; and; ; ; ; ; Ne; ; ; ; ; 20; ; ; ; ; ions, respectively.;

Hayrapetyan A; Makarenko V; Tumasyan A; Adam W; Benato L; Bergauer T; Dragicevic M; Giordano C; Hussain PS; Jeitler M

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