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

@article{hayrapetyan2026observation,
  title = {{Observation of Long-Range Collective Flow in O + O and Ne + Ne Collisions and Implications for Nuclear Structure Studies}},
  author = {A Hayrapetyan and В. Макаренко and A. Tumasyan and W. Adam and L. Benato and T. Bergauer and M. Dragicevic and C. Giordano and Priya Sajid Hussain and M. Jeitler and Natascha Krammer and A. Li and D. Liko and M. Matthewman and J. Schieck and R. Schöfbeck and Maryam Shooshtari and M. Sonawane and W. Waltenberger and C.-E. Wulz and X. Janssen and H. Kwon and Daniel Ocampo Henao and T. Van Laer and Pierre Van Mechelen A and Jas Bierkens and N. Breugelmans and J. D’Hondt and Soumya Dansana and A. De Moor and M. Delcourt and F. Heyen and Y. Hong and Pavlo Kashko and S. Lowette and Inna Makarenko and D. Müller and Juhee Song and S. Tavernier and M. Tytgat and G. P. Van Onsem and S. Van Putte and David Vannerom and B. Bilin and B. Clerbaux and A. K. Das and I. De Bruyn and G. De Lentdecker and Hugues Evard and L. Favart and P. Gianneios and Ali Khalilzadeh and Fakhri Alam Khan and Andrea Malara and M. A. Shahzad and A. Sharma and Laurent Thomas and M. Vanden Bemden and Catherine Vander Velde and Pascal Vanlaer},
  journal = {Physical Review Letters},
  year = {2026},
  month = may,
  doi = {10.1103/26wx-tg6f},
  url = {https://doi.org/10.1103/26wx-tg6f},
  note = {CC BY},
}

TY  - JOUR
TI  - Observation of Long-Range Collective Flow in O + O and Ne + Ne Collisions and Implications for Nuclear Structure Studies
AU  - A Hayrapetyan
AU  - В. Макаренко
AU  - A. Tumasyan
AU  - W. Adam
AU  - L. Benato
AU  - T. Bergauer
AU  - M. Dragicevic
AU  - C. Giordano
AU  - Priya Sajid Hussain
AU  - M. Jeitler
AU  - Natascha Krammer
AU  - A. Li
AU  - D. Liko
AU  - M. Matthewman
AU  - J. Schieck
AU  - R. Schöfbeck
AU  - Maryam Shooshtari
AU  - M. Sonawane
AU  - W. Waltenberger
AU  - C.-E. Wulz
AU  - X. Janssen
AU  - H. Kwon
AU  - Daniel Ocampo Henao
AU  - T. Van Laer
AU  - Pierre Van Mechelen A
AU  - Jas Bierkens
AU  - N. Breugelmans
AU  - J. D’Hondt
AU  - Soumya Dansana
AU  - A. De Moor
AU  - M. Delcourt
AU  - F. Heyen
AU  - Y. Hong
AU  - Pavlo Kashko
AU  - S. Lowette
AU  - Inna Makarenko
AU  - D. Müller
AU  - Juhee Song
AU  - S. Tavernier
AU  - M. Tytgat
AU  - G. P. Van Onsem
AU  - S. Van Putte
AU  - David Vannerom
AU  - B. Bilin
AU  - B. Clerbaux
AU  - A. K. Das
AU  - I. De Bruyn
AU  - G. De Lentdecker
AU  - Hugues Evard
AU  - L. Favart
AU  - P. Gianneios
AU  - Ali Khalilzadeh
AU  - Fakhri Alam Khan
AU  - Andrea Malara
AU  - M. A. Shahzad
AU  - A. Sharma
AU  - Laurent Thomas
AU  - M. Vanden Bemden
AU  - Catherine Vander Velde
AU  - Pascal Vanlaer
PY  - 2026
DA  - 2026/05/15
JO  - Physical Review Letters
DO  - 10.1103/26wx-tg6f
UR  - https://doi.org/10.1103/26wx-tg6f
AB  - 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.
SN  - 0031-9007
SN  - 1079-7114
SN  - 1092-0145
ER  -