TY - JOUR
T1 - Characterizing the initial state and dynamical evolution in XeXe and PbPb collisions using multiparticle cumulants
AU - D.SosnovJr.The CMS Collaboration
AU - Hayrapetyan, A.
AU - Makarenko, V.
AU - Tumasyan, A.
AU - Adam, W.
AU - Andrejkovic, J. W.
AU - Benato, L.
AU - Bergauer, T.
AU - Dragicevic, M.
AU - Giordano, C.
AU - Hussain, P. S.
AU - Jeitler, M.
AU - Krammer, N.
AU - Li, A.
AU - Liko, D.
AU - Mikulec, I.
AU - Schieck, J.
AU - Schöfbeck, R.
AU - Schwarz, D.
AU - Shooshtari, M.
AU - Sonawane, M.
AU - Waltenberger, W.
AU - Wulz, C. E.
AU - Janssen, T.
AU - Kwon, H.
AU - Ocampo Henao, D.
AU - Van Laer, T.
AU - Van Mechelen, P.
AU - Bierkens, J.
AU - Breugelmans, N.
AU - D’Hondt, J.
AU - Dansana, S.
AU - De Moor, A.
AU - Delcourt, M.
AU - Heyen, F.
AU - Hong, Y.
AU - Kashko, P.
AU - Lowette, S.
AU - Makarenko, I.
AU - Müller, D.
AU - Song, J.
AU - Cappati, A.
AU - Beaudette, F.
AU - Davignon, O.
AU - De Wit, A.
AU - de Cassagnac, R. Granier
AU - Nguyen, M.
AU - Ochando, C.
AU - Sirois, Y.
AU - Zabi, A.
AU - Zghiche, A.
N1 - Publisher Copyright:
© 2026 The Authors.
PY - 2026/5/1
Y1 - 2026/5/1
N2 - For the first time, correlations among mixed-order moments of two or three flow harmonics —(vnk,vml) and (vnk,vml,vpq), with k, l , and q denoting the respective orders—are measured in xenon–xenon (XeXe) collisions and compared with lead–lead (PbPb) results, providing a novel probe of collective behavior in heavy ion collisions. These measurements compare a nearly spherical, doubly-magic 208Pb nucleus to a triaxially deformed 129Xe nucleus, emphasizing the sensitivity to initial-state geometry fluctuations arising from nuclear deformation. The dependence of these results (vn , n=2,3,4) on the shape and size of the nuclear overlap region is studied. Comparisons between v 2, v 3, and v 4 demonstrate the importance of v 3 and v 4 in exploring the nonlinear hydrodynamic response of the quark-gluon plasma (QGP) to the initial spatial anisotropy. The results constrain initial-state model parameters that influence the evolution of the QGP. The CMS detector was used to collect XeXe and PbPb data at nucleon-nucleon center-of-mass energies of SNN=5.44 and 5.36 TeV, respectively. Correlations are extracted using multiparticle mixed-harmonic cumulants (up to eight-particle cumulants) with charged particles in the pseudorapidity range | η | ' 2.4 and transverse momentum range 0.5 ' pT ' 3 GeV/c.
AB - For the first time, correlations among mixed-order moments of two or three flow harmonics —(vnk,vml) and (vnk,vml,vpq), with k, l , and q denoting the respective orders—are measured in xenon–xenon (XeXe) collisions and compared with lead–lead (PbPb) results, providing a novel probe of collective behavior in heavy ion collisions. These measurements compare a nearly spherical, doubly-magic 208Pb nucleus to a triaxially deformed 129Xe nucleus, emphasizing the sensitivity to initial-state geometry fluctuations arising from nuclear deformation. The dependence of these results (vn , n=2,3,4) on the shape and size of the nuclear overlap region is studied. Comparisons between v 2, v 3, and v 4 demonstrate the importance of v 3 and v 4 in exploring the nonlinear hydrodynamic response of the quark-gluon plasma (QGP) to the initial spatial anisotropy. The results constrain initial-state model parameters that influence the evolution of the QGP. The CMS detector was used to collect XeXe and PbPb data at nucleon-nucleon center-of-mass energies of SNN=5.44 and 5.36 TeV, respectively. Correlations are extracted using multiparticle mixed-harmonic cumulants (up to eight-particle cumulants) with charged particles in the pseudorapidity range | η | ' 2.4 and transverse momentum range 0.5 ' pT ' 3 GeV/c.
KW - CMS
KW - Flow
KW - Heavy ion
KW - QGP
KW - System size
UR - https://www.scopus.com/pages/publications/105036006648
U2 - 10.1016/j.physletb.2026.140359
DO - 10.1016/j.physletb.2026.140359
M3 - Article
AN - SCOPUS:105036006648
SN - 0370-2693
VL - 876
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 140359
ER -