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SUMMARY:NBI Heavy-ion Physics Junior Seminar: Correlation between spatial 
 and momentum anisotropies
suggesting hydrodynamic evolution in high-ener
 gy collisions at the LHC
DTSTART:20260317T100000Z
DTEND:20260317T113000Z
DTSTAMP:20260418T232200Z
UID:indico-event-2272@indico.nbi.ku.dk
DESCRIPTION:Speakers: You Zhou (Niels Bohr Institute)\n\nTitle:  Correlat
 ion between spatial and momentum anisotropies suggesting hydrodynamic evo
 lution in high-energy collisions at the LHC\nSpeaker: Wenya Wu (Technische
  Universität München)\nAbstract: \nEvidence for partonic collectivity h
 as been observed in both large (Pb-Pb) and small (pp and p-Pb) collision s
 ystems at the LHC through measurements of the transverse-momentum-differen
 tial elliptic flow of identified particles. In particular\, the characteri
 stic baryon-meson grouping pattern\, compared with theoretical models\, su
 ggests that quark-coalescence hadronization exists across different collis
 ion systems. The hot and dense matter created in these high-energy collisi
 ons is widely regarded as a nearly perfect fluid and can be described succ
 essfully by hydrodynamic models. As a key observable characterizing azimut
 hal anisotropy in the transverse plane\, the flow coefficient reflects the
  initial-state geometry and the subsequent transport evolution of the syst
 em.\n \nAt the same time\, spatial information about the particle-emittin
 g source at the final stage can be accessed through femtoscopic momentum c
 orrelations. By combining three-dimensional femtoscopic source measurement
 s relative to the event plane with elliptic-flow studies using the event-s
 hape-engineering technique\, one can investigate the interplay between the
  spatial geometry of the source at freeze-out and the momentum-space aniso
 tropy of final-state particles\, thereby studying the hydrodynamic collect
 ivity of the system. Recent analyses show that the radii Rside and Rout\, 
 measured as functions of the azimuthal angle with respect to the event pla
 ne in different v2 classes\, exhibit larger oscillation amplitudes in even
 ts with stronger elliptic flow. These results demonstrate how collective f
 low influences the spatial geometry at freeze-out\, providing new constrai
 nts on the dynamical coupling between geometry and collective expansion.\n
 \nhttps://indico.nbi.ku.dk/event/2272/
LOCATION:NBB 2.4.G.092 (NBI)
URL:https://indico.nbi.ku.dk/event/2272/
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