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SUMMARY:Probing pT-dependent flow vector fluctuations with ALICE
DTSTART;VALUE=DATE-TIME:20201007T155500Z
DTEND;VALUE=DATE-TIME:20201007T161000Z
DTSTAMP;VALUE=DATE-TIME:20260515T135601Z
UID:indico-contribution-2346@cern.ch
DESCRIPTION:Speakers: Emil Gorm Nielsen (University of Copenhagen (DK))\nO
 ne of the main goals of ultra-relativistic nuclear collisions is to create
  a new state of matter called quark-gluon plasma (QGP) and study its prope
 rties. One of the experimental observables is the anisotropic flow $v_n$\,
  defined as correlation of azimuthal angle of each particle with respect t
 o a common symmetry plane $\\Psi_n$. The $v_n$ and $\\Psi_n$ represent the
  magnitude and the phase of a complex flow vector $V_n$\, respectively. Az
 imuthal anisotropies are traditionally measured using 2- and/or multi-part
 icle correlations over a large range in $p_\\mathrm{T}$ and $\\eta$. Howev
 er\, hydrodynamic calculations show that the event-by-event fluctuations i
 n the initial conditions and the dynamics during the system expansion lead
  to flow vector fluctuation in $p_\\mathrm{T}$ and/or $\\eta$ (also called
  de-correlations of flow vector)\, including flow magnitude and flow angle
  fluctuations.\\\\\nIn this talk\, we present the evidence of $p_{\\rm T}$
 -dependent flow vector fluctuations in Pb--Pb collisions at $\\sqrt{s_{_{\
 \rm NN}}}=5.02$ TeV\, using both $v_{n}\\{2\\}/v_n[2]$ and $r_{n}$ observa
 bles. In addition\, newly proposed four-particle correlations are used to 
 study the contributions of flow magnitude and flow angle fluctuations sepa
 rately. Considering that the size of flow vector fluctuations is sensitive
  to both initial conditions and the properties of the created QGP\, these 
 measurements will help us better constrain hydrodynamic models.\n\nhttps:/
 /indico.particle.mephi.ru/event/35/contributions/2346/
LOCATION:Zoom Heavy Ion
URL:https://indico.particle.mephi.ru/event/35/contributions/2346/
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