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SUMMARY:Correlations and collective flow in pp and p+Pb collisions at the 
 LHC energies
DTSTART;VALUE=DATE-TIME:20160524T164000Z
DTEND;VALUE=DATE-TIME:20160524T170000Z
DTSTAMP;VALUE=DATE-TIME:20190325T155905Z
UID:indico-contribution-1978362@indico.cern.ch
DESCRIPTION:Speakers: Xiangrong Zhu (Peking University)\nFlow measurements
  in p+Pb collisions at $\\sqrt{s_{\\rm NN}}$=5.02 TeV have indicated the d
 evelopment of collective flow in the small systems\ncreated at the LHC. Us
 ing the ultrarelativistic quantum molecular dynamics (UrQMD) model\, we in
 vestigate the azimuthal correlations \nin p+Pb collisions at $\\sqrt{s_{\\
 rm NN}}$=5.02 TeV with two- and four-particle cumulants. Our calculations 
 indicate that pure hadronic interactions\ncan not generate the collective 
 flow as measured in experiments\, additional effects from initial state an
 d/or from the QGP are needed to\nreproduce the flow data[1]. Using the sam
 e flow analysis method\, we explore the collective flow in pp collisions a
 t $\\sqrt{s}$=13 TeV\nwith two different baseline calculations[2]\, includ
 ing: 1. VISHNU hybrid model simulations that connect viscous hydrodynamics
  for the QGP\nexpansion and UrQMD for the hadron resonance gas evolution\,
  using smooth initial conditions\, \n2. VISHNU simulations with fluctuatin
 g initial conditions. Our calculations of multiplicity dependent elliptic 
 flow\nare comparable with the recent measurements from ATLAS. We find that
  triangular flow (if observed) is one of the unique observable directly\na
 ssociated with the domain structures in the created small pp systems.\n\n\
 nReferences:\n\n[1] Y. Zhou\, X. Zhu\, P. Li and H. Song\,\n  "Investigati
 on of possible hadronic flow in $\\sqrt{s_{\\rm NN}}$=5.02TeV p+Pb collisi
 ons\,''  Phys. Rev. C 91\, no. 6\, 064908 (2015).\n\n[2] X. Zhu\, H. j. Xu
 \, Y. Zhou\, W. T. Deng and H. Song\, in preparation.\n\nhttps://indico.ce
 rn.ch/event/469857/contributions/1978362/
LOCATION:Centro de Congressos\, Instituto Superior Técnico\, Alameda Camp
 us Room 02.2
URL:https://indico.cern.ch/event/469857/contributions/1978362/
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