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SUMMARY:Suppression of high-pt heavy-flavour particles in Pb-Pb collisions
  at the LHC\, measured with the ALICE detector
DTSTART;VALUE=DATE-TIME:20120705T234500Z
DTEND;VALUE=DATE-TIME:20120706T000000Z
DTSTAMP;VALUE=DATE-TIME:20130519T180958Z
UID:indico-contribution-382@cern.ch
DESCRIPTION:Speakers: Dr. DAINESE\, Andrea (INFN Padova (IT))\nThe ALICE e
 xperiment studies nucleus-nucleus collisions at the LHC in order to invest
 igate the properties of QCD matter at extreme energy densities. The measur
 ement of open charm and open beauty production allows to probe the mechani
 sms of heavy-quark propagation\, energy loss and hadronization in the hot 
 and dense medium formed in high-energy nucleus-nucleus collisions. In part
 icular\, in-medium energy loss is predicted to be different for massless p
 artons (light quarks and gluons) and heavy quarks at moderate momentum. Th
 e ALICE apparatus allows us to measure open heavy-flavour particles in sev
 eral decay channels and with a wide phase-space coverage.\n\nWe present th
 e results on the nuclear modification factors for heavy flavour particle p
 roduction in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV.\n\nUsing proton-pr
 oton and lead-lead collision samples at sqrt(s) =2.76 and 7 TeV and at sqr
 t(s_NN) = 2.76 TeV\, respectively\,  nuclear modification factors R_AA(pt)
  were measured for D mesons at central rapidity (via displaced decay verte
 x reconstruction)\, and for electrons and muons from heavy flavour decays\
 , at central and forward rapidity\, respectively.\n\nThe large suppression
  observed in the high pt region\, by a factor 2.5-4 in central Pb-Pb colli
 sions with respect to the pp reference\, indicates a strong in-medium ener
 gy loss of heavy quarks.\n\nhttp://indico.cern.ch/contributionDisplay.py?c
 ontribId=382&sessionId=73&confId=181298
LOCATION:Melbourne Convention and Exhibition Centre Room 217
URL:http://indico.cern.ch/contributionDisplay.py?contribId=382&sessionId=7
 3&confId=181298
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