Emerging picture of hard scattering phenomena in p + p collisions at in ALICE

✍ Scribed by Jan Rak

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 277 KB
• Volume: 855
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2011.02.106

✦ Synopsis

In the first LHC 2009 and 2010 runs the ALICE experiment collected about 10 μb -1 at √ s=900 GeV and more than 20 nb -1 at √ s=7 TeV of minimum bias p + p events. This huge sample of unique data provides an excellent test bench for the pQCD description of hard scattering phenomena at the highest center of mass energy p + p collisions ever recorded. These data are used to study the universality of the charged hadron invariant yields measured by the ALICE experiment in terms of x T scaling. Leading particle associated yield is used to study the angular correlations. A comparison of per-trigger yield in √ s=900 GeV and √ s=7 TeV data samples is presented. An increasing role of the soft QCD radiation is deduced from the slope of the associated particle yield in the region perpendicular to the leading particle.