Hard pion and prompt photon at RHIC, from single to double inclusive production

Single pion and prompt photon large transverse momentum spectra in p-p and Au-Au collisions are computed in perturbative QCD at RHIC energy, √ s NN = 200 GeV. Next-to-leading order calculations are discussed and compared with p-p scattering data. Subsequently, quenching factors are computed to leading order for both pions and photons within the same energy loss model. The good agreement with PHENIX preliminary data allows for a lower estimate of the energy density reached in central Au-Au collisions, ǫ RHIC & 10 GeV/fm 3 . Double inclusive γ-π 0 production in p-p and Au-Au collisions is then addressed. Next-to-leading order corrections prove rather small in p-p scattering. In Au-Au collisions, the quenching of momentum-correlation spectra is seen to be sensitive to parton energy loss processes, which would help to understand how the fragmentation dynamics is modified in nuclear collisions at RHIC.

• Publication year

  2006

• Venue

  Journal of High Energy Physics

• Publication date

  2006-01-10

• Fields of study

  Physics

• Identifiers
  DOI 10.1088/1126-6708/2006/09/015arXiv hep-ph/0601075
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

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