Počet záznamů: 1

Center of mass energy and system-size dependence of photon production at forward rapidity at RHIC

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    0342821 - UJF-V 2011 RIV NL eng J - Článek v odborném periodiku
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    Center of mass energy and system-size dependence of photon production at forward rapidity at RHIC.
    Nuclear Physics. A. Roč. 832, 1-2 (2010), s. 134-147 ISSN 0375-9474
    Grant CEP: GA ČR GA202/07/0079; GA MŠk LA09013
    Výzkumný záměr: CEZ:AV0Z10480505; CEZ:AV0Z10100502
    Klíčová slova: particle production * photons * forward rapidity
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
    Impakt faktor: 1.986, rok: 2010

    We present the multiplicity and pseudorapidity distributions of photons produced in Au + Au and Cu + Cu collisions at root(NN)-N-s = 62.4 and 200 GeV. The photons are measured in the region -3.7 < eta < -2.3 using the photon Multiplicity detector in the STAR experiment at RHIC. The number of photons produced per average number of participating nucleon pairs increases with the beam energy and is independent of (lie collision centrality. For collisions with similar average numbers of participating nucleons the photon multiplicities are observed to be similar for An + Au and Cu + Cu collisions at a given beam energy. The ratios of the number of charged particles to photons in the measured pseudorapidity range are found to be 1.4 +/- 0.1 and 1.2 +/- 0.1 for root(NN)-N-s = 62.4 and 200 GeV, respectively.
    Trvalý link: http://hdl.handle.net/11104/0185447