Počet záznamů: 1

Beam-energy and system-size dependence of dynamical net charge fluctuations

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    0338523 - UJF-V 2010 RIV US eng J - Článek v odborném periodiku
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    Beam-energy and system-size dependence of dynamical net charge fluctuations.
    Physical Review. C. Roč. 79, č. 2 (2009), 024906/1-024906/14 ISSN 0556-2813
    Grant CEP: GA ČR GA202/07/0079; GA MŠk LC07048
    Výzkumný záměr: CEZ:AV0Z10480505; CEZ:AV0Z10100502
    Klíčová slova: NET CHARGE * DYNAMICAL FLUCTUATIONS * HEAVY-ION COLLISIONS
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
    Impakt faktor: 3.477, rok: 2009

    We present measurements of net charge fluctuations in Au+Au collisions at s(NN)=19.6, 62.4, 130, and 200 GeV, Cu+Cu collisions at s(NN)=62.4 and 200 GeV, and p+p collisions at s=200 GeV using the dynamical net charge fluctuations measure nu(+-,dyn). We observe that the dynamical fluctuations are nonzero at all energies and exhibit a modest dependence on beam energy. A weak system size dependence is also observed. We examine the collision centrality dependence of the net charge fluctuations and find that dynamical net charge fluctuations violate 1/N-ch scaling but display approximate 1/N-part scaling. We also study the azimuthal and rapidity dependence of the net charge correlation strength and observe strong dependence on the azimuthal angular range and pseudorapidity widths integrated to measure the correlation.
    Trvalý link: http://hdl.handle.net/11104/0182272