Počet záznamů: 1

Long range rapidity correlations and jet production in high energy nuclear collisions

  1. 1.
    0336869 - UJF-V 2010 RIV US eng J - Článek v odborném periodiku
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    Long range rapidity correlations and jet production in high energy nuclear collisions.
    Physical Review. C. Roč. 80, č. 6 (2009), 064912/1-064912/9 ISSN 0556-2813
    Grant CEP: GA ČR GA202/07/0079; GA MŠk LC07048; GA MŠk LA09013
    Výzkumný záměr: CEZ:AV0Z10480505; CEZ:AV0Z10100502
    Klíčová slova: QUARK-GLUON PLASMA * CORRELATIONS * JETS
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
    Impakt faktor: 3.477, rok: 2009

    The STAR Collaboration at the Relativistic Heavy Ion Collider presents a systematic study of high-transverse-momentum charged-di-hadron correlations at small azimuthal pair separation Delta phi in d+Au and central Au+Au collisions at s(NN)=200 GeV. Significant correlated yield for pairs with large longitudinal separation Delta eta is observed in central Au+Au collisions, in contrast to d+Au collisions. The associated yield distribution in Delta eta x Delta phi can be decomposed into a narrow jet-like peak at small angular separation which has a similar shape to that found in d+Au collisions, and a component that is narrow in Delta phi and depends only weakly on Delta eta, the "ridge." Using two systematically independent determinations of the background normalization and shape, finite ridge yield is found to persist for trigger p(t)>6 GeV/c, indicating that it is correlated with jet production.
    Trvalý link: http://hdl.handle.net/11104/0181004