Počet záznamů: 1

Inclusive pi(0), eta, and direct photon production at high transverse momentum in p plus p and d plus Au collisions at root s(NN)=200 GeV

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    0348021 - UJF-V 2011 RIV US eng J - Článek v odborném periodiku
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    Inclusive pi(0), eta, and direct photon production at high transverse momentum in p plus p and d plus Au collisions at root s(NN)=200 GeV.
    Physical Review. C. Roč. 81, č. 6 (2010), 064904/1-064904/26 ISSN 0556-2813
    Grant CEP: GA ČR GA202/07/0079; GA MŠk LA09013
    Výzkumný záměr: CEZ:AV0Z10480505; CEZ:AV0Z10100502
    Klíčová slova: BARREL ELECTROMAGNETIC CALORIMETER * TIME PROJECTION CHAMBER * HEAVY-ION COLLISIONS
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
    Impakt faktor: 3.416, rok: 2010

    We report a measurement of high-p(T) inclusive pi(0), eta, and direct photon production in p + p and d + Au collisions at root s(NN) = 200 GeV at midrapidity (0 < eta < 1). Photons from the decay pi(0) -> gamma gamma were detected in the barrel electromagnetic calorimeter of the STAR experiment at the Relativistic Heavy Ion Collider. The eta -> gamma gamma decay was also observed and constituted the first eta measurement by STAR. The first direct photon cross-section measurement by STAR is also presented; the signal was extracted statistically by subtracting the pi(0), eta, and omega(782) decay background from the inclusive photon distribution observed in the calorimeter. The analysis is described in detail, and the results are found to be in good agreement with earlier measurements and with next-to-leading-order perturbative QCD calculations.
    Trvalý link: http://hdl.handle.net/11104/0188646