Inclusive p 0 , ? , and direct photon production at high transverse momentum in p + p and d + Au collisions at s NN = 200 GeV
Inclusive p 0 , ? , and direct photon production at high transverse momentum in p + p and d + Au collisions at s NN = 200 GeV
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包括 p 0 , ?
DOI：
10.1103/physrevc.81.064904
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发表时间：
2010
影响因子：
3.1
通讯作者：
Abelev B
中科院分区：
文献类型：
--
作者：
Abelev B
We report a measurement of high-inclusive,, and direct photon production inandcollisions atat midrapidity (). Photons from the decaywere detected in the barrel electromagnetic calorimeter of the STAR experiment at the Relativistic Heavy Ion Collider. Thedecay was also observed and constituted the firstmeasurement by STAR. The first direct photon cross-section measurement by STAR is also presented; the signal was extracted statistically by subtracting the,, anddecay 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.
