Observation of W decay in 500 GeV p+p collisions at RHIC

Details Observation of W decay in 500 GeV p+p collisions at RHIC Observation of W decay in 500 GeV p+p collisions at RHIC

2010-06-06

arxiv.org/abs/1006.1106v1

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, Proceedings of the Lake Louise Winter Institute, 15th-20th February 2010, Alberta, Canada

Scientific paper

W boson production is observed in $\sqrt{s}=500$ GeV proton proton collisions at RHIC-PHENIX experiment. The single longitudinal spin asymmetry $A_L(\overrightarrow{p}p\rightarrow W^+X)$ is measured via decay positrons in the mid rapidity region. The asymmetry $-0.83\pm0.31\pm(11%$ scale uncertainty) is consistent with calculations from various polarized parton distribution functions.

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