Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-12-21
Physics
High Energy Physics
High Energy Physics - Experiment
Proceedings for SPIN 2010 Conference, Juelich, Germany, September 27 - October 2, 2010
Scientific paper
We report the measurement of the parity violating single spin asymmetries for inclusive high transverse momentum electrons and positrons in polarized $p+p$ collisions at a center of mass energy of $\sqrt{s}=500$ GeV with the PHENIX detector at RHIC. These electrons are attributed to the decay of $W^\pm$ and $Z^0$ bosons, and measured production cross section is consistent with the expectations. The $W$ production is confirmed for the first time in $p+p$ collisions. Its spin asymmetry in the polarized $p+p$ collisions is a important probe for the quark flavor decomposition of the proton spin.
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