Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-10-11
Physics
High Energy Physics
High Energy Physics - Experiment
Talk presented at 11th International Conference on Elastic and Diffractive Scattering: Towards High Energy Frontiers: The 20th
Scientific paper
We report on the first measurement of the single spin analyzing power ($A\_N$) at $\sqrt{s}=200$ GeV, obtained by the pp2pp experiment using polarized proton beams at the Relativistic Heavy Ion Collider (RHIC). Data points were measured in the four momentum transfer $t$ range $0.01 \leq |t| \leq 0.03$ $\GeVcSq$. Our result is about one standard deviation above the calculation, which uses interference between electromagnetic spin-flip amplitude and hadronic non-flip amplitude, the source of $A\_N$. The difference could be explained by an additional contribution of a hadronic spin-flip amplitude to $A\_N$.
Sandacz Andrzej
the PP2PP Collaboration
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