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Single Spin Asymmetry $A_N$ in Polarized Proton-Proton Elastic Scattering at $\sqrt{s}=200$ GeV
- Source :
- Physics Letters B, Physics Letters B, Elsevier, 2013, 719, pp.62-69. ⟨10.1016/j.physletb.2013.01.014⟩
- Publication Year :
- 2013
- Publisher :
- HAL CCSD, 2013.
-
Abstract
- We report a high precision measurement of the transverse single spin asymmetry $A_N$ at the center of mass energy $\sqrt{s}=200$ GeV in elastic proton-proton scattering by the STAR experiment at RHIC. The $A_N$ was measured in the four-momentum transfer squared $t$ range $0.003 \leqslant |t| \leqslant 0.035$ $\GeVcSq$, the region of a significant interference between the electromagnetic and hadronic scattering amplitudes. The measured values of $A_N$ and its $t$-dependence are consistent with a vanishing hadronic spin-flip amplitude, thus providing strong constraints on the ratio of the single spin-flip to the non-flip amplitudes. Since the hadronic amplitude is dominated by the Pomeron amplitude at this $\sqrt{s}$, we conclude that this measurement addresses the question about the presence of a hadronic spin flip due to the Pomeron exchange in polarized proton-proton elastic scattering.<br />12 pages, 6 figures
- Subjects :
- High Energy Physics - Experiment (hep-ex)
Nuclear Theory
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
FOS: Physical sciences
High Energy Physics::Experiment
Nuclear Experiment (nucl-ex)
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Nuclear Experiment
High Energy Physics - Experiment
Subjects
Details
- Language :
- English
- ISSN :
- 03702693
- Database :
- OpenAIRE
- Journal :
- Physics Letters B, Physics Letters B, Elsevier, 2013, 719, pp.62-69. ⟨10.1016/j.physletb.2013.01.014⟩
- Accession number :
- edsair.doi.dedup.....41c3b63faee2b2366d8494ed393ad834