Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2002-09-06
Phys.Rev.Lett. 90 (2003) 142301
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.90.142301
At the Cooler Synchrotron COSY/J\"ulich spin correlation parameters in elastic proton-proton (pp) scattering have been measured with a 2.11 GeV polarized proton beam and a polarized hydrogen atomic beam target. We report results for A$_{NN}$, A$_{SS}$, and A_${SL}$ for c.m. scattering angles between 30$^o$ and 90$^o$. Our data on A$_{SS}$ -- the first measurement of this observable above 800 MeV -- clearly disagrees with predictions of available of pp scattering phase shift solutions while A$_{NN}$ and A_${SL}$ are reproduced reasonably well. We show that in the direct reconstruction of the scattering amplitudes from the body of available pp elastic scattering data at 2.1 GeV the number of possible solutions is considerably reduced.
Bauer Florian
Bisplinghoff J.
Busch Marco
Büßer K.
Colberg T.
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