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Invariant mass distributions for the pp to p p eta reaction at Q=10 MeV

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arxiv 0912.1592 v1 pith:WJBUYE2A submitted 2009-12-08 nucl-ex

Invariant mass distributions for the pp to p p eta reaction at Q=10 MeV

classification nucl-ex
keywords invariantmassbeendetermineddistributionsexcessproton-protonreaction
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Proton-proton and proton-eta invariant mass distributions and the total cross section for the pp to pp eta reaction have been determined near the threshold at an excess energy of Q=10 MeV. The experiment has been conducted using the COSY-11 detector setup and the cooler synchrotron COSY. The determined invariant mass spectra reveal significant enhancements in the region of low proton-proton relative momenta, similarly as observed previously at higher excess energies of Q=15.5 MeV and Q= 40MeV.

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