Phys. Rev. Lett. 65, 2846–2849 (1990)Total cross section for p+p→p+p+π0 near threshold measured with the Indiana CoolerReceived 10 October 1990; published in the issue dated 3 December 1990 The total cross section for the reaction pp→ppπ0 was measured at nine center-of-mass energies from 1.5 to 23 MeV above threshold. The experiment was carried out with the Indiana Cooler, a recently constructed storage ring. The experimental advantages of an electron-cooled proton beam were utilized. The data cover an energy range where only the lowest possible angular momentum state contributes in the exit channel. The measured energy dependence of the total cross section is not compatible with that predicted by models of s-wave pion production and rescattering. © 1990 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.65.2846
DOI:
10.1103/PhysRevLett.65.2846
PACS:
25.10.+s, 13.75.Cs, 21.30.+y, 29.25.Fb
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