Eur. Phys. J. C (1998) 4: 607-621
https://doi.org/10.1007/s100529800946

Experimental physics

Direct reconstruction of pp elastic scattering amplitudes and phase shift analyses at fixed energies from 1.80 to 2.70 GeV

¹ DAPNIA/SPP, CEA/Saclay, F-91191, Gif sur Yvette, Cedex, France
² DPNC, University of Geneva, 24, quai Ernest-Ansermet, 1211, Geneva 4, Switzerland

Abstract

The direct reconstruction of the pp elastic-scattering amplitudes and fixed-energy Saclay-Geneva phase shift analyses have been carried out at 1.80, 2.10, 2.40 and 2.70 GeV where complete sets of observables have recently been measured at SATURNE. They provide unique phase shift analysis solutions at 1.80, 2.10 and 2.40 GeV and two solutions at 2.70 GeV. Results of the direct amplitude reconstruction and the Saclay-Geneva phase shift analyses agree at all energies. Results are also compared to the Virginia Polytechnic Institute phase-shift predictions below 2.55 GeV and observed differences are discussed.