Eur. Phys. J. C (1998) 5: 57-61
https://doi.org/10.1007/s100529800926

Experimental physics

Direct reconstruction of isosinglet amplitudes for nucleon-nucleon elastic scattering

¹ DAPNIA/SPhN, CEA/Saclay, F-91191, Gif-sur-Yvette Cedex, France
² Faculty of Physics, Freiburg University, D-7800, Freiburg im Br., Germany
³ DAPNIA/SPP, CEA/Saclay, F-91191, Gif-sur-Yvette Cedex, France
⁴ DPNC, Université de Genève, 24 quai Ernest Ansermet, CH-1211, Genève 4, Switzerland
⁶ LNP - JINR, 141980, Dubna, Moscow Region, Russia
⁷ Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Břehová 7, 11519, Prague 1, Czech Republic
⁸ Petersburg Nuclear Physics Institute, 188350, Gatchina, Russia
⁵ Centre for Subatomic Research, University of Alberta, T6G 2N5, Edmonton, Alberta, Canada

Received: 4 February 1998
Published online: 16 September 2013

Abstract

The direct reconstruction of the isospin I = 0 amplitudes is discussed under the assumption that the I = 1 amplitudes are known and that a sufficient number of independent np observables have been measured at a centre-of-mass angle θ. We show that at least one observable measured at angle π — θ is necessary in order to determine the I = 0 amplitudes, including the phase relative to the I = 1 amplitudes. Special cases at θ = 0, π/2 and π are also discussed.