AMBIGUITIES IN THE ETA-NUCLEON SCATTERING LENGTH DETERMINATION

Authors
BIRBRAIR BL GRIDNEV AB
Citation
Bl. Birbrair et Ab. Gridnev, AMBIGUITIES IN THE ETA-NUCLEON SCATTERING LENGTH DETERMINATION, ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 354(1), 1996, pp. 95-97
Citations number
8
Categorie Soggetti
Physics, Nuclear","Physics, Particles & Fields
Journal title
ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI → ACNP
ISSN journal
09397922
Volume
354
Issue
1
Year of publication
1996
Pages
95 - 97
Database
ISI
SICI code
0939-7922(1996)354:1<95:AITESL>2.0.ZU;2-V
Abstract
The positive sign of the eta-nucleon scattering length b(eta N) was pr edicted in [1] assuming the resonance mechanism for the pi(-)p --> eta n reaction. We demonstrate that (a) the assumption about the t-channe l mechanism of the reaction leads to b(eta N) < 0 and (b) the experime ntal data on the eta production cross section are equally compatible w ith both resonance and t-channel mechanisms.