THE NEW DETERMINATION OF THE ETA-N S-WAVE SCATTERING LENGTH FROM A 3-CHANNEL, MULTI-RESONANCE AMPLITUDE ANALYSIS

Authors
BATINIC M DADIC I SLAUS I SVARC A NEFKENS BMK LEE TSH
Citation
M. Batinic et al., THE NEW DETERMINATION OF THE ETA-N S-WAVE SCATTERING LENGTH FROM A 3-CHANNEL, MULTI-RESONANCE AMPLITUDE ANALYSIS, Physica scripta. T, 58(1), 1998, pp. 15-18
Citations number
17
Categorie Soggetti
Physics
Journal title
Physica scripta. T → ACNP
ISSN journal
02811847
Volume
58
Issue
1
Year of publication
1998
Pages
15 - 18
Database
ISI
SICI code
0281-1847(1998)58:1<15:TNDOTE>2.0.ZU;2-F
Abstract
A three-channel multi-resonance, unitary model developed in 1995 is us ed to determine the pi N --> eta N and eta N --> eta N amplitudes by r e-analyzing the available data on pi N elastic scattering and the weig hted data for the pi N --> eta N total and differential cross sections . The input pi N elastic scattering amplitude in the S-11 channel has been improved, following suggestions of G. Hohler. Our new result of e ta N scattering length, a(eta N) = (0.717 +/- 0.030) + i . (0.263 +/- 0.025) fm, suggests that the eta d system is unbound or loosely bound.