Measurement of J/psi -> N(N)over-bar branching ratios and estimate of the phase of the strong decay amplitude

Authors
Baldini, R Bertani, M Bini, C Calabrese, R De Falco, A Ferrer, ML Gauzzi, P Luppi, E Masoni, A Messi, R Paoluzi, L Pasqualucci, E Posocco, M Spinetti, M Voci, C
Citation
R. Baldini et al., Measurement of J/psi -> N(N)over-bar branching ratios and estimate of the phase of the strong decay amplitude, PHYS LETT B, 444(1-2), 1998, pp. 111-118
Citations number
25
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
444
Issue
1-2
Year of publication
1998
Pages
111 - 118
Database
ISI
SICI code
0370-2693(199812)444:1-2<111:MOJ-NB>2.0.ZU;2-L
Abstract
The results of new measurements of J/psi --> <n(n)over bar> and J/psi --> < p(p)over bar> performed by the FENICE experiment are reported. The relative phase phi, between the strong and the electromagnetic decay amplitudes, is achieved from the branching ratios J/psi --> <N(N)over bar> and from the n ucleon form factors measurements near the J/psi. It turns out phi = 89 degr ees +/- 15 degrees, in agreement with other J/psi, decay amplitudes. (C) 19 98 Elsevier Science B.V. All rights reserved.