4 pi-decays of scalar and vector mesons

Citation
A. Abele et al., 4 pi-decays of scalar and vector mesons, EUR PHY J C, 21(2), 2001, pp. 261-269
Citations number
30
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
21
Issue
2
Year of publication
2001
Pages
261 - 269
Database
ISI
SICI code
1434-6044(200106)21:2<261:4POSAV>2.0.ZU;2-U
Abstract
Two different pn annihilation modes, (p) over barn --> pi (-)4 pi (0) and ( p) over barn --> 2 pi (-)2 pi (0)pi (+), are used to study the 4 pi -decays of scalar and vector mesons. The data are dominated by 4 pi scalar isoscal ar interactions. At least two states are needed, the f(0)(1370) and the f(0 )(1500). The 4 pi -decay width of the f(0)(1370) is more than 6 times large r than the sum of all observed partial decay widths to two pseudoscalar mes ons. The state has important couplings to (pi pi )s(pi pi )s and to pp. The 4 pi -decays of the f(0)(1500) represent about half of its total width. Th e p(1450) and the p(1700) are observed in several 4 pi decay modes. The rat io of the 4 pi relative to the 2 pi decay of the p(1450) is in contradictio n to its proposed interpretation as a pure hybrid state but it suggests tha t it is not a pure 2(3)S(1)-state either. Our results favour the assignment of the p(1700) as D-3(1) state, its interpretation as 3(3)S(1)-state is le ss plausible.