Comments on light isoscalar scalar states
- Queen Mary and Westfield College, London E1 4NS (United Kingdom)
In our recent investigations, we found that the {ital f}{sub 0}(975) has a large decay width about 400 MeV due to its broad third-sheet pole and a narrow peak width about 46 MeV due to its narrow second-sheet pole. With t-channel {rho} and {ital f}{sub 2}(1275) exchange and the {ital s}-channel resonance {ital f}{sub 0}(975), we reproduce the {pi}{pi} S-wave scattering phase shift up to 1.3 GeV quite well. The broad {sigma}(400) and {ital f}{sub 0}(1400) poles are produced by t-channel meson exchange interactions. The two members of 1{sup 3}{ital P}{sub 0} {ital q{bar q}} nonet are suggested to be {ital f}{sub 0}(975) and {ital f}{sub 0}(1510). The {ital f}{sub 0}(975) is dominantly {ital s{bar s}} mixed with {ital K{bar K}} virtual states while the {ital f}{sub 0}(1510) might be ({ital u{bar u}}+{ital d{bar d}}) mixed with {rho}{rho}-{omega}{omega} virtual states and/or a glueball state. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 165535
- Report Number(s):
- CONF-940514--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 338; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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