Mass and width of {sigma}(750) scalar meson from measurements of {pi}{sup -}p{yields}{pi}{sup -}{pi}{sup +}n on polarized target
Journal Article
·
· AIP Conference Proceedings
- Department of Physics, McGill University, Montreal, PQ, H3A 2T8 (Canada)
Model independent amplitude analyses of {pi}{sup -}p{sub {up_arrow}}{yields}{pi}{sup -}{pi}{sup +}n on polarized target at 17.2 GeV/c reveal resonant structure of S-wave transversity amplitudes |S-bar|{sup 2}{sigma} and |S|{sup 2}{sigma} near 750 MeV. Simultaneous fit to |S-bar|{sup 2}{sigma} and |S|{sup 2}{sigma} with a single {sigma} pole yields m{sub {sigma}}=775{+-}17 MeV and {gamma}{sub {sigma}}=147{+-}33 MeV. Simultaneous fit with two common {sigma} poles yields a lower {chi}{sup 2}/dpt. Their resonance parameters are m{sub {sigma}}=786{+-}24 MeV, {gamma}{sub {sigma}}=130{+-}47 MeV and m{sub {sigma}{sup '}}=670{+-}30 MeV, {gamma}{sub {sigma}{sup '}}=59{+-}58 MeV.
- OSTI ID:
- 21185759
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 432; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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