On the determination of {sigma} from experimental data on the {pi}{pi} isoscalar S-wave at low energies
Journal Article
·
· AIP Conference Proceedings
- National Institute of Physics and Nuclear Engineering POB MG 6, Bucharest, R-077125 (Romania)
We investigate the determination of the pole associated to {sigma} from {pi}{pi} scattering data below the KK-bar threshold, including the new precise data from K{sub e4} decay reported recently by the NA48/2 Collaboration. Using a large class of analytic parametrizations based on expansions in powers of conformal variables, we obtain for the mass and width of {sigma} values which are consistent with those calculated recently using ChPT and Roy equations, but have larger theoretical uncertainties.
- OSTI ID:
- 21149171
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1030; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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