抄録
We set up a general framework to describe ππ scattering below 1 GeV based on chiral low-energy expansion with possible spin-0 and -1 resonances. Partial wave amplitudes are obtained with the N/D method, which satisfy unitarity, analyticity, and approximate crossing symmetry. A comparison with the phase shift data in the J=0 channel favors a scalar resonance near the ρ mass.
| 本文言語 | English |
|---|---|
| 論文番号 | 034005 |
| ページ（範囲） | 1-9 |
| ページ数 | 9 |
| ジャーナル | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| 巻 | 59 |
| 号 | 3 |
| 出版ステータス | Published - 1999 2月 1 |
ASJC Scopus subject areas
- 物理学および天文学（その他）