| Autor: |
L. D. Roper, Richard A. Arndt, V. S. Zidell |
| Rok vydání: |
1980 |
| Předmět: |
|
| Zdroj: |
Physical Review D. 21:1255-1288 |
| ISSN: |
0556-2821 |
| DOI: |
10.1103/physrevd.21.1255 |
| Popis: |
Energy-dependent and energy-independent partial-wave analyses of the low-energy ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}p$ elastic and charge-exchange scattering data are presented. Unique, unitary, energy-dependent solutions giving a $\frac{{\ensuremath{\chi}}^{2}}{\mathrm{datum}}$ of 1 are obtained. The solutions exhibit charge splitting in both the ${S}_{31}$ and ${P}_{33}$ partial waves. The $T$-matrix pole positions and residues of the ${\ensuremath{\Delta}}^{++}$ and ${\ensuremath{\Delta}}^{0}$ resonances are determined to a new precision. $D$ and $F$ waves are well determined independent of theoretical constraints. New values for the $S$- and $P$-wave scattering lengths and effective ranges are reported. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
