Isospin breaking in low-energy pion-nucleon scattering

Isospin breaking in low-energy pion-nucleon scattering

We have analyzed low-energy pion-nucleon data for isospin invariance by comparing charge-exchange amplitudes derived from charge-exchange data with those predicted from recent {pi}{sup {plus_minus}}{ital p} elastic data through the application of isospin invariance. A discrepancy of the order of 7%...

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Veröffentlicht in:Physical Review Letters 1995-05, Vol.74 (19), p.3740-3743
Hauptverfasser: Gibbs, WR, Ai, L, Kaufmann, WB
Format: Artikel
Sprache:eng
Schlagworte:
AMPLITUDES
CHARGE-EXCHANGE REACTIONS
COULOMB SCATTERING
ELASTIC SCATTERING
ISOSPIN
MASS DIFFERENCE
P WAVES
PHYSICS
PION-NUCLEON INTERACTIONS
SPIN FLIP
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Zusammenfassung:We have analyzed low-energy pion-nucleon data for isospin invariance by comparing charge-exchange amplitudes derived from charge-exchange data with those predicted from recent {pi}{sup {plus_minus}}{ital p} elastic data through the application of isospin invariance. A discrepancy of the order of 7% is observed beyond the contributions of the {pi}{sup {plus_minus}}{ital p} Coulomb interaction and the hadronic mass differences.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.74.3740