Angular distributions of pion-proton bremsstrahlung at 298 MeV

We report new measurements of ..pi../sup plus-or-minus/p ..-->.. ..pi../sup plus-or-minus/p..gamma.. at 18 photon angles for 298-MeV incident pions. At all angles, the photon spectrum falls monotonically with increasing E/sub gamma/, and lacks the predicted structure due to the ..delta.. (1232) r...

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Veröffentlicht in:	Phys. Rev., D; (United States) D; (United States), 1976-08, Vol.14 (3), p.698-701
Hauptverfasser:	Leung, K. C., Arman, M., Ballagh, H. C., Glodis, P. F., Haddock, R. P., Nefkens, B. M. K., Sober, D. I.
Format:	Artikel
Sprache:	eng
Schlagworte:	645103 - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Interactions & Baryon & Meson Properties 645104 - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Meson-Induced Interactions- (-1987) ANGULAR DISTRIBUTION BARYON RESONANCES BARYONS BOSONS BREMSSTRAHLUNG DELTA-1236 RESONANCES DISTRIBUTION ELECTROMAGNETIC RADIATION ELEMENTARY PARTICLES ENERGY RANGE FERMIONS HADRON-HADRON INTERACTIONS HADRONS INTERACTIONS MESON-BARYON INTERACTIONS MESON-NUCLEON INTERACTIONS MESONS MEV RANGE MEV RANGE 100-1000 N)RESONANCES PARTICLE INTERACTIONS PARTICLE PRODUCTION PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PION MINUS-PROTON INTERACTIONS PION PLUS-PROTON INTERACTIONS PION-NUCLEON INTERACTIONS PION-PROTON INTERACTIONS PIONS PIONS MINUS PIONS PLUS PSEUDOSCALAR MESONS RADIATIONS RESONANCE PARTICLES
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Zusammenfassung:	We report new measurements of ..pi../sup plus-or-minus/p ..-->.. ..pi../sup plus-or-minus/p..gamma.. at 18 photon angles for 298-MeV incident pions. At all angles, the photon spectrum falls monotonically with increasing E/sub gamma/, and lacks the predicted structure due to the ..delta.. (1232) resonance. The soft-photon approximation agrees with the data for E/sub gamma/ < 50 MeV only. For higher E/sub gamma/, the simple external-emission-dominance calculation provides an acceptable but imperfect description of all of results. (AIP)
ISSN:	0556-2821
DOI:	10.1103/PhysRevD.14.698