p-p INTERACTIONS AT 2 Bev. II. MULTIPLE-PION PRODUCTION

Journal Article · Thu Mar 15 04:00:00 EST 1962 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

OSTI ID:4793209

Pickup, E; Robinson, D K; Salant, E O

Analyses were made for 871 four-prong events and 463 two-prong events corresponding to multiple pion production, resulting from p-p interactions at 2 Bev in the BNL 20-in. hydrogen bubble chamber. Cross sections were obtained for all the observable double and triple pion production processes; the branching ratios predicted by the extended isobar model are in fair agreement with the data, but there are differences. The c.m. momentum distributions are also in fair agreement with the predictions of the model, although there are ambiguities in the interpretation. The pion-nucleon Q values give evidence for the importance of the (3/2, 3/2) resonant state in multiple pion production, but consideration of this state alone does not provide an explanation of the features of double pion production. Some contribution from another state, possibly the I = 1/2 nucleon isobar, is necessary. In double production, the c.m. angular distributions of the nucleons show backward-forward peaking suggestive of a one- pion exchange process. The angular distributions of the nucleons from triple production are almost isotropic. (auth)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• NSA Number: NSA-16-015571
• OSTI ID: 4793209
• Report Number(s): BNL-5739; 0031-899X
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 125; ISSN PHRVA
• Country of Publication: United States
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
BRANCHING RATIO
BUBBLE CHAMBERS
CROSS SECTIONS
DECAY
DISTRIBUTION
ENERGY
ENERGY RANGE
GEV RANGE
HYDROGEN
INTERACTIONS
ISOBARIC MODEL
MOMENTUM
NUCLEONS
OPE MODEL
PARTICLE MODELS
PARTICLE TRACKS
PHYSICS
PIONS
PRODUCTION
PROTONS
Q-VALUE
RESONANCE