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SINGLE PION PRODUCTION IN 0.96-Bev $pi$ to the minus -p INTERACTIONS

Journal Article · · Phys. Rev. Letters
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ABS>Photographs of interactions in a hydrogen bubble chamber irradiated by 0.96-Bev pi /sup -/ were analyzed. Measurements revealed 415 events of the reaction pi /sup -/ + p yields n + pi /sup +/ + pi /sup -/ and 267 events of the reaction pi /sup -/+ p yields p + pi /sup o/ + pi /sup -/. It is shown that the angular distributions are quite different and the observed ratio of proton to neutron events with fast pi /sup -/ is 0.9 plus or minus 0.2. Q values for the different nucleon-pion combinations were computed from the observed momenta. The distributions of Q values are plotted for pion-pion combinations in each reaction, with backward-nucleon events and forward-nucleon events plotted separately. No evidence is seen of pcaking for ( pi /sup -/ pi / sup +/), either for forward or backward neutrons or for ( pi /sup -/ pi /sup o/) forward protons. The Q distribution of ( pi /sup -/ pi /sup o/) for backward protons shows a distinct peak at about 325-Mev, which is suggestive of a 600Mev resonant di-pion'' state (T = 1 or 2). This event is being analyzed. (B.O.G.)
Research Organization:
National Research Lab., Ottawa
NSA Number:
NSA-14-024806
OSTI ID:
4136937
Journal Information:
Phys. Rev. Letters, Journal Name: Phys. Rev. Letters Vol. Vol: 5
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

ANGULAR DISTRIBUTION
BUBBLE CHAMBERS
DIAGRAMS
ENERGY
ENERGY LEVELS
HYDROGEN
INTERACTIONS
MEV RANGE
NEUTRONS
PARTICLE TRACKS
PHOTOGRAPHY
PHYSICS
PIONS
PIONS-MINUS
PIONS-NEUTRAL
PIONS-PLUS
PRODUCTION
PROTONS
Q-VALUE
RESONANCE