Inclusive particle production at forward angles from collisions of light relativistic nuclei: Negative pions
We have measured single particle inclusive spectra of negative pions produced at angles from 0/sup 0/ to 12/sup 0/ (lab) in collisions of 1.05 and 2.1 GeV/nucleon protons, deuterons, alpha particles, and carbon nuclei with targets of C, Cu, Pb, and H (from a CH/sub 2/-C subtraction). Most of the pions are produced in the kinematical domains allowed in free nucleon-nucleon collisions, but for alpha and carbon projectiles we have also observed pions whose energies range up to nearly twice the kinetic energy of a nucleon in the projectile. Our results suggest that processes involving more than two colliding nucleons and/or high internal momentum components are involved in the production of these high energy pions. Comparison is made with several hypotheses of scaling including specific dynamical models, and some disagreement is observed. We present fits to the kinetic energy dependence of the data, and the target and projectile mass dependence. We also show transverse momentum distributions.
- Research Organization:
- Lawrence Berkeley Laboratory and Department of Physics, University of California, Berkeley, California 94720
- OSTI ID:
- 5594720
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 28:3; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR DISTRIBUTION
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
BOSONS
CARBON
CHARGED-PARTICLE REACTIONS
COPPER
CROSS SECTIONS
DEUTERON REACTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FRAGMENTATION
GEV RANGE
GEV RANGE 01-10
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYDROGEN
INCLUSIVE INTERACTIONS
INTERACTIONS
LEAD
LINEAR MOMENTUM
MESONS
METALS
NONMETALS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PIONS
PIONS MINUS
PROTON REACTIONS
PSEUDOSCALAR MESONS
TRANSITION ELEMENTS
TRANSVERSE MOMENTUM