Phi meson and accompanying strange particle production in 16 GeV/c. pi. /sup +/p interactions
We have studied phi production in 16 GeV/c ..pi../sup +/p interactions. K/sup -/ identified in a Cerenkov counter were used to trigger the Stanford Linear Accelerator Center 2-meter streamer chamber. A sample of inclusive phi events was thus obtained where phi ..-->.. K/sup -/K/sup +/. Information from a second Cerenkov counter was used to identify the K/sup +/ off-line. In addition, the visible decays in the streamer chamber of ..lambda../sup 0/ ..-->.. p..pi../sup -/ and K/sub s//sup 0/ ..-->.. ..pi../sup +/..pi../sup -/ were used to obtain events of the type ..pi../sup +/p ..-->.. phi ..lambda../sup 0/ + anything and ..pi../sup +/p ..-->.. phi K/sub s//sup 0/ + anything. With 1.26 x 10/sup 9/ ..pi../sup +/ onto a 61 cm liquid hydrogen target, the experiment had a raw sensitivity of 3.1 events/nb. For the film measured so far, taking into account geometric acceptance, unseen decay modes, and all efficiency corrections, the sensitivities are 7.1 events/..mu..b, 22 events/..mu..b, and 27 events/..mu..b respectively, for the phi inclusive, phi with ..lambda../sup 0/, and phi with K/sub s//sup 0/ samples. The acceptance covers the region in Feynman's x, x/sub phi/ > 0.5. The measured cross sections for x/sub phi/ > 0.5 are sigma(phi + X) = 1.3 +- 2.0 ..mu..b, sigma(phi ..lambda../sup 0/ + X) = 0.37 +- 0.16 ..mu..b, and sigma(phi K/sub s//sup 0/ + X) = 0.33 +- 0.15 ..mu..b. When account is taken of unseen associated channels, it is concluded that phi is predominantly produced conjointly with pairs of strange particles. This agrees with the OZI rule, and is consistent with phi being produced by a quark fusion type process, rather than gluon fusion or light quark annihilation.
- Research Organization:
- Michigan State Univ., East Lansing (USA)
- OSTI ID:
- 6210948
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PHI-1019 RESONANCES
PARTICLE PRODUCTION
PION PLUS-PROTON INTERACTIONS
CROSS SECTIONS
EXPERIMENTAL DATA
GEV RANGE 10-100
KAONS
PARTICLE DECAY
PIONS
STANFORD 20-GEV LINAC
STRANGE PARTICLES
ACCELERATORS
BOSONS
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
GEV RANGE
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
LINEAR ACCELERATORS
MESON RESONANCES
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
VECTOR MESONS
645104* - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Meson-Induced Interactions- (-1987)