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YIELDS OF K$sup +$ AND K$sup -$ MESONS PRODUCED BY 1.7-TO 3-Bev PROTONS

Journal Article · · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
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Nuclear emulsions were used to measure yields of K/sup +/ and K/sup -/ mesons produced in Be (and Pb) nuclei by Cosmotron protons of various energies, ranging from 1.7 Bev to 2.95 Bev. The experimental equipment accepted particles emitted in the forward direction with momenta of about 300 Mev/c. At 2.95 Bev, the K/sup +/ yield from Be corresponds to a differential cross section per nucleus of (4.0 plus or minus 0.5) x 10/sup -31/ cm/sup 2/(Mev/c)/sup -1/ sterad/sup -1/; the K/sup -/ cross section is 26 times smaller. The K/sup +/ cross section of Pb is larger than that of Be by a factor approximately equal to the ratio of the geometric cross sections of these nuclei. With decreasing proton energy, the K/sup -/ yield falls more rapidly than the K/sup +/ yield. The energy dependence of the yields was compared with curves which were computed, on the assumption of constant matrix elements, from the phase-space factors of production reactions required by the principle of conservation of strangeness. For K/sup -/, the results of these calculations agree with the experimental data; for K/sup +/, the yield falls more rapidly with decreasing primary energy than expected from the computations. (auth)
Research Organization:
Brookhaven National Lab., Upton, N.Y.
NSA Number:
NSA-13-008067
OSTI ID:
4272641
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Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 112; ISSN PHRVA
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

ANGULAR DISTRIBUTION
BERYLLIUM
COSMOTRONS
CROSS SECTIONS
EFFICIENCY
EMISSION
ENERGY
ENERGY RANGE
ERRORS
KAONS
KAONS- PLUS
KAONS-MINUS
LEAD
MATRICES
MEASURED VALUES
NUCLEAR EMULSIONS
NUCLEAR MODELS
NUCLEAR STRUCTURE
NUCLEI
NUMERICALS
PARTICLE MODELS
PHYSICS AND MATHEMATICS
PRODUCTION
PROTONS
STRANGENESS
SYNCHROTRONS