Accession Number : AD0665851

Title :   PHOTOPRODUCED AND ELECTROPRODUCED MUON PAIRS.

Descriptive Note : Physical sciences research papers no. 348,

Corporate Author : ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA PA

Personal Author(s) : Rothwell,Paul L.

Report Date : DEC 1967

Pagination or Media Count : 91

Abstract : Part I: Photoproduced muon pairs were measured between 470 MeV and 1070 MeV in invariant mass. The results, after suitable corrections, were compared with the predictions of Quantum Electrodynamics. A value of (0.74 plus or minus 0.20) x 10 to the -4th power was obtained for the rho branching ratio into muon pairs compared with pion pairs. Upper limits of 0.26 and 0.12 were obtained for the omega and phi decay into muon pairs compared to the rho. Part II: The differential cross section for electroproduced (elastic) muon pairs were calculated including the crossterms between the space-like and time-like diagrams. The cross sections were evaluated for regions where either the space-like or time-like terms dominate. The muon-produced electron pair cross sections were also considered. Integration was performed over the final electron for muon pairs and the final muon for electron pairs. A region is shown to exist, consistent with Yamamoto's work, where the time-like case dominates. Counting rates are given for the apparatus of Part I for a carbon target and including form factor effects. Finally, zero mass, small angle approximations are derived for the differential cross sections for equal pair energies. (Author)

Descriptors :   (*MUONS, *PAIR PRODUCTION), PHOTONUCLEAR REACTIONS, DIFFERENTIAL CROSS SECTIONS, MESON REACTIONS, CHARGED PARTICLES, NUCLEAR MODELS, CARBON, INVARIANCE

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE