Anomalous e/sup +/ e/sup -/ pair production in 17 GeV/c. pi. -p collisions

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1981

OSTI ID:5302962

Stekas, J C

This dissertation reports the results of an experiment which measured inclusive e/sup +/e/sup -/ pair production in 17 GeV/c ..pi../sup -/p interactions. The experiment was conducted at the Multiparticle Spectrometer facility at Brookhaven National Laboratory. Electron identification was provided by two transition radiation detectors and lead-scintillator shower detectors. Pairs with X/sub F/ > .3 were visible for all P/sub perpendicular/ and their masses, and associated particles produced in the interaction were observable over nearly 4 ..pi.. solid angle. We have observed electron pairs with masses up to 1.5 GeV with little hadron contamination. A clear signal of rho/sup 0/ ..omega.. ..-->.. e/sup +/e/sup -/ is seen. Below the rho/sup 0//..omega.. mass region and excess of events over those expected from eta ..-->.. ..gamma..e/sup +/e/sup -/ and ..omega.. ..-->.. ..pi../sup 0/e/sup +/e/sup -/ sources is observed. This anomalous electron pair signal is sharply peaked at low X/sub F/.

• Research Organization: State Univ. of New York, Stony Brook (USA)
• OSTI ID: 5302962
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BROOKHAVEN AGS
CYCLIC ACCELERATORS
ELECTRON PAIRS
ENERGY RANGE
GEV RANGE
GEV RANGE 10-100
HADRON-HADRON INTERACTIONS
INCLUSIVE INTERACTIONS
INTERACTIONS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
PAIR PRODUCTION
PARTICLE INTERACTIONS
PION MINUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
SYNCHROTRONS