Dimuon production in 15. 5-GeV/c. pi. p interactions and the observation of a low-mass continuum

Journal Article · Sat Nov 01 04:00:00 EST 1980 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.22.2107· OSTI ID:7095088

Haber, B; Kogan, E; Bunnell, K; Duong-van, M; Mozley, R; Odian, A; Villa, F; Wang, L; Cassell, R; Panvini, n; Poucher, S; Stone, S; Schalk, T; Barber, W C

We report the results of an experiment which examines the entire final state of events in which muon pairs were produced in 15.5-GeV/c ..pi../sup + -/p interactions. A portion of this data was presented earlier. Here we report on the final data sample of 890 events obtained from a total of 2.5 x 10/sup 8/ interactions (a sensitivity of (8.65 events/nb) x trigger efficiency). The experiment was sensitive primarily to the low-mass region and the good mass resolution made it possible to identify the contributions from the rho and ..omega.. decays and the eta and ..omega.. Dalitz decays. An excess of events is observed in the dimuon mass region approx.400 -- 600 MeV which is not accounted for by the above-mentioned decays. The final states were examined to search for characteristic differences from those in events without dimuons.

• Research Organization: sectiontanford Linear Accelerator Center, Stanford University, Stanford, California 94305
• OSTI ID: 7095088
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 22:9; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645104* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BEAMS
ENERGY RANGE
GAS TRACK DETECTORS
GEV RANGE
GEV RANGE 10-100
HADRON-HADRON INTERACTIONS
INTERACTIONS
LINEAR MOMENTUM
MEASURING INSTRUMENTS
MESON BEAMS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MUON PAIRS
PAIR PRODUCTION
PARTICLE BEAMS
PARTICLE INTERACTIONS
PION BEAMS
PION MINUS-PROTON INTERACTIONS
PION PLUS-PROTON INTERACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
RADIATION DETECTORS
SCINTILLATION COUNTERS
SPARK CHAMBERS
STREAMER SPARK CHAMBERS
TRANSVERSE MOMENTUM