A study of e[sup +]e[sup [minus]] [yields] [pi][sup +][pi][sup [minus]][pi][sup 0][pi][sup 0] at 3. 090 GeV center of mass energy

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1993

OSTI ID:7264201

McGowan, III, J F

The process e[sup +]e[sup [minus]] [yields] [pi][sup +][pi][sup [minus]][pi][sup 0][pi][sup 0] is studied at a center of mass energy of 3.090 GeV, the J/[psi] center of mass energy, by the Mark III detector at SPEAR. The branching ratios for [psi] [yields] [pi][sup +][pi][sup [minus]][pi][sup 0][pi][sup 0], and several background processes are measured: [psi] [yields][pi][sup +][pi][sup [minus]][pi][sup 0][pi][sup 0][pi][sup 0], [psi] [yields] K[sup [+-]]K[sup [-+]][pi][sup 0][pi][sup 0], and [psi] [yields] K[sup [+-]][pi][sup [-+]][pi][sup 0][pi][sup 0]. Upper limits on e[sup +]e[sup [minus]] [yields] [rho][sup +] [rho][sup [minus]] are derived. Evidence is presented that the isobar model of low-energy hadronic interactions may not apply to e[sup +]e[sup [minus]] [yields] [pi][sup +][pi][sup [minus]][pi][sup 0][pi][sup 0]. Suggestions for further research are made.

• Research Organization: Illinois Univ., Urbana, IL (United States)
• OSTI ID: 7264201
• Country of Publication: United States
• Language: English

Related Subjects

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BRANCHING RATIO
CHARMONIUM
DATA
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 01-10
HADRONS
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PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
PSEUDOSCALAR MESONS
QUARKONIUM
SPEAR
STORAGE RINGS
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