Total Cross-section for Hadron Production by $e^+ e^-$ Annihilation Between 9.4-{GeV} and 9.5-{GeV} - INSPIRE

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Total Cross-section for Hadron Production by $e^+ e^-$ Annihilation Between 9.4-{GeV} and 9.5-{GeV}

DESY-Hamburg-Heidelberg-Munich

Collaboration

•

P. Bock
(
- Heidelberg U.
)

Jun, 1980

11 pages

Published in:

Z.Phys.C 6 (1980) 125

DOI:

10.1007/BF01588838

PDG:

{{\mathit \Upsilon}{(1S)}}

\rightarrow

{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}

Report number:

DESY-80-58

Experiments:

DESY-147

View in:

KEK scanned document

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reference search62 citations

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Abstract: (Springer)

The total cross section fore+e− annihilation into hadrons for center of mass energies from 9.4 to 9.5 GeV has been measured with the nonmagnetic DESY-Heidelberg detector at DORIS. A value ofR=σhad/σµµ=3.8±0.7 for the continuum region around the Υ (9.46) resonance has been determined. The ratioΓeeΓhad/Γtot of electronic, hadronic and total widths has been reevaluated to be (1.00±0.23) keV for the Υ resonance and (0.37±0.16) keV for the Υ′. In addition, a search for directly produced pohotons from Υ decays of the type Υ→γ+gluon+gluon has been performed. The Υ decay into muon pairs has also been searched for.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
UPSILON(9500): ELECTROPRODUCTION
ELECTROPRODUCTION: UPSILON(9500)
TOTAL CROSS SECTION: ENERGY DEPENDENCE
ENERGY DEPENDENCE: TOTAL CROSS SECTION
TOTAL CROSS SECTION: RATIO
RATIO: TOTAL CROSS SECTION

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