Total Width and Leptonic Branching Ratio of the $\Upsilon$ (9.46)

With use of the LENA detector at the DORIS e+e− storage ring, the hadronic cross section and the μ-pair decay branching ratio of the ϒ(9.46) resonance have been measured. Γee=1.23±0.10 (±0.14) keV, Bμμ=[3.5±1.4 (±0.4)]%, and Γtot=35−10+25 ({+9}{−7}) keV have been obtained. The first set of errors gives the statistical uncertainty. The numbers in parentheses represent systematic errors arising from the uncertainty in the total hadronic cross section.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
HADRON: ELECTROPRODUCTION
ELECTROPRODUCTION: HADRON
TOTAL CROSS SECTION: HADRONIC
HADRONIC: TOTAL CROSS SECTION
UPSILON(9500): ELECTROPRODUCTION
ELECTROPRODUCTION: UPSILON(9500)

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Total Width and Leptonic Branching Ratio of the Υ\UpsilonΥ (9.46)

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Total Width and Leptonic Branching Ratio of the $\Upsilon$ (9.46)