pdgLive

${{\mathit \Upsilon}{(4S)}}$ WIDTH

VALUE (MeV)

DOCUMENT ID

TECN

COMMENT

$\bf{ 20.5 \pm2.5}$

OUR AVERAGE

$20.7$ $\pm1.6$ $\pm2.5$

BABR

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons

$20$ $\pm2$ $\pm4$

CLEO

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons

• • We do not use the following data for averages, fits, limits, etc. • •

$25$ $\pm2.5$

CUSB

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons

References:

PR D72 032005

Measurement of the Total Width, the Electronic Width, and the Mass of the ${{\mathit \Upsilon}{(10580)}}$ Resonance

PRL 54 381

Observation of New Structure in the ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Cross Section above the ${{\mathit \Upsilon}{(4S)}}$

PRL 54 377

Masses, Widths and Leptonic Widths of the Higher ${{\mathit \Upsilon}}$ Resonances

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