# ${{\boldsymbol \gamma}}$ ENERGY IN ${{\boldsymbol \Upsilon}{(2S)}}$ DECAY INSPIRE search

VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ 162.5 \pm0.4}$ OUR AVERAGE
$162.56$ $\pm0.19$ $\pm0.42$
 2005
CLEO ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit X}}$
$162.0$ $\pm0.8$ $\pm1.2$
 1999
CLE2 ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}{(1P)}}$
$162.1$ $\pm0.5$ $\pm1.4$
 1985 E
ARG ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ conv. ${{\mathit \gamma}}$ X
$163.8$ $\pm1.6$ $\pm2.7$
 1985
CBAL ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}$ X
$158.0$ $\pm7$ $\pm1$
 1984
CLEO ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ conv. ${{\mathit \gamma}}$ X
• • • We do not use the following data for averages, fits, limits, etc. • • •
$149.4$ $\pm0.7$ $\pm5.0$
 1983
CUSB ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}$ X
References:
 ARTUSO 2005
PRL 94 032001 Photon Transitions in ${{\mathit \Upsilon}{(2S)}}$ and ${{\mathit \Upsilon}{(3S)}}$ Decays
 EDWARDS 1999
PR D59 032003 Measurement of the Mass Splittings between the ${\mathit {\mathit b}}{\mathit {\overline{\mathit b}}}{{\mathit \chi}_{{b,J}}{(1P)}}$ States
 ALBRECHT 1985E
PL 160B 331 Radiative Decays of the ${{\mathit \Upsilon}{(2S)}}$ into the Three ${{\mathit \chi}_{{b}}}$ States
 NERNST 1985
PRL 54 2195 Observation of Three ${{\mathit p}}$ States in the Radiative Decay of ${{\mathit \Upsilon}{(2S)}}$
 HAAS 1984
PRL 52 799 Observation of Radiative Decays of the ${{\mathit \Upsilon}{(2S)}}$
 KLOPFENSTEIN 1983
PRL 51 160 Observation of the Lowest ${\mathit P}{\mathrm -wave}$ ${{\mathit b}}{{\overline{\mathit b}}}$ Bound States