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

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$609.3$ ${}^{+4.6}_{-4.5}$ $\pm1.9$ $13$ $\pm5$k 1
 2009 AQ
BABR ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit X}}$
1  Assuming ${\Gamma}_{{\mathit \eta}_{{b}}{(1S)}}$ = 10 MeV. Not independent of the corresponding mass or mass difference measurements.
References:
 AUBERT 2009AQ
PRL 103 161801 Evidence for the ${{\mathit \eta}_{{b}}{(1S)}}$ Meson in Radiative ${{\mathit \Upsilon}{(2S)}}$ Decay