${{\mathit \gamma}}$ ENERGY IN ${{\mathit \Upsilon}{(3S)}}$ DECAY

INSPIRE   PDGID:
M079DM
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 121.9 \pm0.4}$ OUR EVALUATION  Treating systematic errors as correlated  See the ideogram below.
$\bf{ 122.2 \pm0.5}$ OUR AVERAGE  Error includes scale factor of 1.4.  See the ideogram below.
$121.55$ $\pm0.16$ $\pm0.46$
ARTUSO
2005
CLEO ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit X}}$
$123.0$ $\pm0.8$ 4959 1
HEINTZ
1992
CSB2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}$ X
$124.6$ $\pm1.4$ 17 2
HEINTZ
1992
CSB2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}{{\mathit \gamma}}{{\mathit \gamma}}$
$122.3$ $\pm0.3$ $\pm0.6$ 9903
MORRISON
1991
CLE2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}$ X
1  A systematic uncertainty on the energy scale of 0.9$\%$ not included. Supersedes NARAIN 1991.
2  A systematic uncertainty on the energy scale of 0.9$\%$ not included. Supersedes HEINTZ 1991.

           ${{\mathit \gamma}}$ energy in ${{\mathit \Upsilon}{(3S)}}$ decay (MeV)
References