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${{\mathit \gamma}}$ 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:

ARTUSO 2005 PRL 94 032001 Photon Transitions in ${{\mathit \Upsilon}{(2S)}}$ and ${{\mathit \Upsilon}{(3S)}}$ Decays HEINTZ 1992 PR D46 1928 ${\mathit {\mathit b}}{\mathit {\overline{\mathit b}}}$ Spectroscopy from the ${{\mathit \Upsilon}{(3S)}}$ State MORRISON 1991 PRL 67 1696 Inclusive ${{\mathit \chi}{(2P)}}$ Production in ${{\mathit \Upsilon}{(3S)}}$ Decay