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${\mathit m}_{{{\mathit \chi}_{{b1}}{(2P)}}}–{\mathit m}_{{{\mathit \chi}_{{b0}}{(2P)}}}$

INSPIRE   PDGID:

M080M2

VALUE (MeV) DOCUMENT ID TECN  COMMENT $23.5$ $\pm0.7$ $\pm0.7$ 1 HEINTZ 1992 CSB2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}$ X, ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}{{\mathit \gamma}}{{\mathit \gamma}}$ 1  From the average photon energy for inclusive and exclusive events. Supersedes NARAIN 1991 .

References:

HEINTZ 1992 PR D46 1928 ${\mathit {\mathit b}}{\mathit {\overline{\mathit b}}}$ Spectroscopy from the ${{\mathit \Upsilon}{(3S)}}$ State