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${\mathit m}_{{{\mathit \chi}_{{b2}}{(2P)}}}–{\mathit m}_{{{\mathit \chi}_{{b1}}{(2P)}}}$

INSPIRE   PDGID:

M081M2

VALUE (MeV) DOCUMENT ID TECN  COMMENT $\bf{ 13.10 \pm0.24}$ OUR AVERAGE $12.3$ $\pm2.6$ $\pm0.6$ 1 AAIJ 2014 BG LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{{\mathit X}}$ $13.04$ $\pm0.26$ LEES 2014 M BABR ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ $13.5$ $\pm0.4$ $\pm0.5$ 2 HEINTZ 1992 CSB2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}$ X, ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}{{\mathit \gamma}}{{\mathit \gamma}}$ 1  From the ${{\mathit \chi}_{{bj}}{(2P)}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S)}}{{\mathit \gamma}}$ transition. 2  From the average photon energy for inclusive and exclusive events. Supersedes NARAIN 1991 .

References:

AAIJ 2014BG JHEP 1410 088 Measurement of the ${{\mathit \chi}_{{b}}{(3P)}}$ Mass and of the Relative Rate of ${{\mathit \chi}_{{b1}}{(1P)}}$ and ${{\mathit \chi}_{{b2}}{(1P)}}$ Production LEES 2014M PR D90 112010 Bottomonium Spectroscopy and Radiative Transitions Involving the ${{\mathit \chi}_{{bJ}}{(1P,2P)}}$ States at BABAR HEINTZ 1992 PR D46 1928 ${\mathit {\mathit b}}{\mathit {\overline{\mathit b}}}$ Spectroscopy from the ${{\mathit \Upsilon}{(3S)}}$ State