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${\mathit m}_{{{\mathit \chi}_{{b1}}{(1P)}}}–{\mathit m}_{{{\mathit \chi}_{{b0}}{(1P)}}}$

INSPIRE   PDGID:

M076M2

VALUE (MeV) DOCUMENT ID TECN  COMMENT $32.49$ $\pm0.93$ LEES 2014 M BABR ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$

References:

LEES 2014M PR D90 112010 Bottomonium Spectroscopy and Radiative Transitions Involving the ${{\mathit \chi}_{{bJ}}{(1P,2P)}}$ States at BABAR