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${\boldsymbol {\boldsymbol b}}$ ${\boldsymbol {\overline{\boldsymbol b}}}$ MESONS
(including possibly non- ${\boldsymbol {\boldsymbol q}}$ ${\boldsymbol {\overline{\boldsymbol q}}}$ states)

${{\boldsymbol \chi}_{{b1}}{(2P)}}$ $I^G(J^{PC})$ = $0^+(1^{+ +})$ J need confirmation.

Observed in radiative decay of the ${{\mathit \Upsilon}{(3S)}}$, therefore ${}^{C} = +$. Branching ratio requires E1 transition, M1 is strongly disfavored, therefore ${}^{P} = +$.

${{\mathit \chi}_{{b1}}{(2P)}}$ MASS

$10255.46 \pm0.22 \pm0.50$ MeV

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

$23.5 \pm1.0$ MeV

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

$99.26 \pm0.22$ MeV

B( ${{\mathit \chi}_{{b1}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$ ) ${\times }$ B( ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{b1}}{(2P)}}$ ) ${\times }$ B( ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ )

$(2.9 \pm0.4) \times 10^{-4}$ (S = 1.9)

B( ${{\mathit \chi}_{{b1}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(2S)}}$ ) ${\times }$ B( ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{b1}}{(2P)}}$ ) ${\times }$ B( ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ )

$(3.8 \pm0.6) \times 10^{-4}$ (S = 1.8)

B( ${{\mathit \chi}_{{b1}}{(2P)}}$ $\rightarrow$ ${{\mathit \chi}_{{b1}}{(1P)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ ) ${\times }$ B( ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \chi}_{{b1}}{(2P)}}{{\mathit X}}$ )

$0.00116 \pm0.00014$

B( ${{\mathit \chi}_{{b2}}{(2P)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit X}}{+}$ ${{\overline{\mathit p}}}{{\mathit X}}$ )/B( ${{\mathit \chi}_{{b1}}{(2P)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit X}}{+}$ ${{\overline{\mathit p}}}{{\mathit X}}$ )

B( ${{\mathit \chi}_{{b0}}{(2P)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit X}}{+}$ ${{\overline{\mathit p}}}{{\mathit X}}$ )/B( ${{\mathit \chi}_{{b1}}{(2P)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit X}}{+}$ ${{\overline{\mathit p}}}{{\mathit X}}$ )

Decay Modes

${{\mathit \omega}}{{\mathit \Upsilon}{(1S)}}$

$(1.63^{+0.40}_{-0.34})\%$

${{\mathit \gamma}}{{\mathit \Upsilon}{(2S)}}$

$(18.1\pm{1.9})\%$

${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$

$(9.9\pm{1.0})\%$

${{\mathit \pi}}{{\mathit \pi}}{{\mathit \chi}_{{b1}}{(1P)}}$

$(9.1\pm{1.3})\times 10^{-3}$

${{\mathit D}^{0}}{{\mathit X}}$

$(8.8\pm{1.7})\%$

${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$

$(3.1\pm{1.0})\times 10^{-4}$

2 ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{-}}{{\mathit K}_S^0}$

$(1.1\pm{0.5})\times 10^{-4}$

2 ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{-}}{{\mathit K}_S^0}$ 2 ${{\mathit \pi}^{0}}$

$(7.7\pm{3.2})\times 10^{-4}$

2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$

$(5.9\pm{2.0})\times 10^{-4}$

2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$

$(10\pm{4})\times 10^{-5}$

2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$

$(5.5\pm{1.8})\times 10^{-4}$

2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$2 ${{\mathit \pi}^{0}}$

$(10\pm{4})\times 10^{-4}$

3 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{-}}{{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$

$(6.7\pm{2.6})\times 10^{-4}$

3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}$

$(1.2\pm{0.4})\times 10^{-4}$

3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$

$(1.2\pm{0.4})\times 10^{-3}$

3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$

$(2.0\pm{0.8})\times 10^{-4}$

3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$

$(6.1\pm{2.2})\times 10^{-4}$

4 ${{\mathit \pi}^{+}}$4 ${{\mathit \pi}^{-}}$

$(1.7\pm{0.6})\times 10^{-4}$

4 ${{\mathit \pi}^{+}}$4 ${{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$

$(1.9\pm{0.7})\times 10^{-3}$