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

INSPIRE   JSON PDGID: M081

${{\mathit \chi}_{{{b2}}}{(2P)}}$ $I^G(J^{PC})$ = $0^+(2^{+ +})$ J need confirmation.

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

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${{\mathit \chi}_{{{b2}}}{(2P)}}$ MASS $10268.65$ $\pm0.22$ $\pm0.50$ MeV

${\mathit m}_{{{\mathit \chi}_{{{b2}}}{(2P)}}}-{\mathit m}_{{{\mathit \chi}_{{{b1}}}{(2P)}}}$ $13.2$ $\pm0.4$ MeV (S = 1.8)

${{\mathit \gamma}}$ ENERGY IN ${{\mathit \Upsilon}{(3S)}}$ DECAY $86.19$ $\pm0.22$ MeV

▸  exp ${{\mathit \chi}_{{{b2}}}{(2P)}}$ Cross-Particle Branching Ratios

B(${{\mathit \chi}_{{{b2}}}{(2P)}}$ $\rightarrow$ ${{\mathit \chi}_{{{b2}}}{(1P)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) ${\times }$ B(${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \chi}_{{{b2}}}{(2P)}}{{\mathit X}}$) ($6.4$ $\pm0.9$) $ \times 10^{-4}$

B(${{\mathit \chi}_{{{b2}}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B(${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b2}}}{(2P)}}$) ${\times }$ B(${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$) ($2.02$ $\pm0.18$) $ \times 10^{-4}$

[B(${{\mathit \chi}_{{{b2}}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B(${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b2}}}{(2P)}}$)] / [B(${{\mathit \chi}_{{{b1}}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B(${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b1}}}{(2P)}}$)] $0.666$ $\pm0.030$

B(${{\mathit \chi}_{{{b2}}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(2S)}}$) ${\times }$ B(${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b2}}}{(2P)}}$) ${\times }$ B(${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$) ($2.74$ $\pm0.29$) $ \times 10^{-4}$

[B(${{\mathit \chi}_{{{b2}}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(2S)}}$) ${\times }$ B(${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b2}}}{(2P)}}$)] / [B(${{\mathit \chi}_{{{b1}}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(2S)}}$) ${\times }$ B(${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b1}}}{(2P)}}$)] $0.469$ $\pm0.020$

${{\mathit \chi}_{{{b2}}}{(2P)}}$ DECAY MODES

Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit \omega}}{{\mathit \Upsilon}{(1S)}}$ ($1.10^{+0.34}_{-0.30}$ ) $\%$ 194   $\Gamma_{2}$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(2S)}}$ ($8.9$ $\pm1.2$ ) $\%$ 242   $\Gamma_{3}$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$ ($6.6$ $\pm0.8$ ) $\%$ 776   $\Gamma_{4}$ ${{\mathit \pi}}{{\mathit \pi}}{{\mathit \chi}_{{{b2}}}{(1P)}}$ ($5.1$ $\pm0.9$) $ \times 10^{-3}$ 229   $\Gamma_{5}$ ${{\mathit D}^{0}}{{\mathit X}}$ <2.4 $\%$ CL=90%     $\Gamma_{6}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ $<1.1$ $\times 10^{-4}$ CL=90% 5082   $\Gamma_{7}$ 2 ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{-}}{{\mathit K}_S^0}$ $<9$ $\times 10^{-5}$ CL=90% 5082   $\Gamma_{8}$ 2 ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{-}}{{\mathit K}_S^0}$ 2 ${{\mathit \pi}^{0}}$ $<7$ $\times 10^{-4}$ CL=90% 5054   $\Gamma_{9}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$ ($3.9$ $\pm1.6$) $ \times 10^{-4}$ 5110   $\Gamma_{10}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ ($9$ $\pm4$) $ \times 10^{-5}$ 5068   $\Gamma_{11}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ ($2.4$ $\pm1.1$) $ \times 10^{-4}$ 5054   $\Gamma_{12}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$2 ${{\mathit \pi}^{0}}$ ($4.7$ $\pm2.3$) $ \times 10^{-4}$ 5037   $\Gamma_{13}$ 3 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{-}}{{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$ $<4$ $\times 10^{-4}$ CL=90% 5036   $\Gamma_{14}$ 3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}$ ($9$ $\pm4$) $ \times 10^{-5}$ 5110   $\Gamma_{15}$ 3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$ ($1.2$ $\pm0.4$) $ \times 10^{-3}$ 5088   $\Gamma_{16}$ 3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ ($1.4$ $\pm0.7$) $ \times 10^{-4}$ 5036   $\Gamma_{17}$ 3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ ($4.2$ $\pm1.7$) $ \times 10^{-4}$ 5017   $\Gamma_{18}$ 4 ${{\mathit \pi}^{+}}$4 ${{\mathit \pi}^{-}}$ ($9$ $\pm5$) $ \times 10^{-5}$ 5087   $\Gamma_{19}$ 4 ${{\mathit \pi}^{+}}$4 ${{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$ ($1.3$ $\pm0.5$) $ \times 10^{-3}$ 5058