${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$ MESONS
(including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)
INSPIRE   JSON PDGID:
M078

${{\mathit \chi}_{{{b2}}}{(1P)}}$

$I^G(J^{PC})$ = $0^+(2^{+ +})$ J need confirmation.
Observed in radiative decay of the ${{\mathit \Upsilon}{(2S)}}$, therefore ${}^{C} = +$. Branching ratio requires E1 transition, M1 is strongly disfavored, therefore ${}^{P} = +$. $\mathit J = 2$ from SKWARNICKI 1987.
${{\mathit \chi}_{{{b2}}}{(1P)}}$ MASS   $9912.21 \pm0.26 \pm0.31$ MeV 
 
${\mathit m}_{{{\mathit \chi}_{{{b2}}}{(1P)}}}–{\mathit m}_{{{\mathit \chi}_{{{b1}}}{(1P)}}}$   $19.10 \pm0.25$ MeV (S = 1.1)
 
${{\mathit \gamma}}$ ENERGY IN ${{\mathit \Upsilon}{(2S)}}$ DECAY   $110.44 \pm0.29$ MeV (S = 1.1)
 
B( ${{\mathit \chi}_{{{b2}}}{(1P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b2}}}{(1P)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$)   $(3.38 \pm0.16) \times 10^{-4}$  
 
[B( ${{\mathit \chi}_{{{b2}}}{(1P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b2}}}{(1P)}}$)] $/$ [B( ${{\mathit \chi}_{{{b1}}}{(1P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b1}}}{(1P)}}$)]   $0.556 \pm0.016$  
 
B( ${{\mathit \chi}_{{{b2}}}{(1P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b2}}}{(1P)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$)   $(3.8 \pm0.5) \times 10^{-5}$  
 
$\Gamma_{1}$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$   $(18.0\pm{1.0})\%$ 442
 
$\Gamma_{2}$ ${{\mathit D}^{0}}{{\mathit X}}$   $<7.9\%$ CL=90%  
 
$\Gamma_{3}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$   $(8\pm{5})\times 10^{-5}$ 4902
 
$\Gamma_{4}$ 2 ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{-}}{{\mathit K}_S^0}$   $<1.0\times 10^{-4}$ CL=90% 4901
 
$\Gamma_{5}$ 2 ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit K}^{-}}{{\mathit K}_S^0}$ 2 ${{\mathit \pi}^{0}}$   $(5.3\pm{2.4})\times 10^{-4}$ 4873
 
$\Gamma_{6}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$   $(3.5\pm{1.4})\times 10^{-4}$ 4931
 
$\Gamma_{7}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$   $(1.1\pm{0.4})\times 10^{-4}$ 4888
 
$\Gamma_{8}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$   $(2.1\pm{0.9})\times 10^{-4}$ 4872
 
$\Gamma_{9}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$2 ${{\mathit \pi}^{0}}$   $(3.9\pm{1.8})\times 10^{-4}$ 4855
 
$\Gamma_{10}$ 3 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}{{\mathit K}^{-}}{{\mathit K}_S^0}$ ${{\mathit \pi}^{0}}$   $<5\times 10^{-4}$ CL=90% 4854
 
$\Gamma_{11}$ 3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}$   $(7.0\pm{3.1})\times 10^{-5}$ 4931
 
$\Gamma_{12}$ 3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$   $(1.0\pm{0.4})\times 10^{-3}$ 4908
 
$\Gamma_{13}$ 3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$   $<8\times 10^{-5}$ CL=90% 4854
 
$\Gamma_{14}$ 3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$   $(3.6\pm{1.5})\times 10^{-4}$ 4835
 
$\Gamma_{15}$ 4 ${{\mathit \pi}^{+}}$4 ${{\mathit \pi}^{-}}$   $(8\pm{4})\times 10^{-5}$ 4907
 
$\Gamma_{16}$ 4 ${{\mathit \pi}^{+}}$4 ${{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$   $(1.8\pm{0.7})\times 10^{-3}$ 4877
 
$\Gamma_{17}$ ${{\mathit J / \psi}}{{\mathit J / \psi}}$   $<4\times 10^{-5}$ CL=90% 3869
 
$\Gamma_{18}$ ${{\mathit J / \psi}}{{\mathit \psi}{(2S)}}$   $<5\times 10^{-5}$ CL=90% 3608
 
$\Gamma_{19}$ ${{\mathit \psi}{(2S)}}{{\mathit \psi}{(2S)}}$   $<1.6\times 10^{-5}$ CL=90% 3313
 
$\Gamma_{20}$ ${{\mathit J / \psi}{(1S)}}$ anything   $(1.5\pm{0.4})\times 10^{-3}$  
 
FOOTNOTES