pdgLive

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

INSPIRE search

${{\boldsymbol \chi}_{{b1}}{(1P)}}$

$I^G(J^{PC})$ = $0^+(1^{+ +})$ J need confirmation.

Observed in radiative decay of the ${{\mathit \Upsilon}{(2S)}}$, therefore ${}^{C} = +$. Branching ratio requires E1 transition, M1 is strongly disfavored, therefore ${}^{P} = +$. $\mathit J = 1$ from SKWARNICKI 1987 .

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

$9892.78 \pm0.26 \pm0.31$ MeV

${{\mathit \gamma}}$ ENERGY IN ${{\mathit \Upsilon}{(2S)}}$ DECAY

$129.63 \pm0.33$ MeV (S = 1.3)

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

$(5.90 \pm0.34) \times 10^{-4}$ (S = 1.3)

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

$(1.30 \pm0.34) \times 10^{-5}$

B( ${{\mathit \chi}_{{b2}}{(1P)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit X}}{+}$ ${{\overline{\mathit p}}}{{\mathit X}}$ )/B( ${{\mathit \chi}_{{b1}}{(1P)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit X}}{+}$ ${{\overline{\mathit p}}}{{\mathit X}}$ )

B( ${{\mathit \chi}_{{b0}}{(1P)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit X}}{+}$ ${{\overline{\mathit p}}}{{\mathit X}}$ )/B( ${{\mathit \chi}_{{b1}}{(1P)}}$ $\rightarrow$ ${{\mathit p}}{{\mathit X}}{+}$ ${{\overline{\mathit p}}}{{\mathit X}}$ )

${{\boldsymbol \chi}_{{b1}}{(1P)}}$ Decay Modes

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

$(35.2\pm{2.0})\%$

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

$(12.6\pm{2.2})\%$

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

$(2.0\pm{0.6})\times 10^{-4}$

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

$(1.3\pm{0.5})\times 10^{-4}$

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

$<6\times 10^{-4}$

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

$(8.0\pm{2.5})\times 10^{-4}$

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

$(1.5\pm{0.5})\times 10^{-4}$

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

$(3.5\pm{1.2})\times 10^{-4}$

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

$(8.6\pm{3.2})\times 10^{-4}$

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

$(9.3\pm{3.3})\times 10^{-4}$

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

$(1.9\pm{0.6})\times 10^{-4}$

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

$(1.7\pm{0.5})\times 10^{-3}$

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

$(2.6\pm{0.8})\times 10^{-4}$

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

$(7.5\pm{2.6})\times 10^{-4}$

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

$(2.6\pm{0.9})\times 10^{-4}$

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

$(1.4\pm{0.6})\times 10^{-3}$

${{\mathit \omega}}$ anything

$(4.9\pm{1.4})\%$

${{\mathit \omega}}{{\mathit X}_{{tetra}}}$

$<4.44\times 10^{-4}$

${{\mathit J / \psi}}{{\mathit J / \psi}}$

$<2.7\times 10^{-5}$

${{\mathit J / \psi}}{{\mathit \psi}{(2S)}}$

$<1.7\times 10^{-5}$

${{\mathit \psi}{(2S)}}{{\mathit \psi}{(2S)}}$

$<6\times 10^{-5}$

${{\mathit J / \psi}{(1S)}}$ anything

$<1.1\times 10^{-3}$

${{\mathit J / \psi}{(1S)}}{{\mathit X}_{{tetra}}}$

$<2.27\times 10^{-4}$

FOOTNOTES

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