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$\mathbf {{{\mathit X}{(2000)}}}$ $\mathit I{}^{G}(\mathit J{}^{PC}) = 1{}^{-}(?{}^{?+})$

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M300K01

MASS ${\mathrm {(MeV)}}$ WIDTH ${\mathrm {(MeV)}}$ DOCUMENT ID TECN CHG  COMMENT $ 1964 \pm35 $ $225 \pm50$ 1 ARMSTRONG 1993 D E760 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ 3 ${{\mathit \pi}^{0}}$ $\rightarrow$ 6 ${{\mathit \gamma}}$ $ \sim2100 $ $\sim500$ 1 ANTIPOV 1977 CIBS - 25 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{-}}{{\mathit \rho}_{{{3}}}}$ $ 2214 \pm15 $ $355 \pm21$ 2 BALTAY 1977 HBC 0 15 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Delta}^{++}}$3 ${{\mathit \pi}}$ $ 2080 \pm40 $ $340 \pm80$ KALELKAR 1975 HBC + 15 ${{\mathit \pi}^{+}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit \pi}^{+}}{{\mathit \rho}_{{{3}}}}$ 1  Cannot determine spin to be 3. 2  BALTAY 1977 favors $\mathit J{}^{P}$.

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