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

INSPIRE   PDGID:
M300K01
MASS ${\mathrm {(MeV)}}$ WIDTH ${\mathrm {(MeV)}}$ DOCUMENT ID TECN CHG  COMMENT
$ 1964 \pm35 $ $225 \pm50$ 1
ARMSTRONG
1993D
 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 $\mathit J{}^{P}$.
References