$\mathbf {{{\mathit K}_{{{1}}}{(2085)}}}$ $\mathit I{}^{G}(\mathit J{}^{PC}) = ?{}^{?}(1{}^{+?})$

INSPIRE   JSON  (beta) PDGID:
M300J01
MASS ${\mathrm {(MeV)}}$ WIDTH ${\mathrm {(MeV)}}$ DOCUMENT ID TECN  COMMENT
$ 2084 {}^{+4}_{-2} \pm9 $ $58 {}^{+4}_{-3} \pm25$ 1, 2
ABLIKIM
2023BG
 BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\overline{\mathit \Lambda}}}$
$ 2075 \pm12 \pm5 $ $90 \pm35 \pm9$ 3
ABLIKIM
2004J
 BES2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit p}}{{\overline{\mathit \Lambda}}}$
1  The reported mass and width are the pole positions in the complex (M, $\Gamma $) plane.
2  Signal observed with a statistical significance $>20\sigma $ comes from 3883 candidate events. Spin parity determined to be $\mathit J{}^{P} = 1{}^{+}$ with a statistical significance $>5\sigma $ over $0{}^{-}{}^{}$, $1{}^{-}{}^{}$, $2{}^{+}{}^{}$ hypotheses, and in the range within $3.1 - 7.5$ $\sigma $ with respect to $2{}^{-}{}^{}$.
3  From a fit in the region $\mathit M_{{{\mathit p}} {{\overline{\mathit \Lambda}}}}−\mathit M_{{{\mathit p}}}−\mathit M_{{{\mathit \Lambda}}}$ $<$ 150 MeV. ${\mathit S}{\mathrm -wave}$ in the ${{\mathit p}}{{\overline{\mathit \Lambda}}}$ system preferred. A similar near-threshold enhancement in the ${{\mathit p}}{{\overline{\mathit \Lambda}}}$ system is observed in ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\overline{\mathit \Lambda}}}{{\overline{\mathit D}}^{0}}$ by CHEN 2011F.
References