pdgLive Home   >   Further States   >   $\mathbf {B( {{\mathit J / \psi}} \rightarrow {{\mathit \gamma}} {{\mathit X}{(2600)}} ) {\times } B( {{\mathit X}{(2600)}} \rightarrow {{\mathit f}_{{0}}{(1500)}} {{\mathit \eta}^{\,'}} ) {\times } B( {{\mathit f}_{{0}}{(1500)}} \rightarrow {{\mathit \pi}^{+}} {{\mathit \pi}^{-}} )}$

$\mathbf {B( {{\mathit J / \psi}} \rightarrow {{\mathit \gamma}} {{\mathit X}{(2600)}} ) {\times } B( {{\mathit X}{(2600)}} \rightarrow {{\mathit f}_{{0}}{(1500)}} {{\mathit \eta}^{\,'}} ) {\times } B( {{\mathit f}_{{0}}{(1500)}} \rightarrow {{\mathit \pi}^{+}} {{\mathit \pi}^{-}} )}$

INSPIRE   PDGID:

M300A02

VALUE ($ 10^{-5} $) DOCUMENT ID TECN  COMMENT $3.09$ $\pm0.21$ ${}^{+1.14}_{-0.77}$ 1 ABLIKIM 2022 G BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}^{\,'}}$ 1  The ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ mass spectrum is described by a coherent sum of two Breit-Wigner resonances, ${{\mathit f}_{{0}}{(1500)}}$ and a new ${{\mathit X}{(1540)}}$ with mass $1540.2$ $\pm7.0$ ${}^{+36.3}_{-6.1}$ MeV and width $157$ $\pm19$ ${}^{+11}_{-77}$ MeV.

References:

ABLIKIM 2022G PRL 129 042001 Observation of a State $X(2600)$ in the $\pi^{+}\pi^{-}\eta'$ System in the Process $J/\psi\rightarrow\gamma\pi^{+}\pi^{-}\eta'$