${\boldsymbol {\boldsymbol c}}$ ${\boldsymbol {\overline{\boldsymbol c}}}$ MESONS
(including possibly non- ${\boldsymbol {\boldsymbol q}}$ ${\boldsymbol {\overline{\boldsymbol q}}}$ states)
INSPIRE search

${{\boldsymbol \psi}{(4260)}}$ $I^G(J^{PC})$ = $0^-(1^{- -})$

also known as ${{\mathit Y}{(4260)}}$; was ${{\mathit X}{(4260)}}$
This state shows properties different from a conventional ${{\mathit q}}{{\overline{\mathit q}}}$ state. A candidate for an exotic structure. See the review on non- ${{\mathit q}}{{\overline{\mathit q}}}$ states. Seen in radiative return from ${{\mathit e}^{+}}{{\mathit e}^{-}}$ collisions at $\sqrt {s }$ = $9.54 - 10.58$ GeV by AUBERT,B 2005I, HE 2006B, and YUAN 2007 , and in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ collisions at $\sqrt {s }$ $\approx{}$ 4.26 GeV by COAN 2006 . Possibly seen by AUBERT 2006 in ${{\mathit B}^{-}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit J / \psi}}$ . See also the review on "Spectroscopy of mesons containing two heavy quarks."
${{\mathit \psi}{(4260)}}$ MASS   $4230 \pm8$ MeV (S = 2.9)
${{\mathit \psi}{(4260)}}$ WIDTH   $55 \pm19$ MeV (S = 4.4)
$\Gamma_{1}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ 2115
$\Gamma_{2}$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ seen950
$\Gamma_{3}$ ${{\mathit J / \psi}}{{\mathit f}_{{0}}{(980)}}$ , ${{\mathit f}_{{0}}{(980)}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ seen
$\Gamma_{4}$ ${{\mathit Z}_{{c}}{(3900)}^{\pm}}{{\mathit \pi}^{\mp}}$ , ${{\mathit Z}_{{c}}^{\pm}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{\pm}}$ seen
$\Gamma_{5}$ ${{\mathit J / \psi}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ seen952
$\Gamma_{6}$ ${{\mathit J / \psi}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ seen477
$\Gamma_{7}$ ${{\mathit J / \psi}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ not seen465
$\Gamma_{8}$ ${{\mathit J / \psi}}{{\mathit \eta}}$ not seen857
$\Gamma_{9}$ ${{\mathit J / \psi}}{{\mathit \pi}^{0}}$ not seen974
$\Gamma_{10}$ ${{\mathit J / \psi}}{{\mathit \eta}^{\,'}}$ not seen520
$\Gamma_{11}$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ not seen912
$\Gamma_{12}$ ${{\mathit J / \psi}}{{\mathit \eta}}{{\mathit \pi}^{0}}$ not seen780
$\Gamma_{13}$ ${{\mathit J / \psi}}{{\mathit \eta}}{{\mathit \eta}}$ not seen247
$\Gamma_{14}$ ${{\mathit \psi}{(2S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ not seen437
$\Gamma_{15}$ ${{\mathit \psi}{(2S)}}{{\mathit \eta}}$ not seen-1
$\Gamma_{16}$ ${{\mathit \chi}_{{c0}}}{{\mathit \omega}}$ not seen205
$\Gamma_{17}$ ${{\mathit \chi}_{{c1}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ not seen537
$\Gamma_{18}$ ${{\mathit \chi}_{{c2}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ not seen489
$\Gamma_{19}$ ${{\mathit h}_{{c}}{(1P)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ not seen593
$\Gamma_{20}$ ${{\mathit \phi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ not seen1982
$\Gamma_{21}$ ${{\mathit \phi}}{{\mathit f}_{{0}}{(980)}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ not seen
$\Gamma_{22}$ ${{\mathit D}}{{\overline{\mathit D}}}$ not seen998
$\Gamma_{23}$ ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}$ not seen998
$\Gamma_{24}$ ${{\mathit D}^{+}}{{\mathit D}^{-}}$ not seen989
$\Gamma_{25}$ ${{\mathit D}^{*}}{{\overline{\mathit D}}}$ +c.c. not seen887
$\Gamma_{26}$ ${{\mathit D}^{*}{(2007)}^{0}}{{\overline{\mathit D}}^{0}}$ +c.c. not seen
$\Gamma_{27}$ ${{\mathit D}^{*}{(2010)}^{+}}{{\mathit D}^{-}}$ +c.c. not seen
$\Gamma_{28}$ ${{\mathit D}^{*}}{{\overline{\mathit D}}^{*}}$ not seen657
$\Gamma_{29}$ ${{\mathit D}^{*}{(2007)}^{0}}{{\overline{\mathit D}}^{*}{(2007)}^{0}}$ not seen668
$\Gamma_{30}$ ${{\mathit D}^{*}{(2010)}^{+}}{{\mathit D}^{*}{(2010)}^{-}}$ not seen657
$\Gamma_{31}$ ${{\mathit D}}{{\overline{\mathit D}}}{{\mathit \pi}}$ +c.c. 
$\Gamma_{32}$ ${{\mathit D}^{0}}{{\mathit D}^{-}}{{\mathit \pi}^{+}}$ +c.c. (excl. ${{\mathit D}^{*}{(2007)}^{0}}{{\overline{\mathit D}}^{*0}}$ +c.c., ${{\mathit D}^{*}{(2010)}^{+}}{{\mathit D}^{-}}$ +c.c.) not seen
$\Gamma_{33}$ ${{\mathit D}}{{\overline{\mathit D}}^{*}}{{\mathit \pi}}$ +c.c. (excl. ${{\mathit D}^{*}}{{\overline{\mathit D}}^{*}}$ ) not seen723
$\Gamma_{34}$ ${{\mathit D}^{0}}{{\mathit D}^{*-}}{{\mathit \pi}^{+}}$ +c.c. (excl. ${{\mathit D}^{*}{(2010)}^{+}}{{\mathit D}^{*}{(2010)}^{-}}$ ) not seen
$\Gamma_{35}$ ${{\mathit D}^{0}}{{\mathit D}^{*}{(2010)}^{-}}{{\mathit \pi}^{+}}$ +c.c. not seen716
$\Gamma_{36}$ ${{\mathit D}^{*}}{{\overline{\mathit D}}^{*}}{{\mathit \pi}}$ not seen395
$\Gamma_{37}$ ${{\mathit D}_{{s}}^{+}}{{\mathit D}_{{s}}^{-}}$ not seen774
$\Gamma_{38}$ ${{\mathit D}_{{s}}^{*+}}{{\mathit D}_{{s}}^{-}}$ +c.c. not seen615
$\Gamma_{39}$ ${{\mathit D}_{{s}}^{*+}}{{\mathit D}_{{s}}^{*-}}$ not seen109
$\Gamma_{40}$ ${{\mathit p}}{{\overline{\mathit p}}}$ not seen1896
$\Gamma_{41}$ ${{\mathit p}}{{\overline{\mathit p}}}{{\mathit \pi}^{0}}$ not seen1860
$\Gamma_{42}$ ${{\mathit K}_S^0}$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{\mp}}$ not seen2037
$\Gamma_{43}$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ not seen2038