INSPIRE   JSON PDGID:
M210

${{\mathit T}_{{{c {{\overline{\mathit c}}} 1}}}{(3900)}}$

$I^G(J^{PC})$ = $1^+(1^{+ -})$ 

was ${{\mathit Z}_{{{c}}}{(3900)}}$, ${{\mathit X}{(3900)}}$
Properties incompatible with a ${{\mathit q}}{{\overline{\mathit q}}}$ structure (exotic state). See the review on non-${{\mathit q}}{{\overline{\mathit q}}}$ states. Charged ${{\mathit T}_{{{c {{\overline{\mathit c}}} 1}}}{(3900)}^{\pm}}$ seen as a peak in the invariant mass distribution of the ${{\mathit J / \psi}}{{\mathit \pi}^{\pm}}$ system by BES III (ABLIKIM 2013T) in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit J / \psi}}$ at c.m. energy of 4.26 GeV and by radiative return from ${{\mathit e}^{+}}{{\mathit e}^{-}}$ collisions at $\sqrt {s }$ from 9.46 to 10.86 GeV at Belle (LIU 2013B). Partial wave analysis of ABLIKIM 2017J determines $\mathit J{}^{P} = 1{}^{+}$ with more than 7$~\sigma $ significance. Neutral ${{\mathit T}_{{{c {{\overline{\mathit c}}} 1}}}{(3900)}^{0}}$ seen in the ${{\mathit J / \psi}}{{\mathit \pi}^{0}}$ invariant mass distribution in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit J / \psi}}$ at c.m. energies of 4.23, 4.26, and 4.36 GeV by BES III (ABLIKIM 2015U) and at 4.17 GeV by XIAO 2013A. Peaks in (${{\mathit D}}{{\overline{\mathit D}}^{*}}){}^{0,\pm{}}$ reported by BES III (ABLIKIM 2014A, ABLIKIM 2015AB) are assumed to be related.
${{\mathit T}_{{{c {{\overline{\mathit c}}} 1}}}{(3900)}}$ MASS $3887.1$ $\pm2.6$ MeV (S = 1.7)
 
${{\mathit T}_{{{c {{\overline{\mathit c}}} 1}}}{(3900)}}$ WIDTH $28.4$ $\pm2.6$ MeV 
 
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{1}$ ${{\mathit J / \psi}}{{\mathit \pi}}$ seen 699
 
$\Gamma_{2}$ ${{\mathit h}_{{{c}}}}{{\mathit \pi}^{\pm}}$ not seen 318
 
$\Gamma_{3}$ ${{\mathit \eta}_{{{c}}}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ not seen 758
 
$\Gamma_{4}$ ${{\mathit \eta}_{{{c}}}{(1S)}}{{\mathit \rho}{(770)}^{\pm}}$ seen  
 
$\Gamma_{5}$ ( ${{\mathit D}}{{\overline{\mathit D}}^{*}}$) ${}^{+-}$ seen  
 
$\Gamma_{6}$ ${{\mathit D}^{0}}{{\mathit D}^{*-}}$ + c.c. seen 152
 
$\Gamma_{7}$ ${{\mathit D}^{-}}{{\mathit D}^{*0}}$ + c.c. seen 143
 
$\Gamma_{8}$ ${{\mathit \omega}}{{\mathit \pi}^{\pm}}$ not seen 1862
 
$\Gamma_{9}$ ${{\mathit J / \psi}}{{\mathit \eta}}$ not seen 510
 
$\Gamma_{10}$ ${{\mathit D}^{+}}{{\mathit D}^{*-}}$ + c.c seen  
 
$\Gamma_{11}$ ${{\mathit D}^{0}}{{\overline{\mathit D}}^{*0}}$ + c.c seen