${{\mathit \chi}_{{{c1}}}{(3872)}}$ T-MATRIX POLE $\sqrt {\mathit s }$ relative to ${{\mathit D}^{0}}{{\mathit D}^{*+}}$ threshold

INSPIRE   JSON  (beta) PDGID:
M176TMP
M176TMP
VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ (0.01 \pm0.15 {}^{+0.07}_{-0.08} \pm0.07) − {\mit i}~(0.19 \pm0.08 {}^{+0.14}_{-0.19})}$ OUR ESTIMATE
$(0.01 \pm0.15 {}^{+0.07}_{-0.08} \pm0.07) − {\mit i}~(0.19 \pm0.08 {}^{+0.14}_{-0.19})$ 1, 2
ABLIKIM
2024C
 
BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{c1}}}{(3872)}}$
1  From simultaneous line shape fits of ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{c1}}}{(3872)}}$ $\rightarrow$ ${{\mathit \gamma}}$ $\lbrack{}$ ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}{{\mathit \pi}^{0}}$ $\rbrack{}$ and ${{\mathit \gamma}}$ $\lbrack{}$ ${{\mathit J / \psi}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $\rbrack{}$. The most prominent pole is reported at $7.04$ $\pm0.15$ ${}^{+0.07}_{-0.08}$ MeV above the ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}{{\mathit \pi}^{0}}$ threshold of 3864.66 MeV on the first sheet with respect to the ${{\mathit D}^{*0}}{{\overline{\mathit D}}^{0}}$ channel. The uncertainty in the ${{\mathit D}^{0}}$ width is included in the uncertainty of the pole mass.
2  The final uncertainty on the real part of the pole location comes from the uncertainty in the ${{\mathit D}^{-}}$ and ${{\mathit D}^{*0}}$ meson masses.
References