${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6900)}^{0}}$ MASS

INSPIRE   JSON  (beta) PDGID:
M268M
VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ 6914 \pm11}$ OUR AVERAGE  Error includes scale factor of 1.6.  See the ideogram below.
$6927$ $\pm9$ $\pm4$ 1
HAYRAPETYAN
2024
CMS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit J / \psi}}{{\mathit X}}$
$6910$ $\pm10$ $\pm10$ 2
AAD
2023BL
 ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit J / \psi}}{{\mathit X}}$
$6886$ $\pm11$ $\pm11$ 3
AAIJ
2020AY
 LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit J / \psi}}{{\mathit X}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$6960$ $\pm50$ $\pm30$ 4
AAD
2023BL
 ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \psi}{(2S)}}{{\mathit X}}$
1  In a model with three resonances described by interfering relativistic Breit-Wigner functions above background from non-resonant single and double parton scattering and a threshold enhancement. The other two resonances have masses $6652$ $\pm10$ $\pm12$, $7287$ ${}^{+20}_{-18}$ $\pm5$ MeV and widths $124$ ${}^{+32}_{-26}$ $\pm33$, $95$ ${}^{+59}_{-40}$ $\pm19$ MeV, respectively.
2  In a model with two resonances, one describing the broad structure above threshold (mass $6650$ $\pm20$ ${}^{+30}_{-20}$ MeV, width $440$ $\pm50$ ${}^{+60}_{-50}$ MeV) interfering with single parton scattering, and a non-interfering ${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6900)}}$.
3  In a model where the broad structure above threshold interferes with non-resonant single parton scattering. Without interference the mass is $6905$ $\pm11$ $\pm7$ MeV.
4  Assuming a single resonance (could be another state). A 3$\sigma $ signal is observed for an additional resonance with mass $7220$ $\pm30$ ${}^{+10}_{-40}$ MeV and width $90$ $\pm60$ ${}^{+60}_{-50}$ MeV.

           ${{\mathit T}_{{{c c {{\overline{\mathit c}}} {{\overline{\mathit c}}}}}}{(6900)}^{0}}$ MASS (MeV)
References