${{\mathit X}{(6900)}}$ MASS

INSPIRE   PDGID:
M268M
VALUE (MeV) DOCUMENT ID TECN  COMMENT
$6886$ $\pm11$ $\pm11$ 1
AAIJ
2020AY
 LHCB ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit J / \psi}}{{\mathit X}}$
1  AAIJ 2020AY value assumes the interference of a Breit-Wigner shape with non-resonant single-parton scattering. Without interference, the mass is $6905$ $\pm11$ $\pm7$ MeV.
References:
AAIJ 2020AY
SCIB 65 1983