# ${{\boldsymbol X}{(5568)}^{\pm}}$ MASS INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$5566.9$ ${}^{+3.2}_{-3.1}$ ${}^{+0.6}_{-1.2}$ 278 1
 2018 A
D0 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit B}_{{s}}^{0}}{{\mathit \pi}^{\pm}}{{\mathit X}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$5567.8$ $\pm2.9$ ${}^{+0.9}_{-1.9}$ 133 2
 2016 E
D0 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit B}_{{s}}^{0}}{{\mathit \pi}^{\pm}}{{\mathit X}}$
1  From the combined analysis of ${{\mathit B}_{{s}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \phi}}$ and ${{\mathit B}_{{s}}^{0}}$ $\rightarrow$ ${{\mathit D}_{{s}}^{\pm}}{{\mathit \mu}^{\mp}}{{\mathit X}}$ decays.
2  Assumes ${{\mathit X}{(5568)}^{\pm}}$ $\rightarrow$ ${{\mathit B}_{{s}}}{{\mathit \pi}^{\pm}}$ decay. If ${{\mathit X}{(5568)}^{\pm}}$ $\rightarrow$ ${{\mathit B}_{{s}}^{*}}{{\mathit \pi}^{\pm}}$ decay is assumed, the mass shifts upward by 49 MeV.
References:
 ABAZOV 2018A
PR D97 092004 Study of the ${X^\pm(5568)}$ state with semileptonic decays of the ${B_s^0}$ meson
 ABAZOV 2016E
PRL 117 022003 Evidence for a ${{\mathit B}_{{s}}^{0}}{{\mathit \pi}^{\pm}}$ State