Measurement of the properties of the Ξ b ∗ 0 baryon
Measurement of the properties of the Ξ b ∗ 0 baryon
We perform a search for near-threshold Ξ 0 resonances decaying to Ξ − π + in a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb−1 collected by the LHCb experiment. We observe one resonant state, with the following properties: $$ \begin{array}{l}m\left({\varXi}_b^{\ast 0}\right)-m\left({\varXi}_b^{-}\right)-m\left({\pi}^{+}\right)=15.727\pm 0.068\left(\mathrm{stat}\right)\pm 0.023\left(\mathrm{syst}\right)\mathrm{M}\mathrm{e}\mathrm{V}/{c}^2\\ {}\kern8em …