Studies of ${\mathrm {B}} ^{*}_{{\mathrm {s}}2}(5840)^0$ and ${\mathrm {B}} _{{\mathrm {s}}1}(5830)^0$ mesons including the observation of the $${mathrm {B}} ^{*}_{{mathrm {s}}2} (5840)^0 \rightarrow {mathrm {B}} ^0 mathrm {K} ^

12/12/2019