Search for the X(5568) State Decaying into B-s(0)pi(+/-) in Proton-Proton Collisions at root s=8 TeV
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
A search for resonancelike structures in the ({B}{s}^{0}{\pi }^{±}) invariant mass spectrum is performed using proton-proton collision data collected by the CMS experiment at the LHC at (\sqrt{s}=8\text{}\text{}\mathrm{TeV}), corresponding to an integrated luminosity of (19.7\text{}\text{}{\mathrm{fb}}^{-1}). The ({B}{s}^{0}) mesons are reconstructed in the decay chain ({B}{s}^{0}\to J/\psi \varphi ), with (J/\psi \to {\mu }^{+}{\mu }^{-}) and (\varphi \to {K}^{+}{K}^{-}). The ({B}{s}^{0}{\pi }^{±}) invariant mass distribution shows no statistically significant peaks for different selection requirements on the reconstructed ({B}{s}^{0}) and ({\pi }^{±}) candidates. Upper limits are set on the relative production rates of the (X\left(5568\right)) and ({B}{s}^{0}) states times the branching fraction of the decay (X\left(5568{\right)}^{±}\to {B}{s}^{0}{\pi }^{±}). In addition, upper limits are obtained as a function of the mass and the natural width of possible exotic states decaying into ({B}{s}^{0}{\pi }^{±}).