Search for the X(5568) State Decaying into B-s(0)pi(+/-) in Proton-Proton Collisions at root s=8 TeV

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Date
2018
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American Physical Society
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 }^{±}).

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Keywords
QED RADIATIVE-CORRECTIONS, UNIVERSAL MONTE-CARLO, PHOTOS, Physics, Multidisciplinary, Physics
Citation
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Escalante Del Valle, A., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V. M., Grossmann, J., Hrubec, J., Jeitler, M., … König, A. (2018). Search for the X(5568) State Decaying into Bs0π± in Proton-Proton Collisions at s=8  TeV. In Physical Review Letters (Vol. 120, Issue 20). American Physical Society (APS). https://doi.org/10.1103/physrevlett.120.202005