Search for Structure in the B_{s}^{0}π^{±} Invariant Mass Spectrum.

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doi:10.1103/physrevlett.117.152003

Abstract

The B_{s}^{0}π^{±} invariant mass distribution is investigated in order to search for possible exotic meson states. The analysis is based on a data sample recorded with the LHCb detector corresponding to 3 fb^{-1} of pp collision data at sqrt[s]=7 and 8TeV. No significant excess is found, and upper limits are set on the production rate of the claimed X(5568) state within the LHCb acceptance. Upper limits are also set as a function of the mass and width of a possible exotic meson decaying to the B_{s}^{0}π^{±} final state. The same limits also apply to a possible exotic meson decaying through the chain B_{s}^{*0}π^{±}, B_{s}^{*0}→B_{s}^{0}γ where the photon is excluded from the reconstructed decays.

Highlights

Interest in exotic hadrons has recently intensified, with a wealth of experimental data becoming available [1,2]
The B0s mesons are reconstructed in decays to D−s πþ and J=ψφ final states to obtain a B0s yield approximately 20 times larger than that used by the D0 Collaboration
The minimum distance of a track to a primary vertex (PV), the impact parameter, is measured with a resolution of ð15 þ 29=pTÞ μm, where pT is the component of the momentum transverse to the beam, in GeV

Summary

Introduction

Interest in exotic hadrons has recently intensified, with a wealth of experimental data becoming available [1,2]. The B0s mesons are reconstructed in decays to D−s πþ and J=ψφ final states to obtain a B0s yield approximately 20 times larger than that used by the D0 Collaboration. The charged pion which is combined with the B0s meson in order to form the B0sπÆ candidate is referred to as the “companion pion”.

Results

Conclusion