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

Area of Science:

• High Energy Physics
• Particle Physics
• Hadron Spectroscopy

Background:

• Exotic mesons are particles not fitting the standard quark model.
• The X(5568) state has been previously claimed but lacks confirmation.
• Searches for exotic states are crucial for understanding fundamental particle interactions.

Purpose of the Study:

• To investigate the B_s0 pi+/- invariant mass distribution for evidence of exotic meson states.
• To search for the claimed X(5568) exotic meson state.
• To set limits on the production rates of potential exotic mesons.

Main Methods:

• Analysis of a large dataset of proton-proton collisions (3 fb^-1) collected by the LHCb detector at 7 and 8 TeV.
• Examination of the invariant mass distribution of B_s0 pi+/- systems.
• Statistical analysis to set upper limits on resonance production rates.

Main Results:

• No significant excess was observed in the B_s0 pi+/- invariant mass spectrum.
• Upper limits were placed on the production rate of the X(5568) state within the LHCb detector's acceptance.
• Limits were also derived for hypothetical exotic mesons decaying via B_s0 pi+/- or B_s*0 pi+/- (with B_s*0 -> B_s0 gamma).

Conclusions:

• The existence of the X(5568) state is not supported by this analysis.
• The study provides stringent constraints on the presence of exotic mesons in the investigated mass region.
• The results contribute to the ongoing search for new physics beyond the standard quark model.