Search for the Exotic Meson X(5568) with the Collider Detector at Fermilab

Area of Science:

• Particle Physics
• High-Energy Physics
• Hadron Spectroscopy

Background:

• Exotic mesons are candidates for new physics beyond the Standard Model.
• The X(5568) exotic meson was previously observed, but its existence remains debated.
• Understanding the properties of exotic mesons is crucial for advancing hadron physics.

Purpose of the Study:

• To search for evidence of the exotic meson X(5568) decaying into the B0sπ± final state.
• To set limits on the production rate of the X(5568) if it exists.
• To contribute to the ongoing discussion about the nature of exotic hadrons.

Main Methods:

• Analysis of proton-antiproton collision data at √s = 1960 GeV.
• Utilizing data collected by the Collider Detector at Fermilab (CDF).
• Performing a search for the specific decay channel X(5568) → B0sπ±.

Main Results:

• No significant evidence for the exotic meson X(5568) was observed in the analyzed dataset.
• An upper limit of 6.7% at the 95% confidence level was established for the fraction of B0s mesons produced via X(5568) → B0sπ±.
• The findings challenge previous observations of the X(5568) state.

Conclusions:

• The non-observation of the X(5568) in this analysis suggests it may not be a prominent state or may not exist.
• Further experimental and theoretical investigations are needed to resolve the status of the X(5568).
• This study provides crucial constraints on exotic meson properties in high-energy physics.