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Regular version of the site

Article

Search for Baryon-Number Violating Ξ b 0 Oscillations

Physical Review Letters. 2017. Vol. 119. No. 18. P. 181807-1-181807-9.
LHCb C., Derkach D., Kazeev N., Ratnikov F., Rogozhnikov A., Ustyuzhanin A.

A search for baryon-number violating Ξb0 oscillations is performed with a sample of pp collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 3  fb−1. The baryon number at the moment of production is identified by requiring that the Ξb0 come from the decay of a resonance Ξb*−→Ξb0π− or Ξb′−→Ξb0π−, and the baryon number at the moment of decay is identified from the final state using the decays Ξb0→Ξc+π−,Ξc+→pK−π+. No evidence of baryon-number violation is found, and an upper limit at the 95% confidence level is set on the oscillation rate of ω<0.08  ps−1, where ω is the associated angular frequency.