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Regular version of the site

Article

Search for the rare decay Λ c+→ p μ+ μ−

A search for the flavor-changing neutral-current decay Λ c+→ p μ+ μ− is reported using a
data set corresponding to an integrated luminosity of 3.0 fb− 1 collected by the LHCb
Collaboration. No significant signal is observed outside of the dimuon mass regions around
the ϕ and ω resonances, and an upper limit is placed on the branching fraction of B (Λ c+→
p μ+ μ−)< 7.7 (9.6)× 10− 8 at 90%(95%) confidence level. A significant signal is observed in
the ω dimuon mass region for the first time.