# Search for the rare decay $\Lambda_c^+ \to p\mu^+\mu^-$

LHCb Collaboration; Bernet, R; Müller, K; Serra, N; Steinkamp, O; Straumann, U; Vollhardt, A; et al (2018). Search for the rare decay $\Lambda_c^+ \to p\mu^+\mu^-$. Physical Review. D, Particles, fields, gravitation and cosmology, D97(9):091101.

## Abstract

A search for the flavor-changing neutral-current decay Λ+c→pμ+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→pμ+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.

## Abstract

A search for the flavor-changing neutral-current decay Λ+c→pμ+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→pμ+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.

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