B⁺_c physics at LHCb

We present recent LHCb results in B+_c physics with four topics. Using 3fb⁻¹ of data collected in 2011 and 2012 produced in pp collisions, a baryonic decay mode, B⁺_c → J/ψpπ⁺, is observed for the first time. With 1fb⁻¹ of data collected in 2011, the first measurement of the relative branching ratio B(B⁺_c → J/ψμ⁺)/B(B⁺_c → J/ψμ⁺ν_μ) is performed. With 2fb⁻¹ of data collected in 2012, the lifetime of the B⁺_c meson is measured with the semileptonic decay B⁺_c → J/ψμ⁺ν_μ. Finally, evidence is presented for the decay B⁺_c → J/ψ3π⁺2π⁻ using pp collision data, corresponding to an integrated luminosity of 3fb⁻¹.