Measurement of the lifetime of the doubly charmed baryon Ξc+c+

Abstract

The first measurement of the lifetime of the doubly charmed baryon Ξc+c+ is presented, with the signal reconstructed in the final state Λ_{c}^{+}K^{-}π^{+}π^{+}. The data sample used corresponds to an integrated luminosity of 1.7  fb^{-1}, collected by the LHCb experiment in proton-proton collisions at a center-of-mass energy of 13 TeV. The Ξc+c+ lifetime is measured to be 0.256_{-0.022}^{+0.024}(stat)±0.014(syst)  ps

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