[ τ(Ξcc++) = 0.256+0.024-0.022±0.014 ps ] Last year the LHCb Collaboration announced the observation of an exceptionally charmed particle, the Ξcc++ baryon. This contains two charm quarks and one up quark, resulting in an overall doubly positive charge. The Ξcc++ baryon was identified via its decay into a Λc+ baryon and three lighter mesons K–,…