LAUSR

Abstract A search for the $$ {\Xi}_{cc}^{++} $$ Ξ cc + + baryon through the $$ {\Xi}_{cc}^{++} $$ Ξ cc + + → D + pK − π + decay is performed with a data sample corresponding to an integrated luminosity of 1.7 fb −1 recorded by the LHCb experiment in pp collisions at a centre-of-mass energy of 13 TeV. No significant signal is observed in the mass range from the kinematic threshold of the decay to 3800 MeV/c 2. An upper limit is set on the ratio of branching fractions $$ \mathrm{\mathcal{R}}=\frac{\mathrm{\mathcal{B}}\left({\Xi}_{cc}^{++}\to {D}^{+}{pK}^{-}{\pi}^{+}\right)}{\mathrm{\mathcal{B}}\left({\Xi}_{cc}^{++}\to {\Lambda}_c^{+}{K}^{-}{\pi}^{+}{\pi}^{+}\right)} $$ ℛ = ℬ Ξ cc + + → D + pK − π + ℬ Ξ cc + + → Λ c + K − π + π + with ℛ < 1.7 (2.1) × 10 −2 at the 90% (95%) confidence level at the known mass of the $$ {\Xi}_{cc}^{++} $$ Ξ cc + + state.