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Regular version of the site

Article

Search for the doubly heavy Ξ0𝑏𝑐 baryon via decays to D0pK−

Journal of High Energy Physics. 2020. Vol. 11. No. 095. P. 1-20.

A search for the doubly heavy {\Xi}_{bc}^0Ξbc0​ baryon using its decay to the D^{0}0pK^{–}– final state is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment between 2016 and 2018, corresponding to an integrated luminosity of 5.4 fb^{−1}−1. No significant signal is found in the invariant mass range from 6.7 to 7.2 GeV/c^{2}2. Upper limits are set at 95% credibility level on the ratio of the {\Xi}_{bc}^0Ξbc0​ production cross-section times its branching fraction to D^{0}0pK^{−}− relative to that of the {\Lambda}_b^0\to {D}^0{pK}^{-}Λb0​→D0pK− decay. The limits are set as a function of the {\Xi}_{bc}^0Ξbc0​ mass and lifetime hypotheses, in the rapidity range from 2.0 to 4.5 and in the transverse momentum region from 5 to 25 GeV/c. Upper limits range from 1.7 × 10^{−2}−2 to 3.0 × 10^{−1}−1 for the considered {\Xi}_{bc}^0Ξbc0​ mass and lifetime hypotheses.