Search for the doubly heavy Ξ bc 0 $$ {\Xi}_{bc}^0 $$ baryon via decays to D0pK−

• Main Authors: Aaij, R. (Author), Abellán Beteta, C. (Author), Ackernley, T. (Author), Adeva, B. (Author), Adinolfi, M. (Author), Afsharnia, H. (Author), Aidala, C. A. (Author), Aiola, S. (Author), Ajaltouni, Z. (Author), Akar, S. (Author), Albrecht, J. (Author), Alessio, F. (Author), Alexander, M. (Author), Alfonso Albero, A. (Author), Aliouche, Z. (Author)
• Format: Article
• Language: English
• Published: Springer Berlin Heidelberg, 2021-09-20T17:41:23Z.
• Subjects: Article
• Online Access: Get fulltext

 Abstract A search for the doubly heavy Ξ bc 0 $$ {\Xi}_{bc}^0 $$ baryon using its decay to the D0pK- 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. No significant signal is found in the invariant mass range from 6.7 to 7.2 GeV/c2. Upper limits are set at 95% credibility level on the ratio of the Ξ bc 0 $$ {\Xi}_{bc}^0 $$ production cross-section times its branching fraction to D0pK− relative to that of the Λ b 0 → D 0 pK − $$ {\Lambda}_b^0\to {D}^0{pK}^{-} $$ decay. The limits are set as a function of the Ξ bc 0 $$ {\Xi}_{bc}^0 $$ 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 to 3.0 × 10−1 for the considered Ξ bc 0 $$ {\Xi}_{bc}^0 $$ mass and lifetime hypotheses.