Science China Physics, Mechanics & Astronomy > 2020 > 63 > 2 > 1-15
Search for the doubly charmed baryon $$\Xi_{cc}^+$$ Ξ c c +
Source
Abstract
A search for the doubly charmed baryon $$\Xi_{cc}^+$$ Ξ c c + is performed through its decay to the $$\Lambda_c^ + {K^ -}{\pi ^ +}$$ Λ c + K − π + final state, using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV. The data correspond to a total integrated luminosity of 9 fb−1. No significant signal is observed in the mass range from 3.4 to 3.8 GeV/c2. Upper limits are set at 95% credibility level on the ratio of the $$\Xi_{cc}^+$$ Ξ c c + production cross-section times the branching fraction to that of $$\Lambda_c^ + $$ Λ c + and $$\Xi_{cc}^{+ +}$$ Ξ c c + + baryons. The limits are determined as functions of the $$\Xi_{cc}^+$$ Ξ c c + mass for different lifetime hypotheses, in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 4 to 15 GeV/c.
Identifiers
journal ISSN : | 1674-7348 |
journal e-ISSN : | 1869-1927 |
DOI | 10.1007/s11433-019-1471-8 |