Search for the doubly charmed baryon Xicc+
Abstract
A search for the doubly charmed baryon Xicc+ in the decay mode Xicc+ -> Lambdac+ K- pi+ is performed with a data sample, corresponding to an integrated luminosity of 0.65/fb, of pp collisions recorded at a centre-of-mass energy of 7 TeV. No significant signal is found in the mass range 3300-3800 MeV/c2. Upper limits at the 95% confidence level on the ratio of the Xicc+ production cross-section times branching fraction to that of the Lambdac+, R, are given as a function of the Xicc+ mass and lifetime. The largest upper limits range from R < 1.5 x 10-2 for a lifetime of 100 fs to R < 3.9 x 10-4 for a lifetime of 400 fs.
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