Search for the doubly charmed baryon $\Xi_{cc}^+$
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Publication date
October 2013
DOI Publisher
Springer Science and Business Media LLCAbstract
A search for the doubly charmed baryon $\Xi_{cc}^{+}$ in the decay mode $\Xi_{cc}^{+} \to \Lambda_c^+ K^- \pi^+$ is performed with a data sample, corresponding to an integrated luminosity of 0.65 fb$^{-1}$, 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$/c^2$. Upper limits at the 95\% confidence level on the ratio of the $\Xi_{cc}^{+}$ production cross-section times branching fraction to that of the $\Lambda_c^+$, $R$, are given as a function of the $\Xi_{cc}^{+}$ mass and lifetime. The largest upper limits range from $R<1.5 \times 10^{-2}$ for a lifetime of 100 fs to $R<3.9 \times 10^{-4}$ for a lifetime of 400 fs
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