@Article{LHCbCollaborationAaij_etal2017, author="LHCb Collaboration (Aaij, R. et al and Garcia Martin, L. M. and Henry, L. and Martinez-Vidal, F. and Oyanguren, A. and Remon Alepuz, C. and Ruiz Valls, P. and Ruiz Vidal, J. and Sanchez Mayordomo, C.", title="Observation of the Doubly Charmed Baryon Xi(++)(cc)", journal="Physical Review Letters", year="2017", publisher="Amer Physical Soc", volume="119", number="11", pages="112001 - 10pp", abstract="A highly significant structure is observed in the Lambda K-+(c)-pi(+)pi(+) mass spectrum, where the Lambda(+)(c) baryon is reconstructed in the decay mode pK(-)pi(+). The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon Xi(++)(cc). The difference between the masses of the Xi(++)(cc) and Lambda(+)(c) states is measured to be 1334.94 +/- 0.72(stat.) +/- 0.27(syst.) MeV/c(2), and the Xi(++)(cc) mass is then determined to be 3621.40 +/- 0.72(stat.) +/- 0.27(syst.) +/- 0.14(Lambda(+)(c)) MeV/c(2), where the last uncertainty is due to the limited knowledge of the Lambda(+)(c) mass. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7 fb(-1), and confirmed in an additional sample of data collected at 8 TeV.", optnote="WOS:000410190800002", optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3290), last updated on Tue, 26 Sep 2017 15:09:54 +0000", issn="0031-9007", doi="10.1103/PhysRevLett.119.112001", opturl="http://arxiv.org/abs/1707.01621", opturl="https://doi.org/10.1103/PhysRevLett.119.112001", archivePrefix="arXiv", eprint="1707.01621", language="English" }