First observation of the doubly charmed baryon Xi(+)(cc)

Mattson, M.; Alkhazov, G.; Atamantchouk, A. G.; Balatz, M. Y.; Bondar, N. F.; Cooper, P. S.; Dauwe, L. J.; Davidenko, G. V.; Dersch, U.; Dolgolenko, A. G.; Dzyubenko, G. B.; Edelstein, R.; Emediato, L.; Endler, A. M. F.; Engelfried, J.; Eschrich, I.; Escobar, C. O.; Evdokimov, A. V.; Filimonov, I. S.; Garcia, F. G.; Gaspero, M.; Giller, I.; Golovtsov, V. L.; Gouffon, P.; Gulmez, E.; He, K. L.; Iori, M.; Jun, S. Y.; Kaya, M.; Kilmer, J.; Kim, V. T.; Kochenda, L. M.; Konorov, I.; Kozhevnikov, A. P.; Krivshich, A. G.; Kruger, H.; Kubantsev, M. A.; Kubarovsky, V. P.; Kulyavtsev, A. I.; Kuropatkin, N. P.; Kurshetsov, V. F.; Kushnirenko, A.; Kwan, S.; Lach, J.; Lamberto, A.; Landsberg, L. G.; Larin, I.; Leikin, E. M.; Yunshan, L.; Luksys, M.; Lungov, T.; Maleev, V. P.; Mao, D.; Mao, C. S.; Mao, Z. L.; Mathew, P.; Matveev, V.; McCliment, E.; Moinester, M. A.; Molchanov, V. V.; Morelos, A.; Nelson, K. D.; Nemitkin, A. V.; Neoustroev, P. V.; Newsom, C.; Nilov, A. P.; Nurushev, S. B.; Ocherashvili, A.; Oliveira, E.; Onel, Y.; Ozel, E.; Ozkorucuklu, S.; Penzo, A.; Petrenko, S. V.; Pogodin, P.; Procario, M.; Prutskoi, V. A.; Ramberg, E.; Rappazzo, G. F.; Razmyslovich, B. V.; Rud, V. I.; Russ, J.; Schiavon, P.; Simon, J.; Sitnikov, A. I.; Skow, D.; Smith, V. J.; Srivastava, M.; Steiner, V.; Stepanov, V.; Stutte, L.; Svoiski, M.; Terentyev, N. K.; Thomas, G. P.; Uvarov, L. N.; Vasiliev, A. N.; Vavilov, D. V.; Verebryusov, V. S.; Victorov, V. A.; Vishnyakov, V. E.; Vorobyov, A. A.; Vorwalter, K.; You, J.; Zhao, W. H.; Zheng, S. C.; Zukanovich-Funchal, R.

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First observation of the doubly charmed baryon Xi(+)(cc)

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Dersch, U.
Prof. Bogdan Povh, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Engelfried, J.
Prof. Bogdan Povh, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Eschrich, I.
Prof. Bogdan Povh, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Konorov, I.
Prof. Bogdan Povh, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Kruger, H.
Ralf Srama - Heidelberg Dust Group, Research Groups, MPI for Nuclear Physics, Max Planck Society;

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Vorwalter, K.
Prof. Bogdan Povh, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Citation

Mattson, M., Alkhazov, G., Atamantchouk, A. G., Balatz, M. Y., Bondar, N. F., Cooper, P. S., et al. (2002). First observation of the doubly charmed baryon Xi(+)(cc). Physical Review Letters, 89(11): 112001, pp. 112001-112001.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-829D-1

Abstract

We observe a signal for the doubly charmed baryon Xi(cc)(+) in the charged decay mode Xi(cc)(+)-->Lambda(c)(+)K(-)pi(+) in data from SELEX, the charm hadroproduction experiment at Fermilab. We observe an excess of 15.9 events over an expected background of 6.1+/-0.5 events, a statistical significance of 6.3sigma. The observed mass of this state is 3519+/-1 MeV/c(2). The Gaussian mass width of this state is 3 MeV/c(2), consistent with resolution; its lifetime is less than 33 fs at 90% confidence.