First observation of the doubly charmed baryon Xi(+)(cc)
Date
2002Author
Dersch, U
Russ, J
Schiavon, P
Simon, J
Sitnikov, AI
Skow, D
Smith, VJ
Srivastava, M
Steiner, V
Stepanov, V
Stutte, L
Svoiski, M
Terentyev, NK
Thomas, GP
Uvarov, LN
Vasiliev, AN
Vavilov, DV
Verebryusov, VS
Victorov, VA
Vishnyakov, VE
Vorobyov, AA
Vorwalter, K
You, J
Zhao, WH
Zheng, SC
Zukanovich-Funchal, R
Ozkorucuklu, Suat
McCliment, E
Moinester, MA
Molchanov, VV
Morelos, A
Nelson, KD
Nemitkin, AV
Neoustroev, PV
Newsom, C
Nilov, AP
Nurushev, SB
Ocherashvili, A
Oliveira, E
Onel, Y
Ozel, E
Matveev, V
Mao, CS
Mao, ZL
Mathew, P
Mattson, M
Alkhazov, G
Atamantchouk, AG
Balatz, MY
Bondar, NF
Cooper, PS
Dauwe, LJ
Davidenko, GV
Dolgolenko, AG
Dzyubenko, GB
Edelstein, R
Emediato, L
Endler, AMF
Engelfried, J
Eschrich, I
Escobar, CO
Evdokimov, AV
Filimonov, IS
Garcia, FG
Gaspero, M
Giller, I
Golovtsov, VL
Gouffon, P
Gulmez, E
He, KL
Iori, M
Jun, SY
Kaya, M
Kilmer, J
Kim, VT
Kochenda, LM
Konorov, I
Kozhevnikov, AP
Krivshich, AG
Kruger, H
Kubantsev, MA
Kubarovsky, VP
Kulyavtsev, AI
Kuropatkin, NP
Kurshetsov, VF
Kushnirenko, A
Kwan, S
Lach, J
Lamberto, A
Landsberg, LG
Larin, I
Leikin, EM
Yunshan, L
Luksys, M
Lungov, T
Maleev, VP
Mao, D
Penzo, A
Petrenko, SV
Pogodin, P
Procario, M
Prutskoi, VA
Ramberg, E
Rappazzo, GF
Razmyslovich, BV
Rud, VI
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Show full item recordAbstract
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.
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