Observation of a Charmed Baryon Decaying to D0 P at a Mass Near 2.94 GeV/c2

B Aubert,R Barate,M Bona,D Boutigny,F Couderc,Y Karyotakis,J P Lees,V Poireau,V Tisserand,A Zghiche,E Grauges,A Palano,M Pappagallo, J C Chen,N D Qi,G Rong,P Wang,Y S Zhu,G Eigen,I Ofte,B Stugu,G S Abrams,M Battaglia,D N Brown, J Button-Schafer,R N Cahn,E Charles,C T Day, M S Gill, Y Groysman, R G Jacobsen, J A Kadyk, L T Kerth, Yu G Kolomensky, G Kukartsev, G Lynch,L M Mir,P J Oddone,T J Orimoto,M Pripstein,N A Roe,M T Ronan,W A Wenzel, M Barrett,K E Ford,T J Harrison,A J Hart,C M Hawkes,S E Morgan,A T Watson,K Goetzen,T Held,H Koch,B Lewandowski,M Pelizaeus,K Peters,T Schroeder,M Steinke,J T Boyd,J P Burke,W N Cottingham, D Walker,T Cuhadar-Donszelmann,B G Fulsom,C Hearty,N S Knecht,T S Mattison,J A McKenna,A Khan,P Kyberd,M Saleem,L Teodorescu,V E Blinov, A D Bukin,V P Druzhinin,V B Golubev,A P Onuchin,S I Serednyakov,Yu I Skovpen,E P Solodov,K Yu Todyshev,D S Best,M Bondioli,M Bruinsma,M Chao,S Curry,I Eschrich,D Kirkby,A J Lankford,P Lund,M Mandelkern,R K Mommsen,W Roethel,D P 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Physical Review Letters（2007）SCI 1区

Laboratoire de Physique des Particules

被引用199|浏览377

摘要

A search for charmed baryons decaying to D(0)p reveals two states: the Lambda(c)(2880)(+) baryon and a previously unobserved state at a mass of [2939.8 +/- 1.3(stat)+/- 1.0(syst)] MeV/c(2) and with an intrinsic width of [17.5 +/- 5.2(stat)+/- 5.9(syst)] MeV. Consistent and significant signals are observed for the K-pi(+) and K-pi(+)pi(-)pi(+) decay modes of the D-0 in 287 fb(-1) annihilation data recorded by the BABAR detector at a center-of-mass energy of 10.58 GeV. There is no evidence in the D(+)p spectrum of doubly charged partners. The mass and intrinsic width of the Lambda(c)(2880)(+) baryon and relative yield of the two baryons are also measured.

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baryons