Observation of a Charmed Baryon Decaying to D{sup 0}p at a Mass Near 2.94 GeV/c{sup 2}
- Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France)
- Universitat de Barcelona, Facultat de Fisica Dept. ECM, E-08028 Barcelona (Spain)
- Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
- Institute of High Energy Physics, Beijing 100039 (China)
- University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
A search for charmed baryons decaying to D{sup 0}p reveals two states: the {lambda}{sub c}(2880){sup +} baryon and a previously unobserved state at a mass of [2939.8{+-}1.3(stat){+-}1.0(syst)] MeV/c{sup 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{sup -}{pi}{sup +} and K{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup +} decay modes of the D{sup 0} in 287 fb{sup -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{sup +}p spectrum of doubly charged partners. The mass and intrinsic width of the {lambda}{sub c}(2880){sup +} baryon and relative yield of the two baryons are also measured.
- OSTI ID:
- 20861575
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 1; Other Information: DOI: 10.1103/PhysRevLett.98.012001; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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