Evidence for D{sup 0}-D{sup 0} Mixing
- Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
- Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
- Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
- University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
- Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
We present evidence for D{sup 0}-D{sup 0} mixing in D{sup 0}{yields}K{sup +}{pi}{sup -} decays from 384 fb{sup -1} of e{sup +}e{sup -} colliding-beam data recorded near {radical}(s)=10.6 GeV with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center. We find the mixing parameters x{sup '2}=[-0.22{+-}0.30(stat){+-}0.21(syst)]x10{sup -3} and y{sup '}=[9.7{+-}4.4(stat){+-}3.1(syst)]x10{sup -3} and a correlation between them of -0.95. This result is inconsistent with the no-mixing hypothesis with a significance of 3.9 standard deviations. We measure R{sub D}, the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates, to be [0.303{+-}0.016(stat){+-}0.010(syst)]%. We find no evidence for CP violation.
- OSTI ID:
- 20951390
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 21; Other Information: DOI: 10.1103/PhysRevLett.98.211802; (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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