Search for D{sup 0}-D-bar{sup 0} mixing using semileptonic decay modes
- Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France)
- Dipartimento di Fisica, Universita di Bari, and INFN, I-70126 Bari (Italy)
- Institute of High Energy Physics, Beijing 100039 (China)
- Institute of Physics, University of Bergen, N-5007 Bergen (Norway); and others
Based on an 87-fb{sup -1} data set collected by the BABAR detector at the PEP-II asymmetric-energy B Factory, a search for D{sup 0}-D-bar{sup 0} mixing has been made using the semileptonic decay modes D*{sup +}{yields}{pi}{sup +}D{sup 0}, D{sup 0}{yields}K{sup (}*{sup )}e{nu} (+c.c.). The use of these modes allows unambiguous flavor tagging and a combined fit of the D{sup 0} decay time and D*{sup +}-D{sup 0} mass difference ({delta}M) distributions. The high-statistics sample of unmixed semileptonic D{sup 0} decays is used to model the {delta}M distribution and time dependence of mixed events directly from the data. Neural networks are used to select events and reconstruct the D{sup 0}. A result consistent with no charm mixing has been obtained, R{sub mix}=0.0023{+-}0.0012{+-}0.0004. This corresponds to an upper limit of R{sub mix}<0.0042 (90% C.L.)
- OSTI ID:
- 20705560
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 70, Issue 9; Other Information: DOI: 10.1103/PhysRevD.70.091102; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Model-independent constraints on Δ F = 2 operators and the scale of new physics
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journal | March 2008 |
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