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Título: | Measurement of D-0-(D)over-bar(0) Mixing Parameters Using D-0 -> K-S(0)pi(+) pi(-) and D-0 -> (KSK+K-)-K-0 Decays |
Autor: | Babar Collaboration; López-March, Neus CSIC; Martínez-Vidal, Fernando CSIC ORCID; Milanés, Diego A. CSIC ORCID; Oyanguren, Arantza CSIC ORCID; Lees, J. P.; Sánchez, P. D. | Fecha de publicación: | 19-ago-2010 | Editor: | American Physical Society | Citación: | Physical Review Letters 105 (8): 081803 (2010) | Resumen: | We report a direct measurement of D-0-(D) over bar (0) mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D-0 -> K-S(0)pi(+)pi(-) and, for the first time, D-0 -> (KSK+K-)-K-0 decays. The low-momentum pion pi(+)(s) in the decay D*(+) -> D-0 pi(+)(s) identifies the flavor of the neutral D meson at its production. Using 468.5 fb(-1) of e(+)e(-) colliding-beam data recorded near root s = 10.6 by the BABAR detector at the PEP-II asymmetric-energy collider at SLAC, we measure the mixing parameters x = [1.6 + 2.3(stat) +/- 1.2(syst) +/- 0.8(model)] X 10(-3), and y = [5.7 +/- 2.0(stat) +/- 1.3(syst) +/- 0.7(model)] X 10(-3). These results provide the best measurement to date of x and y. The knowledge of the value of x, in particular, is crucial for understanding the origin of mixing. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.105.081803 | URI: | http://hdl.handle.net/10261/27711 | DOI: | 10.1103/PhysRevLett.105.081803 | ISSN: | 0031-9007 |
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measurement of DO-Babar.pdf | 670,93 kB | Adobe PDF | Visualizar/Abrir |
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