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Title: | Measurement of D0−¯¯¯D0 Mixing Parameters Using D0→K0Sπ+π− and D0→K0SK+K− Decays |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 19-Aug-2010 |
Publisher: | American Physical Society |
Abstract: | We report a direct measurement of D 0 − ¯¯¯ D 0 mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D 0 → K 0 S π + π − and, for the first time, D 0 → K 0 S K + K − decays. The low-momentum pion π + s in the decay D * + → D 0 π + 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 √ s = 10.6 GeV 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 ) ] × 10 − 3 , and y = [ 5.7 ± 2.0 ( stat ) ± 1.3 ( syst ) ± 0.7 ( model ) ] × 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.105.081803 |
It is part of: | Physical Review Letters, 2010, vol. 105, num. 8, p. 081803 |
URI: | http://hdl.handle.net/2445/135277 |
Related resource: | https://doi.org/10.1103/PhysRevLett.105.081803 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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