Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/131544
Title: | Measurement of D0−¯¯¯D0 mixing using the ratio of lifetimes for the decays D0→K−π+, K−K+, and π−π+ |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 23-Jul-2008 |
Publisher: | American Physical Society |
Abstract: | We present a measurement of D 0 − ¯¯¯ D 0 mixing parameters using the ratios of lifetimes extracted from a sample of D 0 mesons produced through the process D * + → D 0 π + , which decay to K − π + , K − K + , or π − π + . The lifetimes of the C P -even, Cabibbo-suppressed modes K − K + and π − π + are compared with that of the C P -mixed, Cabibbo-favored mode K − π + to obtain a measurement of y C P , which in the limit of C P conservation corresponds to the mixing parameter y . The analysis is based on a data sample of 384 fb − 1 collected by the BABAR detector at the PEP-II asymmetric-energy e + e − collider. We obtain y C P = [ 1.24 ± 0.39 ( stat ) ± 0.13 ( syst ) ] % , which is evidence for D 0 − ¯¯¯ D 0 mixing at the 3 σ level, and Δ Y = [ − 0.26 ± 0.36 ( stat ) ± 0.08 ( syst ) ] % , where Δ Y constrains possible C P violation. Combining this result with a previous BABAR measurement of y C P obtained from a separate sample of D 0 → K − K + events, we obtain y C P = [ 1.03 ± 0.33 ( stat ) ± 0.19 ( syst ) ] % . |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.78.011105 |
It is part of: | Physical Review D, 2008, vol. 78, num. 1, p. 011105 |
URI: | http://hdl.handle.net/2445/131544 |
Related resource: | https://doi.org/10.1103/PhysRevD.78.011105 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
577697.pdf | 317.21 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.