del Amo Sanchez, P. et al. (2010) Measurement of D^{0}-D[over ¯]^{0} Mixing Parameters Using D^{0}→K_{S}^{0}π^{+}π^{-} and D^{0}→K_{S}^{0}K^{+}K^{-} Decays. Physical Review Letters, 105 (8). 081803. ISSN 0031-9007

We report a direct measurement of D0-D̅ 0 mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D0→KS0π+π- and, for the first time, D0→KS0K+K- decays. The low-momentum pion πs+ in the decay D*+→D0πs+ 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.

Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email