Long-Distance Contributions to $D^0-\\bar{D}^0$ Mixing Parameters
Journal
Physical Review
Journal Volume
D81
Pages
114020
Date Issued
2010-05
Author(s)
Cheng, Hai-Yang
Abstract
Long-distance contributions to the D0-D̄0 mixing parameters x and y are evaluated using latest data on hadronic D0 decays. In particular, we take on two-body D→PP and VP decays to evaluate the contributions of two-body intermediate states because they account for ∼50% of hadronic D0 decays. Use of the diagrammatic approach has been made to estimate yet-observed decay modes. We find that y is of order a few ×10-3 and x of order 10-3 from hadronic PP and VP modes. These are in good agreement with the latest direct measurement of D0-D̄0 mixing parameters using the D0→KSπ+π- and KSK+K - decays by BABAR. We estimate the contribution to y from the VV modes using the factorization model and comment on the single-particle resonance effects and contributions from other two-body modes involving even-parity states. © 2010 The American Physical Society.
Type
journal article