Strong phases and D0-anti-D0 mixing parameters
Adam F. Falk, Yosef Nir, and Alexey A. Petrov
TL;DR
The paper discusses how large SU(3) violating resonance effects in D meson decays can significantly impact the extraction and interpretation of D0-anti-D0 mixing parameters, especially the strong phase and mass difference.
Contribution
It introduces the possibility that resonance contributions cause large strong phases, affecting the analysis of mixing parameters in D meson decays.
Findings
Resonance effects can induce large strong phases in D decays.
Large interference terms may be due to mass differences, not width differences.
SU(3) violation impacts the interpretation of mixing measurements.
Abstract
We argue that there could be large, SU(3) violating resonance contributions to D -> K pi decays which would affect the extraction of the D0-anti-D0 mixing parameters from experiment. Such contributions can induce a large strong phase in the interference between the doubly Cabibbo suppressed and the mixing induced Cabibbo favored contributions to the D0 -> K^+ pi^- and anti-D0 -> K^- pi^+ decays. Consequently, the interpretation of a large, CP conserving interference term can involve a large mass difference Delta M rather than a large width difference Delta Gamma.
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