SU(3) Breaking and D0-D0bar Mixing

Details SU(3) Breaking and D0-D0bar Mixing SU(3) Breaking and D0-D0bar Mixing

2001-10-24

arxiv.org/abs/hep-ph/0110317v2

Phys.Rev. D65 (2002) 054034

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages; minor corrections, version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.65.054034

The main challenge in the Standard Model calculation of the mass and width difference in the D0-D0bar system is to estimate the size of SU(3) breaking effects. We prove that D meson mixing occurs in the Standard Model only at second order in SU(3) violation. We consider the possibility that phase space effects may be the dominant source of SU(3) breaking. We find that y=(Delta Gamma)/(2Gamma) of the order of one percent is natural in the Standard Model, potentially reducing the sensitivity to new physics of measurements of D meson mixing.

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