Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-05-29
AIP Conf.Proc. 618 (2002) 298-309
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages; Talk given at the XXXVIIth Rencontres de Moriond, Electroweak Interactions and Unified Theories, Les Arcs, March 9-16
Scientific paper
10.1063/1.1478849
The main challenge in the Standard Model calculation of the mass and width difference in $D^0 - \bar D^0$ mixing is to estimate the size of SU(3) breaking. We prove that mixing occurs in the Standard Model only at second order in SU(3) violation. We calculate SU(3) breaking due to phase space effects, and find that it can naturally give rise to a width difference $\Delta\Gamma / 2\Gamma \sim 1%$, potentially reducing the sensitivity of D mixing to new physics.
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