mass difference from a dispersion relation
نویسندگان
چکیده
We study the Standard Model prediction for the mass difference between the two neutral D meson mass eigenstates, ∆m. We derive a dispersion relation based on heavy quark effective theory that relates ∆m to an integral of the width difference of heavy mesons, ∆Γ, over varying values of the heavy meson mass. Modeling the mD-dependence of certain D decay partial widths, we investigate the effects of SU(3) breaking from phase space on the mass difference. We find that ∆m may be comparable in magnitude to ∆Γ in the Standard Model. Work supported in part by the Department of Energy contract DE-AC03-76SF00515.
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