Renormalisation scale setting for D-mixing

mesons that are four orders of magnitude below the experimental determination. It is well known that this huge suppression results from severe GIM cancellations. We find that this mismatch can be solved by individually choosing the renormalisation scale of the different internal quark contributions. For

b

and

c

hadron lifetimes, as well as for the decay rate difference of neutral

B

mesons the effect of our scale setting procedure lies within the previously quoted theory uncertainties, while we get enlarged theory uncertainties for the semileptonic CP asymmetries in the

B

system.

scale: renormalization
meson: effect
hadron: lifetime
asymmetry: CP
decay rate
Glashow-Iliopoulos-Maiani model
heavy quark
suppression
quark

References(61)

Figures(0)

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