On A Recent Claim Concerning $τ(D_s)/τ(D^0)$

Details On A Recent Claim Concerning $τ(D_s)/τ(D^0)$ On A Recent Claim Concerning $τ(D_s)/τ(D^0)$

2001-12-11

arxiv.org/abs/hep-ph/0112155v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

pages, no figure, 1 reference updated

Scientific paper

It has been suggested that the observed $D_s - D^0$ lifetime difference can be `understood' as due to $SU(3)_{Fl}$ breaking in the phase spaces for the exclusive $D^0$ and $D_s$ channels `removing' the need for weak annihilation. It is pointed out that several of the statements in this argument are misleading or even inconsistent with a state-of-the-art description of heavy flavour decays based on the operator product expansion.

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