- #1
sunrah
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Homework Statement
Calculate following decay rate
[itex]\frac{\Gamma(D_{0} \rightarrow K^{-} \pi^{+})}{\Gamma(D_{0} \rightarrow \pi^{+} \pi^{-})}
[/itex]
Use the (Cabibbo–Kobayashi–Maskawa) CKM-matrix.
Homework Equations
The Attempt at a Solution
[itex]D^{0} = |cu\rangle , D^{+} = |cd\rangle , B^{0} = |bd\rangle , D_{s}^{+} = |cs\rangle , K^{-} = |su\rangle , π^{+} = |ud\rangle
[/itex]
I know only that in the numerator decay the charm quark couples with a strange quark, so the CKM matrix element Vcs would describe this decay? In the denominator decay d-quark couples with c-quark, so would this decay be described by CKM-matrix element Vcd?
EDITED:
Is then the ratio: [itex]\left(\frac{V_{cs}}{V_{cd}}\right)^{2} [/itex]
thank you
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