Ajihood

Thanks Diazona. I just wanted to double check that, as I have never seen an example of that occurring!

Also, since I have a c [tex]\rightarrow[/tex] u and W⁺ [tex]\rightarrow[/tex] u + anti-s I have two vertices for the decay D⁰ [tex]\rightarrow[/tex] K⁺ + [tex]\pi[/tex]^-. This means the total decay rate will depend on the square of the coupling constants g_cu and g_uanti-s multiplied togther.

But because of the CKM matrix g_cu = g_wsin[tex]\vartheta[/tex]_c and g_uanti-s = g_wsin[tex]\vartheta[/tex]_c. Where g_w is given to be 10^-5

So the total decay rate for D⁰ [tex]\rightarrow[/tex] K⁺ + [tex]\pi[/tex]^- ~ g²_cug²_uanti-s = (g_wsin[tex]\vartheta[/tex]_c)²

Is this right?

Thanks