Hadronic phases and isospin amplitudes in D(B) ---> pi pi and D(B) ---> K anti-K decays
(1998) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. B436, p. 363-368 (1998)
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- (en) Hadronic phase in $\pi \pi$ and $K \bar K$ channels are calculated a la Regge. At the D mass one finds $\delta_{\pi \pi} \approx \pi/3$ and $\delta_{K \bar K} \approx -\pi/6$ in good agreement with the CLEO data while at the B mass these angles are predicted to be, respectively, $11^\circ$ and $-7^\circ$. With the hadronic phase $e^{i \delta_{K \bar K}}$ taken into account, a quark diagram decomposition of the isospin invariant amplitudes in $D \to K \bar K$ decays fits the data provided the exchange diagram contribution is about 1/3 of the tree level one. Comment: 10pages,latex
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Gérard, J.-M., Pestieau, J., & Weyers, J. (1998). Hadronic phases and isospin amplitudes in D(B) ---> pi pi and D(B) ---> K anti-K decays. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, B436, 363-368. https://doi.org/10.1016/S0370-2693(98)00855-7 (Original work published 1998)