Hadronic phases and isospin amplitudes in D(B) ---> pi pi and D(B) ---> K anti-K decays

Gerard, J.M.; Pestieau, J.; Weyers, J.

doi:10.1016/S0370-2693(98)00855-7

Hadronic phases and isospin amplitudes in D(B) ---> pi pi and D(B) ---> K anti-K decays

Mar, 1998

10 pages

Published in:

Phys.Lett.B 436 (1998) 363-368

e-Print:

hep-ph/9803328 [hep-ph]

DOI:

10.1016/S0370-2693(98)00855-7

Report number:

UCL-IPT-98-04

View in:

ADS Abstract Service

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Abstract:

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.

Note:

10pages,latex Report-no: UCL-IPT-98-04

B: hadronic decay
D: hadronic decay
isospin
decay: amplitude analysis
Regge poles
quark
D --> 2pi
D --> K anti-K
B --> 2pi
B --> K anti-K

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Figures(0)

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