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Annihilation effects in B -> pi pi from QCD light-cone sum rules (CROSBI ID 117306)

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Khodjamirian, Alexander ; Mannel, Thomas ; Melcher, M. ; Melić, Blaženka Annihilation effects in B -> pi pi from QCD light-cone sum rules // Physical review. D, Particles, fields, gravitation, and cosmology, 72 (2005), 9; 094012, 20. doi: 10.1103/PhysRevD.72.094012

Podaci o odgovornosti

Khodjamirian, Alexander ; Mannel, Thomas ; Melcher, M. ; Melić, Blaženka

engleski

Annihilation effects in B -> pi pi from QCD light-cone sum rules

Using the method of QCD light-cone sum rules, we calculate the $B \to \pi\pi$ hadronic matrix elements with annihilation topology. We obtain a finite result, including the related strong phase. Numerically, the annihilation effects in $B\to \pi\pi$ turn out to be small with respect to the factorizable emission mechanism. Our predictions, together with the earlier sum rule estimates of emission and penguin contributions, are used for the phenomenological analysis of $B\to \pi\pi$ channels. We predict a $\Delta I=1/2$ transition amplitude which significantly differs from this amplitude extracted from the current data.

QCD ; annihilation

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Podaci o izdanju

72 (9)

2005.

094012

20

objavljeno

1550-7998

1550-2368

10.1103/PhysRevD.72.094012

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Fizika

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