Naslov
B -> pi pi hadronic amplitudes from QCD light-cone sum rules

Autori
Khodjamirian, Aleksander ; Mannel, Thomas ; Melcher, Martin ; Melić, Blaženka

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
EPS International Europhysics Conference on High Energy Physics (HEP-EPS 2005), Lisbon, Portugal, PoS HEP2005:194, 2006. / Barreira, G - Trst : SISSA, 2006, 194-198

Skup
EPS International Europhysics Conference on High Energy Physics (HEP-EPS 2005), Lisbon, Portugal, 21-27 Jul 2005

Mjesto i datum
Lisabon, Portugal, 21.07.2005. - 27.07.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
B decays

Sažetak
We analyse B->pi pi decays, obtaining the relevant hadronic amplitudes from QCD light-cone sum rules (LCSR). In this approach the B-> pi pi hadronic matrix elements with annihilation topology are finite and turn out to be small with respect to the factorizable amplitude. The pattern of B -> pi pi amplitudes obtained from LCSR, including emission, penguin and annihilation effects, does not reveal significant deviations from naive factorization and agrees with the predictions of QCD factorization if the latter approach is taken with moderate values of the annihilation parameters. We find a substantial discrepancy between our predictions and the current data for B -> pi+ pi− and B -> p0 p0 indicating a missing piece of deltaI = 1/2 transition amplitude

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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