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Charming penguis in B -> pi pi from QCD light-cone sum rules


Khodjamrian, A.; Mannel, Th.; Melić, Blaženka
Charming penguis in B -> pi pi from QCD light-cone sum rules // Electronic Proceedings of the Second Workshop on the CKM Unitarity Triangle : eConf C0304052:WG409, 2003
Durham, Velika Britanija, 2003. (pozvano predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Charming penguis in B -> pi pi from QCD light-cone sum rules

Autori
Khodjamrian, A. ; Mannel, Th. ; Melić, Blaženka

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

Izvornik
Electronic Proceedings of the Second Workshop on the CKM Unitarity Triangle : eConf C0304052:WG409, 2003 / - , 2003

Skup
Workshop on the CKM Unitarity Triangle (2 ; 2003)

Mjesto i datum
Durham, Velika Britanija, 05-09.04.2003.

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
B decays; penguin operators; sum rules

Sažetak
We use QCD light-cone sum rules to examine the B -> pi pi hadronic matrix element of the current-current operator with c quarks in the penguin topology ("charming penguin") as a potential source of the substantial O(1/m_b) effects. Our results indicate that charming penguins do not generate sizable nonperturbative effects at finite m_b. The same is valid for the penguin contractions of the current-current operators with light quarks. The dominant penguin topology effects are predicted to be O(\alpha_s). Still, the nonperturbative effects at finite m_b can accumulate to a visible effect that is illustrated by calculating the CP-asymmetry in the B^0_d -> pi^+ pi^- decay.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
0098002

Ustanove
Institut "Ruđer Bošković", Zagreb

Autor s matičnim brojem:
Blaženka Melić, (181332)