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Charming penguis in B -> pi pi from QCD light-cone sum rules (CROSBI ID 491233)

Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija

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. 2003

Podaci o odgovornosti

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

engleski

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

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.

b decays; penguin operators; sum rules

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Podaci o prilogu

2003.

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objavljeno

Podaci o matičnoj publikaciji

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

Podaci o skupu

Workshop on the CKM Unitarity Triangle (2 ; 2003)

pozvano predavanje

05.04.2003-09.04.2003

Durham, Ujedinjeno Kraljevstvo

Povezanost rada

Fizika