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
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
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o prilogu
2003.
nije evidentirano
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