New Dipole Penguin Contribution to K --> pi pi decays

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dc.creatorEeg, Jan O.
dc.creatorKumericki, Kresimir
dc.creatorPicek, Ivica
dc.date2008-03-14
dc.date2008-10-17
dc.date.accessioned2026-07-07T11:49:05Z
dc.date.available2026-07-07T11:49:05Z
dc.descriptionWe point out that the standard chromomagnetic penguin dipole operator has a counterpart corresponding to off-shell momenta for external quarks. By employing the chiral quark model, we show that this new dipole penguin operator has the same bosonisation as the standard Q_6 operator. Accordingly, this new operator enlarges by ~ 5 % the referent Q_6 contribution, which gives the dominant contribution to the CP-violating ratio epsilon'/epsilon and also gives an important contribution to the Delta I = 1/2 amplitude.
dc.description17 pages, 1 PS figure, LaTeX, corresponds to published version
dc.identifierhttps://arxiv.org/abs/0803.2106
dc.identifierhttp://arxiv.org/abs/0803.2106
dc.identifierPhys.Lett.B669:150-155,2008
dc.identifierdoi:10.1016/j.physletb.2008.09.039
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203114
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNew Dipole Penguin Contribution to K --> pi pi decays
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