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Evading the CKM Hierarchy
Author(s) -
Stanley J. Brodsky
Publication year - 2001
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/787219
Subject(s) - physics , particle physics , charm (quantum number) , hadron , b meson , meson , light cone , bar (unit) , nuclear physics , charm quark , wave function , amplitude , tree (set theory) , atomic physics , quantum mechanics , meteorology , mathematical analysis , mathematics
We show that the presence of intrinsic charm in the hadrons' light-cone wave functions, even at a few percent level, provides new, competitive decay mechanisms for B decays which are nominally CKM-suppressed. For example, the weak decays of the B-meson to two-body exclusive states consisting of strange plus light hadrons, such as B {yields} {pi} K, are expected to be dominated by penguin contributions since the tree-level b {yields} s u{bar u} decay is CKM suppressed However, higher Fock states in the B wave function containing charm quark pairs can mediate the decay via a CKM-favored b {yields} s c{bar c} tree-level transition. Such intrinsic charm contributions can be phenomenologically significant. Since they mimic the amplitude structure of ''charming'' penguin contributions, charming penguins need not be penguins at all.

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