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.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom