B -> K eta' decay as unique probe of eta' meson
Igor Halperin, Ariel Zhitnitsky
Abstract
A theory of the B -> K η' decay is proposed. It is based on the Cabbibo favored b -> c c s process followed by a direct materialization of the c c pair into the η'. This mechanism works due to a non-valence Zweig rule violating c-quark component of the η', which is unique to its very special nature. This non-perturbative "intrinsic charm" content of the η' is evaluated using the Operator Product Expansion and QCD low energy theorems. Our results are consistent with an unexpectedly large Br(B -> K η') 7.8 · 10-5 recently announced by CLEO.
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