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L. T. Handoko
Kelompok Fisika Teoritik dan Komputasi, Fisika LIPI Kompleks PUSPIPTEK Serpong, Tangerang 15310, Indonesia
Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

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Perturbative Calculation for the Heavy Meson Matrix Element L. T. Handoko
Indonesian Journal of Physics Vol 13 No 1 (2002): Vol. 13 No.1, Januari 2002
Publisher : Institut Teknologi Bandung

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Abstract

We argue that the perturbative approach can be used to compute non-factorizable corrections to exclusive radiative B meson decays in the heavy quark mass limit. The explicit computation of first order QCD corrections is given. These, or the so-called hard spectator, corrections is done up to %(αs) in the leading-twist approximation. These results are combined with the already done renormalization group effect in the appropriate Wilson coefficients, the vertex corrections and the annihilation contributions to obtain a complete %(αs) improvements to the lowest order decay width. The result is particularly applied to radiative decay B → ργ which the analysis is done for its branching ratio, isospin symmetry breaking and direct CP violation.
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