Theory of B → K(*)l+l- decays at high q2: OPE and quark-hadron duality

被引：140
作者：
Beylich, M. [1 ]
Buchalla, G. [1 ,2 ]
Feldmann, T. [3 ]
机构：
[1] Univ Munich, Fak Phys, Arnold Sommerfeld Ctr Theoret Phys, D-80333 Munich, Germany
[2] CERN, Div Theory, CH-1211 Geneva 23, Switzerland
[3] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany
来源：
EUROPEAN PHYSICAL JOURNAL C | 2011年 / 71卷 / 05期
关键词：
QCD FACTORIZATION; DIFFERENCE;
D O I：
10.1140/epjc/s10052-011-1635-0
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We develop a systematic framework for exclusive rare B decays of the type B -> K-(*())l(+)l(-) at large dilepton invariant mass q(2). It is based on an operator product expansion (OPE) for the required matrix elements of the nonleptonic weak Hamiltonian in this kinematic regime. Our treatment differs from previous work by a simplified operator basis, the explicit calculation of matrix elements of subleading operators, and by a quantitative estimate of duality violation. The latter point is discussed in detail, including the connection with the existence of an OPE and an illustration within a simple toy model.
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页码：1 / 20
页数：20
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