from hybrid sum rule
نویسندگان
چکیده
منابع مشابه
φl̄ν from QCD sum rule
We calculate D+ s → φ transition form factors V , A0, A1 and A2, and study semileptonic decay of D+ s → φl̄ν based on QCD sum rule method. We compare our results of the ratios of V (0)/A1(0), A2(0)/A1(0), ΓL/ΓT , and the total decay branching ratio of D+ s → φl̄ν with experimental data, and find that they are consistent.
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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be...
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We present a QCD sum rule calculation of the spin-symmetry violating universal function χ2(v · v′), which appears at order 1/mQ in the heavy quark expansion of meson form factors. This function vanishes in the standard approximation, where radiative effects are neglected. For the first time, the complete set of diagrams arising at order αs is evaluated. In particular, we find χ2(1) = −(3.8± 0.4...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1994
ISSN: 0370-2693
DOI: 10.1016/0370-2693(94)90741-2