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Complete O(alpha_s^2) Corrections to Zero-Recoil Sum Rules for B-->D* Transitions
High Energy Physics - Phenomenology · Submitted 10 Jun 1997
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We present the complete O(alpha_s^2) corrections to the Wilson coefficient of the unit operator in the zero-recoil sum rule for the B-->D* transition.
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The abstract, sentence by sentence
We present the complete O(alpha_s^2) corrections to the Wilson coefficient of the unit operator in the zero-recoil sum rule for the B-->D* transition. We include both perturbative and power-suppressed nonperturbative effects in a manner consistent with the operator product expansion. The impact of these corrections on |V_cb| extracted from semileptonic B-->D* decays near zero recoil is discussed. The mixing of the heavy quark kinetic operator with the unit operator at the two loop level is obtained. O(alpha_s) corrections to a number of power-suppressed operators are calculated.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We present the complete O(alpha_s^2) corrections to the Wilson coefficient of the unit operator in the zero-recoil sum rule for the B-->D* transition. | contribution 0.91 | 0.95 | 0.73 | asserted 1.00 |
| s1 | We include both perturbative and power-suppressed nonperturbative effects in a manner consistent with the operator product expansion. | method 0.84 | 0.92 | 0.07 | asserted 0.98 |
| s2 | The impact of these corrections on |V_cb| extracted from semileptonic B-->D* decays near zero recoil is discussed. | interpretation 0.90 | 0.65 | 0.26 | asserted 0.58 |
| s3 | The mixing of the heavy quark kinetic operator with the unit operator at the two loop level is obtained. | result 0.89 | 0.94 | 0.11 | asserted 1.00 |
| s4 | O(alpha_s) corrections to a number of power-suppressed operators are calculated. | result 0.60 | 0.93 | 0.07 | asserted 1.00 |
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Original abstract
We present the complete O(alpha_s^2) corrections to the Wilson coefficient of the unit operator in the zero-recoil sum rule for the B-->D* transition. We include both perturbative and power-suppressed nonperturbative effects in a manner consistent with the operator product expansion. The impact of these corrections on |V_cb| extracted from semileptonic B-->D* decays near zero recoil is discussed. The mixing of the heavy quark kinetic operator with the unit operator at the two loop level is obtained. O(alpha_s) corrections to a number of power-suppressed operators are calculated.
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How the literature uses it
2 arXiv papers cite this in 2 sentences
Papers citing it · 1 sentence without a confident label
Cites it as background 1 paper
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The ZRSR is well established for $B→D$ and $B→D^*$ transitions, with OPE contributions known up to order $α_s^2$ [ref] .
Testing lepton flavour universality in semileptonic $\Lambda_b \to \Lambda_c^*$ decays · Benchmarking the form factors' parameters from Zero Recoil Sum Rules · 0.80
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