Beneke, Martin and Buchalla, Gerhard and Greub, Christoph and Lenz, Alexander and Nierste, Ulrich (2002) The B+-B-d(0) lifetime difference beyond leading logarithms. NUCLEAR PHYSICS B, 639 (1-2). pp. 389-407. ISSN 0550-3213
Full text not available from this repository.Abstract
We compute perturbative QCD corrections to the lifetime splitting between the charged and neutral B meson in the framework of the heavy quark expansion. These next-to-leading logarithmic corrections are necessary for a meaningful use of hadronic matrix elements of local operators from lattice gauge theory. We find the uncertainties associated with the choices of renormalization scale and scheme significantly reduced compared to the leading-order result. We include the full dependence on the charm-quark mass m(o) without any approximations. Using hadronic matrix elements estimated in the literature with lattice QCD we obtain tau(B+)/tau(B-d(0)) = 1.053 +/- 0.016 +/- 0.017, where the effects of unquenching and 1/m(b) corrections are not yet included. The lifetime difference of heavy baryons Xi(b)(0) and Xi(b)(-) is also briefly discussed. (C) 2002 Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | INCLUSIVE DECAYS; WEAK DECAYS; QCD CORRECTIONS; BEAUTY HADRONS; REGULARIZATION; LATTICE; MESONS; ORDER; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Sep 2021 10:02 |
| Last Modified: | 01 Sep 2021 10:02 |
| URI: | https://pred.uni-regensburg.de/id/eprint/39877 |
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