Matrix elements of four-quark operators relevant to life time difference Delta Gamma(Bs) from QCD sum rules

Authors
Huang, CS Zhang, AL Zhu, SL
Citation
Cs. Huang et al., Matrix elements of four-quark operators relevant to life time difference Delta Gamma(Bs) from QCD sum rules, EUR PHY J C, 21(2), 2001, pp. 313-318
Citations number
23
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
14346044 → ACNP
Volume
21
Issue
2
Year of publication
2001
Pages
313 - 318
Database
ISI
SICI code
1434-6044(200106)21:2<313:MEOFOR>2.0.ZU;2-K
Abstract
We extract the matrix elements of four-quark operators O-L,O-S relevant to the B-s and (B) over bar (s) life time difference from QCD sum rules. We fi nd that the vacuum saturation approximation works reasonably well, i.e., wi thin 10%. We discuss the implications of our results and compare them with a recent lattice QCD determination.