Accurate bottom-quark mass from Borel QCD sum rules for f(B) and f(Bs)
- Autor(en)
- Wolfgang Lucha, Dmitri Melikhov, Silvano Simula
- Abstrakt
We prove that Borel QCD sum rules for heavy–light currents yield very strong correlations between the b-quark mass mb and the B-meson decay constant fB, namely, δfB/fB≈−8δmb/mb. This fact opens the possibility of an accurate sum-rule extraction of mb by using fB as input. Combining precise lattice QCD determinations of fB with our sum-rule analysis based on the three-loop O(α2s) heavy–light correlation function leads to m¯¯¯b(m¯¯¯b)=(4.247±0.034) GeV.
- Organisation(en)
- Teilchenphysik
- Externe Organisation(en)
- Österreichische Akademie der Wissenschaften (ÖAW), Lomonosov Moscow State University (MSU), Istituto Nazionale di Fisica Nucleare (INFN), Roma
- Journal
- Physical Review D
- Band
- 88
- Anzahl der Seiten
- 10
- ISSN
- 1550-7998
- DOI
- https://doi.org/10.1103/PhysRevD.88.056011
- Publikationsdatum
- 09-2013
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103034 Teilchenphysik
- Schlagwörter
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/6f9636eb-0d54-4e18-8a12-a7c6ec7eb76a