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), Universität Wien, 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://ucris.univie.ac.at/portal/de/publications/accurate-bottomquark-mass-from-borel-qcd-sum-rules-for-fb-and-fbs(6f9636eb-0d54-4e18-8a12-a7c6ec7eb76a).html