Accurate Bottom-Quark Mass from Borel QCD Sum Rules for the Decay Constants of B and Bs Mesons

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 m(b) and the B-meson decay constant f(B), namely, delta f(B)/f(B) approximate to -8 delta m(b)/m(b). This fact opens the possibility of an accurate sum-rule extraction of m(b) by using f(B) as input. Combining precise lattice QCD determinations of f(B) with our sum-rule analysis based on the three-loop O(alpha(2)(s)) heavy-light correlation function leads to (m) over bar (b)((m) over bar (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

Anzahl der Seiten

8

DOI

https://doi.org/10.22323/1.183.0048

Publikationsdatum

2013

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-the-decay-constants-of-b-and-bs-mesons(b2b7bb32-b8b2-4355-81fd-4b4f203123a6).html