Charm Mass Determination from QCD Sum Rules at O(alpha(3)(s))

Autor(en)

Bahman Dehnadi, André H. Hoang, Vicent Mateu, Seyyed Mojtaba Zebarjad

Abstrakt

We report on a new determination of the (MS) over bar charm quark mass from charmonium sum rules using perturbative QCD input at O(alpha(3)(s)). We establish two improvements over corresponding previous analyses: (i) all available experimental data for the hadronic R-ratio up to root s = 10.538 GeV are included for the experimental moments and (ii) a detailed analysis of perturbative uncertainties (due to the truncation of the perturbative series) is carried out. Issue (i) avoids having to rely on theoretical model input in the data region 4.8 GeV <root s <10.538 GeV and (ii) is crucial for a reliable estimate of the error. Our final result [1] is (m) over bar (c)((m) over bar (c)) = 1.277 +/- 0.026 GeV, with an error twice as large than the one obtained in Ref. [2, 3].

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Shiraz University, Massachusetts Institute of Technology, Spanish National Research Council (CSIC)

Seiten

628-630

Anzahl der Seiten

3

DOI

https://doi.org/10.1063/1.3700637

Publikationsdatum

2012

ÖFOS 2012

103034 Teilchenphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/0c45765a-05ac-4b3d-ba15-b3f777e40c7a