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Strange quark mass from sum rules with improved perturbative QCD convergence

Sebastian Bodenstein
(
- Cape Town U.
)
,
Cesareo A. Dominguez
(
- Cape Town U.
)
,
Karl Schilcher
(
- Cape Town U. and
- Mainz U., Inst. Phys.
)

2013

11 pages

Published in:

JHEP 07 (2013) 138

e-Print:

1305.3796 [hep-ph]

DOI:

10.1007/JHEP07(2013)138

PDG:

{\mathit {\mathit s}}

Report number:

UCT-TP-294-13,
MITP-13-026

View in:

reference search14 citations

Citations per year

Abstract: (Springer)

The strange quark mass is determined from a QCD Finite Energy Sum Rule (FESR) optimized to reduce considerably the systematic uncertainties arising from the hadronic resonance sector, as well as from the poor convergence of the pseudoscalar correlator in perturbative QCD. The former is achieved by introducing a suitable integration kernel in the Cauchy integral in the complex squared energy plane. The latter is obtained by optimizing the perturbative expansion to accelerate its convergence. The result for the strange quark mass in the scheme at a scale of 2 GeV is MeV.

Note:

A fourth integration kernel has been used

QCD Phenomenology
quark: mass
quantum chromodynamics: perturbation theory
correlation function: pseudoscalar
sum rule: finite energy
strangeness

References(25)

Figures(3)

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