Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-08-28
Nucl.Phys.Proc.Suppl.186:133-136,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
In Memoriam: Giuseppe (Beppe) Nardulli, Jan Stern, and Francisco (Paco) Yndurain. Invited talk given by C.A. Dominguez at QCD-
Scientific paper
10.1016/j.nuclphysbps.2008.12.03
The light quark masses are determined using a new QCD Finite Energy Sum Rule (FESR) in the pseudoscalar channel. This FESR involves an integration kernel designed to reduce considerably the contribution of the (unmeasured) hadronic resonance spectral functions. The QCD sector of the FESR includes perturbative QCD (PQCD) to five loop order, and the leading non-perturbative terms. In the hadronic sector the dominant contribution is from the pseudoscalar meson pole. Using Contour Improved Perturbation Theory (CIPT) the results for the quark masses at a scale of 2 GeV are $m_u(Q= 2 {GeV}) = 2.9 \pm 0.2 {MeV}$, $m_d(Q= 2 {GeV}) = 5.3 \pm 0.4 {MeV}$, and $m_s(Q= 2 {GeV}) = 102 \pm 8 {MeV}$, for $\Lambda = 381 \pm 16 {MeV}$, corresponding to $\alpha_s(M_\tau^2) = 0.344 \pm0.009$. In this framework the systematic uncertainty in the quark masses from the unmeasured hadronic resonance spectral function amounts to less than 2 - 3 %. The remaining uncertainties above arise from those in $\Lambda$, the unknown six-loop PQCD contribution, and the gluon condensate, which are all potentially subject to improvement.
Dominguez Cesareo A.
Nasrallah Nasrallah F.
Schilcher Röntsch R. K.
No associations
LandOfFree
Light quark masses from QCD sum rules with minimal hadronic bias does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Light quark masses from QCD sum rules with minimal hadronic bias, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light quark masses from QCD sum rules with minimal hadronic bias will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-327412