QUARK MASSES IN QCD: A PROGRESS REPORT
| Autor: | Cesareo A. Dominguez |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Quark
Quantum chromodynamics Physics Nuclear and High Energy Physics QCD sum rules Particle physics High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) High Energy Physics::Phenomenology FOS: Physical sciences General Physics and Astronomy Astronomy and Astrophysics Resonance (particle physics) High Energy Physics - Experiment Pseudoscalar High Energy Physics - Phenomenology High Energy Physics - Experiment (hep-ex) High Energy Physics - Lattice High Energy Physics - Phenomenology (hep-ph) High Energy Physics::Experiment Operator product expansion Sum rule in quantum mechanics Charm (quantum number) |
| Zdroj: | Modern Physics Letters A. 26:691-710 |
| ISSN: | 1793-6632 0217-7323 |
| Popis: | Recent progress on QCD sum rule determinations of the light and heavy quark masses is reported. In the light quark sector a major breakthrough has been made recently in connection with the historical systematic uncertainties due to a lack of experimental information on the pseudoscalar resonance spectral functions. It is now possible to suppress this contribution to the 1% level by using suitable integration kernels in Finite Energy QCD sum rules. This allows to determine the up-, down-, and strange-quark masses with an unprecedented precision of some 8-10%. Further reduction of this uncertainty will be possible with improved accuracy in the strong coupling, now the main source of error. In the heavy quark sector, the availability of experimental data in the vector channel, and the use of suitable multipurpose integration kernels allows to increase the accuracy of the charm- and bottom-quarks masses to the 1% level. Comment: Invited review paper to be published in Modern Physics Letters A |
| Databáze: | OpenAIRE |
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