|Head of the research group:|
|Institution:||Austrian Academy of Sciences|
|Organizational unit:||Institut für Hochenergiephysik (HEPHY)|
|Street address:||Nikolsdorfer Gasse 18|
|Assignments to Research Areas:|
- High Energy Physics
- Nuclear and Particle Physics
- Theoretical Physics
|Assignments to Fields of Work According to the Austrian System of Science Areas:|
|Field(s) of work:|
- High energy physics (103012)
- Particle physics (103034)
- Theoretical physics (103036)
|Date of the data acquisition:||31.05.2012|
|Data acquisition period:||from: 2007 up to including: 2011|
|Research Group at the Time of the Data Acquisition:|
|Scientific group members:|
|Scientific Output in the Above Data Acquisition Period:|
|H-index of the group head:||23|
|Number of publications:||31|
|Five most important publications:|
- W. Lucha, D. Melikhov, and S. Simula, "Decay Constants of Heavy Pseudoscalar Mesons from QCD Sum Rules", J. Phys. G: Nucl. Part. Phys. 38 (2011) 105002.
- W. Lucha, D. Melikhov, and S. Simula, "Effective Continuum Threshold in Dispersive Sum Rules",
Phys. Rev. D 79 (2009) 096011.
- R. L. Hall and W. Lucha, "Semirelativistic Stability of N-Boson Systems Bound by 1/rij Pair Potentials",
J. Phys. A: Math. Theor. 41 (2008) 355202.
- Z.-F. Li, W. Lucha, and F. F. Schöberl, "Stability in the Instantaneous Bethe-Salpeter Formalism: Harmonic-Oscillator Reduced Salpeter Equation", Phys. Rev. D 76 (2007) 125028.
- W. Lucha, D. Melikhov, and S. Simula, "Heavy-to-Light Form Factors: Sum Rules on the Light Cone and Beyond", Phys. Rev. D 75 (2007) 096002.
|Five most important talks:|
- D. Melikhov, "Decay constants of heavy mesons from QCD sum rules",
ICHEP 2010, Paris, France (Jul 22-28, 2010).
- D. Melikhov, "Systematic errors of transition form factors extracted by means of light-cone sum rules", XII International Conference on Hadron Spectroscopy - Hadron 07, LNF, Frascati, Italy ( Oct 8-13, 2007).
- D. Melikhov, "Systematic errors of bound-state parameters obtained with SVZ sum rules",
QCD@WORK 2007: International Workshop on Quantum Chromodynamics: Theory and Experiment,
Martina Franca, Italy (Jun 16-20, 2007).
|Projects and Funding Granted in the Above Data Acquisition Period:|
Nonperturbative QCD in Heavy-Quark Systems
01. 05. 2005 - 16. 04. 2008
Beauty and Charm Hadrons and Their Decays
01. 01. 2008 - 31. 12. 2010
Hadron Properties from QCD Sum Rules
01. 01. 2011 - 31. 12. 2012
|Current research topics:|
- Relativistic Bound-State Equations:
Goal: quantum-field-theoretic description of (primarily hadronic) bound states by various simplifications of the Bethe-Salpeter formalism - such as the instantaneous approximation yielding generalized versions of the Salpeter equation. Here, a longstanding issue is the correct implementation of confinement.
- QCD Sum Rules:
The idea behind the QCD sum-rule approach is to provide analytic translations of QCD results obtained from the fundamental degrees of freedom (quarks and gluons) to the experimentally accessible hadronic bound states. We are constructing a new and improved sum-rule formalism that should yield both more accurate predictions and reliable error estimates.
- Exact Bounds for Semirelativistic Systems:
Goal: derivation of mathematically rigorous and to the utmost conceivable extent (semi-) analytic statements about various physical systems described by (semi-) relativistic equations of motion. For instance, having exact bounds to energy levels at one´s disposal allows for an unambiguous assessment of the validity of models.
|Future topics (next 5 years):|
- QCD bound states
- Hadron phenomenology
- Quark-gluon plasma
|Teaching and Research Mobility in the Above Data Acquisition Period:|
- Relativistic Bound-State Equations (collaboration with 5 institutions)
- QCD Sum Rules (collaboration with 5 institutions)
- Exact Bounds (collaboration with 1 institution)