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Research Group "HEPHY - Forschungsprojekt Theory QCD"
(Univ.-Doz. Dr. Wolfgang Lucha)

Head of the research group:
Last name:Lucha
First name(s):Wolfgang
Title (leading):Univ.-Doz. Dr.
Institution:Austrian Academy of Sciences
Organizational unit:Institut für Hochenergiephysik (HEPHY)
Street address:Nikolsdorfer Gasse 18
Postal code:1050
Assignments to Research Areas:
Research area(s):
  • 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)
Data Acquisition:
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:
2 Persons
Wolfgang Lucha
Dmitri Melikhov
Full-time equivalents:1.9
Percentage project-funded:50
Scientific Output in the Above Data Acquisition Period:
H-index of the group head:23
Number of publications:31
Five most important publications:
  1. 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.
  2. W. Lucha, D. Melikhov, and S. Simula, "Effective Continuum Threshold in Dispersive Sum Rules",
    Phys. Rev. D 79 (2009) 096011.
  3. 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.
  4. 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.
  5. 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:
  1. D. Melikhov, "Decay constants of heavy mesons from QCD sum rules",
    ICHEP 2010, Paris, France (Jul 22-28, 2010).
  2. 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).
  3. 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:
Competitive projects:
  • FWF:
    Nonperturbative QCD in Heavy-Quark Systems
    01. 05. 2005 - 16. 04. 2008
  • FWF:
    Beauty and Charm Hadrons and Their Decays
    01. 01. 2008 - 31. 12. 2010
  • FWF:
    Hadron Properties from QCD Sum Rules
    01. 01. 2011 - 31. 12. 2012
Research Topics:
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:
International networking:
  • Relativistic Bound-State Equations (collaboration with 5 institutions)
  • QCD Sum Rules (collaboration with 5 institutions)
  • Exact Bounds (collaboration with 1 institution)
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