Nuclear Theory Seminar
Wednesday, Sep. 14th, 2011
2:30pm, Room C-421
Title: Constituent Picture of Hadrons in QCD and Reinterpretation
of Gluon Condensate
Speaker: Stanislaw D. Glazek (University of Warsaw)
Abstract:
Hypothesis of quark binding through condensation of gluons inside
hadrons is formulated using a renormalization group procedure for
effective particles in light-front Hamiltonian approach to QCD.
At momentum scales of relative motion of hadronic constituents that
are comparable with $\Lambda_{QCD}$, the hypothetical boost-invariant
constituent dynamics is identified using gauge symmetry.
When viewed in a hadron rest frame, the resulting picture of mesons
and baryons closely resembles constituent quark models with harmonic
oscillator potentials, whose strength is given by the gluon condensate
inside hadrons rather than in the vacuum, but with the same numerical
value. The hypothetical picture significantly differs from the
constituent models, or sum rules, by the option of a systematic
renormalization group analysis within the light-front approach to
QCD.