Abstract
We discuss the use of light-front field theory in the descriptions of hadrons. In particular, we clarify the confusion in the prevailing notion of the equivalence between the infinite momentum frame and the light-front dynamics and the advantage of the light-front dynamics in hadron physics. As an application, we present our recent work on the flavor asymmetry in the proton sea and identify the presence of the delta-function contributions associated with end-point singularities arising from the chiral effective theory calculation. The results pave the way for phenomenological applications of pion cloud models that are manifestly consistent with the chiral symmetry properties of QCD.
Highlights
We discuss the use of light-front field theory in the descriptions of hadrons
The interpolation method that we apply for the scattering amplitude was instrumental to observe the dramatic change of the longitudinal boost’s character from dynamic in instant form dynamics (IFD) to kinematic in light-front dynamics (LFD)
Maximizing the number of kinematic generators in LFD is a great advantage in saving dynamic efforts to obtain the quantum chromodynamics (QCD) solutions that reflect the full Poincaré symmetries
Summary
Cannot be larger than seven, i.e. the LFD has this maximum number of kinematic generators. The LFD maximizes the capacity to save dynamical efforts in obtaining the QCD solutions that reflect the full Poincaré symmetries. In this presentation, we discuss this remarkable advantage of the LFD in hadron physics and exemplify it in the study of the flavor asymmetry in the proton sea
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