Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical vertex mass generation and chiral symmetry breaking on the
  light-front   Naively, helicity flip amplitudes for fermions seem to vanish in the chiral
limit of light-front QCD, which would make it nearly impossible to generate a
small pion mass in this framework. Using a simple model, it is illustrated how
a large helicity flip amplitude is generated dynamically by summing over an
infinite number of Fock space components. While the kinetic mass is basically
generated by a zero-mode induced counter-term, the vertex mass is generated
dynamically by infinitesimally small, but nonzero, momenta. Implications for
the renormalization of light-front Hamiltonians for fermions are discussed.

16
The categories of this paper are: stat
3
The categories of this paper are: physics
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph