We consider techniques (based on an ultraviolet cutoff) used to prove that the pure boson (φ 4) 4 field theory is trivial and apply them instead to the dynamically generated quark-level linear sigma model. This cutoff approach leads to the conclusion that the latter field theory is in fact nontrivial. Owing to the recent observational identification [1] of a nonstrange scalar σ meson below 1 Ge...

Field theoretical approaches to nuclear dynamics are most promising for understanding the interplay of strong interactions and nuclear many-body dynamics. Such a program, allowing to calculate in-medium interactions ab initio from the free space baryon-baryon (BB) interactions is the aim of the Density Dependent Relativistic Hadron (DDRH) field theory. In DDRH theory we consider meson exchange ...

We consider heavy meson-antimeson pairs and their coupling to quarkonium in the context of nonrelativistic effective field theories (EFTs) incorporating adiabatic expansion. work out all leading order couplings obtain contributions masses widths quarkonia. match new potentials terms QCD. Using available lattice data for coupled system lowest lying pair, we extract mixing potential use it comput...

Many nucleon properties cannot be computed from first principles even though the fundamental theory that describes the strong interaction processes of hadrons, Quantum Chromodynamics (QCD), is well established. In QCD hadrons are composites of quarks and gluons whose interactions are described within the non– abelian gauge theory of color SU(3). However, perturbative techniques are not applicab...

Many nucleon properties cannot be computed from first principles even though the fundamental theory that describes the strong interaction processes of hadrons, Quantum Chromodynamics (QCD), is well established. In QCD hadrons are composites of quarks and gluons whose interactions are described within the non– abelian gauge theory of color SU(3). However, perturbative techniques are not applicab...