We review the landscape of QCD axion models. Theoretical constructions that extend the
window for the axion mass and couplings beyond conventional regions are highlighted and …

In this paper we survey methods by which supersymmetry (or other new physics) could be
observed in experiments at present and future accelerators. We review some of the …

The Quantum Theory of Fields, first published in 1996, is a self-contained, comprehensive
introduction to quantum field theory from Nobel Laureate Steven Weinberg. Volume II gives …

It is pointed out that a global U (1) symmetry, that has been introduced in order to preserve
the parity and time-reversal invariance of strong interactions despite the effects of instantons …

The requirement that P and T be approximately conserved in the color gauge theory of
strong interactions without arbitrary adjustment of parameters is analyzed. Several …

Abstract When the Standard Model is considered as an effective low-energy theory, higher
dimensional interaction terms appear in the Lagrangian. Dimension-six terms have been …

We elaborate on an earlier discussion of CP conservation of strong interactions which
includes the effect of pseudoparticles. We discuss what happens in theories of the quantum …

A systematic study is made of the non-perturbative effects in quantum chromodynamics. The
basic object is the two-point functions of various currents. At large Euclidean momenta q the …

We identify a new cosmological problem for models which solve the strong CP puzzle with
an invisible axion, unrelated to the domain wall problem. Because the axion is very weakly …

Volume 104B, number 3 PHYSICS LETTERS 27 August 1981 A SIMPLE SOLUTION TO THE
STRONG CP PROBLEM WITH A HARMLESS AXION Michael DI Page 1 Volume 104B, number …