42 citations · 131 across the 7 of their papers we have counts for
4 papers · 1 filter
QCD at Large Angle and Axion Cosmology
N. Evans, S. D. H. Hsu, A. Nyffeler +1
We use the chiral Lagrangian to investigate the global properties of the -flavor QCD vacuum as a function of the parameter. In the case of exact quark degeneracy we find evi…
Phase Transitions in Softly Broken N=2 SQCD at Non-zero Theta Angle
N. Evans, S. D. H. Hsu, M. Schwetz
We investigate the behavior of softly broken SQCD at non-zero bare theta angle , using superfield spurions to implement the SUSY breaking. We find a first-order phase tr…
Chiral Perturbation Theory, Large-N_c and the eta' Mass
N. Evans, S. D. H. Hsu, M. Schwetz
Using chiral perturbation theory and the large- expansion, we obtain expressions for the mass and mixing in terms of low-energy chiral Lagrangian parameters. This…
Topological Charge and Symmetry in the High Temperature Phase of QCD
N. Evans, S. D. H. Hsu, M. Schwetz
We discuss the global symmetries of the high temperature phase of QCD with massless quarks. We show that the symmetries are only violated by operators…