Topology in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>S</mml:mi><mml:mi>U</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:msub><mml:mi>N</mml:mi><mml:mi>f</mml:mi></mml:msub><mml:mo stretchy="false">)</mml:mo></mml:math> chiral symmetry restored phase of unquenched QCD and axion cosmology
Physical review. D/Physical review. D.