A two-component picture of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mo stretchy="false">〈</mml:mo><mml:msubsup><mml:mi>A</mml:mi><mml:mi>μ</mml:mi><mml:mn>2</mml:mn></mml:msubsup><mml:mo stretchy="false">〉</mml:mo></mml:math> condensate with instantons
Physics letters. B