Do near-threshold molecular states mix with neighboring <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mover accent="true"><mml:mi>Q</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mi>Q</mml:mi></mml:math> states?
Physical review. D/Physical review. D.