Masses of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Q</mml:mi><mml:mi>Q</mml:mi><mml:mover accent="true"><mml:mi>Q</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover><mml:mover accent="true"><mml:mi>Q</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover></mml:math> tetraquarks in the relativistic diquark–antidiquark picture
Physical review. D/Physical review. D.