Improved understanding of the peaking phenomenon existing in the new di- <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:math> invariant mass spectrum from the CMS Collaboration
Physical review. D/Physical review. D.