Newly observed X(4630): a new charmoniumlike molecule
Xin-Dian Yang, Fu-Lai Wang, Zhan-Wei Liu, Xiang Liu
Abstract
Abstract Very recently, the LHCb Collaboration at the Large Hadron Collider at CERN observed new resonance X (4630). The X (4630) is decoded as a charmoniumlike molecule with hidden-strange quantum number well in the one-boson-exchange mechanism. Especially, the study of its hidden-charmed decays explicitly shows the dominant role of $$J/\psi \phi $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>J</mml:mi> <mml:mo>/</mml:mo> <mml:mi>ψ</mml:mi> <mml:mi>ϕ</mml:mi> </mml:mrow> </mml:math> among all allowed hidden-charmed decays of the X (4630), which enforces the conclusion of X (4630) as a charmoniumlike molecule. The discovery of the X (4630) is a crucial step of constructing charmoniumlike molecule zoo.