Prefer a chat interface with context about you and your work?
Angular distributions in<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:mo stretchy="false">(</mml:mo><mml:msup><mml:mi>ρ</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo>,</mml:mo><mml:mi>ω</mml:mi><mml:mo stretchy="false">)</mml:mo></mml:math>states near threshold
A resonance $X(3872)$, first observed in the decays $B\ensuremath{\rightarrow}KX$, has been seen to decay to $J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$. The ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ mass spectrum peaks near its kinematic upper limit, prompting speculation that the dipion system may be in a ${\ensuremath{\rho}}^{0}$. The decay $X(3872)\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\omega}$ also has been observed. The reaction $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ has been studied. …