Publications [#309539] of Seog Oh

Papers Published

1. Abulencia; A; others, Measurement of the dipion mass spectrum in X(3872) --> J/psi pi+ pi- decays, Phys. Rev. Lett., vol. 96 no. 10 (2006), pp. 102002 [doi]
   (last updated on 2026/01/20)

   Abstract:
   We measure the dipion mass spectrum in X(3872) --> J/psi pi++ pi+- decays using 360 pb-1 of p anti-p collisions at s**(1/2) = 1.96 TeV collected with the CDF II detector. The spectrum is fit with predictions for odd C-parity (3S_1, 1P_1, and 3D_J) charmonia decaying to J/psi pi++ pi+-, as well as even C-parity states in which the pi+ons are from rho0 decay. The latter case also encompasses exotic interpretations, such as D0 D-bar*0 molecule. Only the 3S_1 and J/psi rho hypotheses are compatible with our data. Since 3S_1 is untenable on other grounds, decay via J/psi rho is favored, which implies C = +1 for the X(3872). Models for different J/psi-rho angular momenta L are considered. Flexibility in the models, especially the introduction of rho-omega interference, enable good descriptions of our data for both L = 0 and 1.