Towards a Dynamical Understanding of the Non-DD¯Decay ofψ(3770)

Abstract

We investigate the psi(3770) non-DD decays into VP, where V and P denote vector and pseudoscalar mesons, respectively, via Okubo-Zweig-Iizuka-rule-evading intermediate meson rescatterings in an effective Lagrangian theory. By identifying the leading meson loop transitions and constraining the model parameters with the available experimental data for psi(3770)-->J/psieta, phieta, and rhopi, we succeed in making a quantitative prediction for all psi(3770)-->VP with BRVP from 0.41% to 0.64%. It indicates that the Okubo-Zweig-Iizuka-rule-evading long-range interactions play a role in psi(3770) strong decays, and could be a key towards a full understanding of the mysterious psi(3770) non-DD decay mechanism.

Novel analysis of the decaysψ′→hcπ0andηc′→χGuo1, Hanhart2, Li3 et al. 2010Phys. Rev. DSelf Cite548400View full textAdd to dashboardCite

“…As we will demonstrate the explicit calculation supports the scale arguments presented above, that heavy meson loops are highly suppressed for the reactions under consideration. We also checked that the results are consistent with a calculation using the ELA [2,6,7] -details will be presented elsewhere [28]. In Section IV, the results for the decay widths are given.…”

“…For instance, using an effective Lagrangian approach (ELA), the intermediate meson loop contributions are found to be essential for understanding the puzzling ψ(3770) non-DD decays [2,3]. They are also important in the J/ψ decays into a vector and a pseudoscalar mesons [4] and in the M 1 radiative transitions between two charmonia [5].…”

Improved measurements of χcJ→Σ+ΣAblikim1, Ачасов2, Ahmed3 et al. 2018Phys. Rev. D4140View full textAdd to dashboardCite

“…Contributions of the color octet mechanism (COM) [1] to decays of P-wave heavy quarkonia have been proposed for more than two decades, and many theoretical predictions for exclusive χ cJ decays to baryon anti-baryon pairs [2][3][4] have been made. However, there are large differences between predictions and the experimental measurements, e.g., the branching fractions (BF) of χ c0 → Σ þΣ− and Σ 0Σ0 decays as measured by CLEO-c [5] and BESIII [6] are observed to violate the helicity selection rule from perturbative QCD (pQCD) [7][8][9] and also do not agree with models based on the charm meson loop mechanism [3,10,11]. Further tests of the COM using more decay channels are thus an important input for the development of the theoretical models.…”

Effect of charmed meson loops on charmonium transitions

“…For instance, using an effective Lagrangian approach (ELA), intermediate heavy-meson loop contributions are found to be essential for understanding the puzzling ψ(3770) non-DD decays [11,12]. They are also important in the J/ψ decays into a vector and a pseudoscalar meson [13] and in the M 1 radiative transitions between two charmonia [14].…”