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arXiv · 1109.5033

Chiral Symmetry and Charmonium Decays to Two Pseudoscalars

Johan Bijnens·Ilaria Jemos
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Abstract

We apply hard pion Chiral Perturbation Theory to charmonium decays to $\pi\pi$, $KK$ and $\eta\eta$. We first discuss why we expect to be able to provide results for the chiral logarithms in $\chi_{c0}$ and $\chi_{c2}$ decays to two pseudoscalars while for the decays from $J/\psi$, $\psi(nS)$ and $\chi_{c1}$ no simple prediction is possible. The leading chiral logarithm turns out to be absent for $\chi_{c0},\chi_{c2}\to PP$. This result is true for all fully chiral singlet states of spin zero and two.

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Johan Bijnens, Ilaria Jemos. 2011-09-23. Chiral Symmetry and Charmonium Decays to Two Pseudoscalars. https://doi.org/10.1140/epja%2Fi2011-11137-9

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