Chiral symmetry and charmonium decays to two pseudoscalars

Johan Bijnens, Ilaria Jemos

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Sammanfattning

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) -> PP. This result is true for all fully chiral singlet states of spin zero and two.
Originalspråkengelska
Artikelnummer137
TidskriftEuropean Physical Journal A. Hadrons and Nuclei
Volym47
Utgåva11
DOI
StatusPublished - 2011

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