caa a22 4500 445873299 CHVBK 20180317145519.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1140/epja/i2011-11137-9 doi (NATIONALLICENCE)springer-10.1140/epja/i2011-11137-9 Chiral symmetry and charmonium decays to two pseudoscalars [Elektronische Daten] [J. Bijnens, I. Jemos] We apply hard pion Chiral Perturbation Theory to charmonium decays to ππ, KK and ηη. We first discuss why we expect to be able to provide results for the chiral logarithms in χc0 and χc2 decays to two pseudoscalars while for the decays from J/ψ, ψ(nS) and χc1 no simple prediction is possible. The leading chiral logarithm turns out to be absent for χc0, χc2 → PP. This result is true for all fully chiral singlet states of spin zero and two. SIF, Springer-Verlag Berlin Heidelberg, 2011 Bijnens J. Department of Astronomy and Theoretical Physics, Lund University, Sölvegatan 14A, SE 223-62, Lund, Sweden aut Jemos I. Department of Astronomy and Theoretical Physics, Lund University, Sölvegatan 14A, SE 223-62, Lund, Sweden aut The European Physical Journal A Springer Berlin Heidelberg 47/11(2011-11-01), 1-5 1434-6001 47:11<1 2011 47 10050 https://doi.org/10.1140/epja/i2011-11137-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epja/i2011-11137-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bijnens J. Department of Astronomy and Theoretical Physics, Lund University, Sölvegatan 14A, SE 223-62, Lund, Sweden aut NATIONALLICENCE 700 1- Jemos I. Department of Astronomy and Theoretical Physics, Lund University, Sölvegatan 14A, SE 223-62, Lund, Sweden aut NATIONALLICENCE 773 0- The European Physical Journal A Springer Berlin Heidelberg 47/11(2011-11-01), 1-5 1434-6001 47:11<1 2011 47 10050 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer