%0 Journal Article %1 Chen2012Study %A Chen, Yun-Hua %A Guo, Zhi-Hui %A Zheng, Han-Qing %D 2012 %K eta %T Study of \eta-\eta' mixing from radiative decay processes %U http://arxiv.org/abs/1201.2135 %X We perform a thorough analysis of the VP\gamma(\gamma*) and P\gamma\gamma(\gamma*) decays in the resonance chiral theory, where V stand for the vector resonances \rho, K*, ømega, \phi, P stand for \pi, K, \eta, \eta' and \gamma* subsequently decays into lepton pairs. Upon imposing QCD short-distance constraints on resonance couplings, the -> \pi \gamma(\gamma*), -> \gamma(\gamma*), K^*0 -> K^0processes only depend on one free parameter and -> \gamma(\gamma*) can be completely predicted. The four mixing parameters of the \eta-\eta' system, i.e. two mixing angles þeta8, þeta0 and two decay constants F8, F0, are determined from radiative decays involving or \eta'. The higher order low energy constants of the pseudo-Goldstone Lagrangian in the chiral anomaly sector are predicted by integrating out heavy resonances. We also predict the decay widths of -> e^+ e^-, \eta' -> e^+ e^- and -> \eta \mu^+ \mu^-, which can be compared with the future measurement in these channels.

@article{Chen2012Study, abstract = {We perform a thorough analysis of the VP\gamma(\gamma*) and P\gamma\gamma(\gamma*) decays in the resonance chiral theory, where V stand for the vector resonances \rho, K*, \omega, \phi, P stand for \pi, K, \eta, \eta' and \gamma* subsequently decays into lepton pairs. Upon imposing QCD short-distance constraints on resonance couplings, the \omega -\> \pi \gamma(\gamma*), \rho -\> \pi \gamma(\gamma*), K^{*0} -\> K^0\gamma processes only depend on one free parameter and \pi -\> \gamma \gamma(\gamma*) can be completely predicted. The four mixing parameters of the \eta-\eta' system, i.e. two mixing angles \theta8, \theta0 and two decay constants F8, F0, are determined from radiative decays involving \eta or \eta'. The higher order low energy constants of the pseudo-Goldstone Lagrangian in the chiral anomaly sector are predicted by integrating out heavy resonances. We also predict the decay widths of \rho -\> \pi e^+ e^-, \eta' -\> \gamma e^+ e^- and \phi -\> \eta \mu^+ \mu^-, which can be compared with the future measurement in these channels.}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {Chen, Yun-Hua and Guo, Zhi-Hui and Zheng, Han-Qing}, biburl = {https://www.bibsonomy.org/bibtex/215acd894c018c2a7411b65fa1b34c33d/cmcneile}, citeulike-article-id = {10213408}, citeulike-linkout-0 = {http://arxiv.org/abs/1201.2135}, citeulike-linkout-1 = {http://arxiv.org/pdf/1201.2135}, day = 10, eprint = {1201.2135}, interhash = {a4c535fb47a288e3db45a593e1bbf33c}, intrahash = {15acd894c018c2a7411b65fa1b34c33d}, keywords = {eta}, month = jan, posted-at = {2012-01-11 08:46:33}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{Study of \eta-\eta' mixing from radiative decay processes}}, url = {http://arxiv.org/abs/1201.2135}, year = 2012 }