%0 Generic %1 Escribano2012First %A Escribano, Rafel %D 2012 %K eta %T A first prediction of the electromagnetic rare decays \$\eta^\prime\to\pi^0\gamma\gamma\$ and \$\eta^\prime\to\eta\gamma\gamma\$ %U http://arxiv.org/abs/1207.5400 %X The branching ratio of the electromagnetic rare decays \$\eta\to\pi^0\gamma\gamma\$ and \$\eta^\prime(\pi^0,\eta)\gamma\gamma\$ are analysed in terms of scalar and vector meson exchange contributions using the frameworks of the Linear Sigma Model and Vector Meson Dominance, respectively. The measured \$\eta\to\pi^0\gamma\gamma\$ process serves as a test of our approach while the non yet measured \$\eta^\prime(\pi^0,\eta)\gamma\gamma\$ reactions are predicted for the first time. Our prediction for the \$\eta\to\pi^0\gamma\gamma\$ decay agrees with recent experimental reported values, thus supporting the validity of our framework. Therefore, our predictions for the \$\eta^\prime\to\pi^0\gamma\gamma\$ and \$\eta^\prime\to\eta\gamma\gamma\$ decays should be taken as a first indication of the possible values of the associated branching ratios. We hope these predictions to be interesting and useful for experiments such as KLOE-2, Crystal Ball, WASA, and BES-III where these processes are expected to be measured in the next future.

@misc{Escribano2012First, abstract = {{The branching ratio of the electromagnetic rare decays \$\eta\to\pi^0\gamma\gamma\$ and \$\eta^\prime\to (\pi^0,\eta)\gamma\gamma\$ are analysed in terms of scalar and vector meson exchange contributions using the frameworks of the Linear Sigma Model and Vector Meson Dominance, respectively. The measured \$\eta\to\pi^0\gamma\gamma\$ process serves as a test of our approach while the non yet measured \$\eta^\prime\to (\pi^0,\eta)\gamma\gamma\$ reactions are predicted for the first time. Our prediction for the \$\eta\to\pi^0\gamma\gamma\$ decay agrees with recent experimental reported values, thus supporting the validity of our framework. Therefore, our predictions for the \$\eta^\prime\to\pi^0\gamma\gamma\$ and \$\eta^\prime\to\eta\gamma\gamma\$ decays should be taken as a first indication of the possible values of the associated branching ratios. We hope these predictions to be interesting and useful for experiments such as KLOE-2, Crystal Ball, WASA, and BES-III where these processes are expected to be measured in the next future.}}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {Escribano, Rafel}, biburl = {https://www.bibsonomy.org/bibtex/22da01c607a192742f2984a9540abf493/cmcneile}, citeulike-article-id = {10922810}, citeulike-linkout-0 = {http://arxiv.org/abs/1207.5400}, citeulike-linkout-1 = {http://arxiv.org/pdf/1207.5400}, day = 23, eprint = {1207.5400}, interhash = {f60bf443a34393b1ccf5788c74ed6f82}, intrahash = {2da01c607a192742f2984a9540abf493}, keywords = {eta}, month = jul, posted-at = {2012-07-24 08:44:10}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{A first prediction of the electromagnetic rare decays \$\eta^\prime\to\pi^0\gamma\gamma\$ and \$\eta^\prime\to\eta\gamma\gamma\$}}, url = {http://arxiv.org/abs/1207.5400}, year = 2012 }