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$\eta^{'} \to \gamma \gamma$ and the topological susceptibility
The radiative decays $\eta'(\eta)\rta\gamma\gamma$ are discussed. The modifications of the conventional PCAC formulae due to the gluonic contribution to the flavour singlet axial anomaly are given. The decay constants satisfy a modified Dashen formula which generalises the Witten--Veneziano for...
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| Lenguaje: | eng |
| Publicado: |
1999
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| Acceso en línea: | https://dx.doi.org/10.1016/S0920-5632(00)00588-0 http://cds.cern.ch/record/395830 |
| _version_ | 1780893881734266880 |
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| author | Shore, G.M. |
| author_facet | Shore, G.M. |
| author_sort | Shore, G.M. |
| collection | CERN |
| description | The radiative decays $\eta'(\eta)\rta\gamma\gamma$ are discussed. The modifications of the conventional PCAC formulae due to the gluonic contribution to the flavour singlet axial anomaly are given. The decay constants satisfy a modified Dashen formula which generalises the Witten--Veneziano formula for the mass of the $\eta'$. It is shown how the topological susceptibility in QCD with massive, dynamical quarks may be extracted from measurements of |
| id | cern-395830 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1999 |
| record_format | invenio |
| spelling | cern-3958302019-09-30T06:29:59Zdoi:10.1016/S0920-5632(00)00588-0http://cds.cern.ch/record/395830engShore, G.M.$\eta^{'} \to \gamma \gamma$ and the topological susceptibilityParticle Physics - PhenomenologyThe radiative decays $\eta'(\eta)\rta\gamma\gamma$ are discussed. The modifications of the conventional PCAC formulae due to the gluonic contribution to the flavour singlet axial anomaly are given. The decay constants satisfy a modified Dashen formula which generalises the Witten--Veneziano formula for the mass of the $\eta'$. It is shown how the topological susceptibility in QCD with massive, dynamical quarks may be extracted from measurements ofThe radiative decays $\eta'(\eta)\rta\gamma\gamma$ are discussed. The modifications of the conventional PCAC formulae due to the gluonic contribution to the flavour singlet axial anomaly are given. The decay constants satisfy a modified Dashen formula which generalises the Witten--Veneziano formula for the mass of the $\eta'$. It is shown how the topological susceptibility in QCD with massive, dynamical quarks may be extracted from measurements of $\eta'(\eta)\rta\gamma\gamma$.hep-ph/9908273CERN-TH-99-238SWAT-99-235CERN-TH-99-238SWAT-235oai:cds.cern.ch:3958301999-08-06 |
| spellingShingle | Particle Physics - Phenomenology Shore, G.M. $\eta^{'} \to \gamma \gamma$ and the topological susceptibility |
| title | $\eta^{'} \to \gamma \gamma$ and the topological susceptibility |
| title_full | $\eta^{'} \to \gamma \gamma$ and the topological susceptibility |
| title_fullStr | $\eta^{'} \to \gamma \gamma$ and the topological susceptibility |
| title_full_unstemmed | $\eta^{'} \to \gamma \gamma$ and the topological susceptibility |
| title_short | $\eta^{'} \to \gamma \gamma$ and the topological susceptibility |
| title_sort | $\eta^{'} \to \gamma \gamma$ and the topological susceptibility |
| topic | Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1016/S0920-5632(00)00588-0 http://cds.cern.ch/record/395830 |
| work_keys_str_mv | AT shoregm etatogammagammaandthetopologicalsusceptibility |