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Título : Obtaining sigma -> gamma gamma Width from Nucleon Polarizabilities
Autor : Bernabéu, José, Prades, Joaquim
Fecha de publicación : Jan-2009
Editor: Elsevier
Citación : Nuclear Physics - Section B-PS - Proceedings Supplements 186: 279-282 (2009)
Resumen: We propose a new method that fixes the coupling to two photons of the recently found lightest QCD resonance, the sigma. This coupling provides crucial information for discriminating the yet unknown nature of this special state. Our method uses available data on the nucleon polarizabilities together with analyticity and unitarity. Taking into account all the uncertainties, our result is Gamma_{pole}= 1.2 +- 0.4 keV.
Versión del editor: 10.1016/j.nuclphysbps.2008.12.062
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2008.12.062
Appears in Collections:(IFIC) Comunicaciones congresos

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