Decay of light scalar mesons into vector-photon and into pseudoscalar mesons

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• 作者：Francesco Giacosa ; Giuseppe Pagliara
• 关键词：Light scalar mesons ; Radiative decays ; Tetraquark states
• 刊名：Nuclear Physics A
• 出版年：2010
• 出版时间：1 February 2010
• 年：2010
• 卷：833
• 期：1-4
• 页码：138-155
• 全文大小：315 K

文摘

The decays of a light scalar meson into a vector meson and a photon (S→Vγ) are evaluated in the tetraquark and quarkonium assignments of the scalar states. A link with the radiative decays →Sγ is established: experimental results for S→Vγ will make it possible to decide if the direct, quark-loop contribution to →Sγ or the kaon-loop contribution is dominant. Also strong decays S→PP – where P denotes a pseudoscalar meson – are investigated: within our scheme, the tetraquark assignment works better than the quarkonium one.