Fast computation of observed cross section for ψ′ → PP decays

It has been conjectured that the relative phase between strong and electromagnetic amplitudes is universally -90° in charmonium decays. ψ′ decaying into a pseudoscalar pair provides a possibility to test this conjecture. However, the experimentally observed cross section for such a process is depict...

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Veröffentlicht in:Chinese physics C 2011-05, Vol.35 (5), p.411-418
Hauptverfasser: Wang, Bo-Qun (博群 王), Mo, Xiao-Hu (晓虎 莫), Wang, Ping (平王), Ban, Yong (勇班)
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Sprache:eng
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