Anomalies in ψ ( 2 S ) decay and the ρπ puzzle
نویسنده
چکیده
We examine the so-called ρπ puzzle of the ψ(2S) decay by incorporating two inputs: One is the relative phase between the one-photon and the gluonic decay amplitude, and the other is a possible anomaly in the inclusive nonelectromagnetic decay rate of ψ(2S). We propose the possibility that in the ψ(2S) decay a hadronic decay process of long-distance origin is important in addition to the short-distance decay process. The amplitude of this additional process should nearly cancel the three-gluon amplitude in the exclusive decay ψ(2S) → 10 and turn the sum dominantly real in contrast to the J/ψ decay. We present general consequences of this mechanism and then briefly look into two models which might possibly explain the source of this additional amplitude. PACS numbers: 13.25.Gv, 14.40.Gx, 11.30.Hv, 12.39.Mk, 13.40.Hq Typeset using REVTEX
منابع مشابه
A possible hadronic excess in ψ ( 2 S ) decay and the ρπ puzzle
We study the so-called ρπ puzzle of the ψ(2S) decay by incorporating two inputs; the relative phase between the one-photon and the gluonic decay amplitude, and a possible hadronic excess in the inclusive nonelectromagnetic decay rate of ψ(2S). We look into the possibility that the hadronic excess in ψ(2S) originates from a decay process of long-distance origin which is absent from the J/ψ decay...
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