Is Υ ( 3 S ) a pure S − wave ?
نویسندگان
چکیده
Assuming the QCD multipole expansion is applicable to hadronic transitions of Υ(3S) into lower level bottomonia, we consider the possibility that Υ(3S) has a D−wave component. This assumption leads to a natural explanation of the ππ spectrum in Υ(3S) → Υ(1S) ππ. Consequences of this assumption on other hadronic and radiative transitions of Υ(3S) are also discussed in the same context. PACS numbers: 14.40.Gx, 13.25.+m, 13.40.Hq
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