Phys. Rev. D 43, 1448–1458 (1991)Study of π+π- transitions from the ϒ(3S) and a search for the hbReceived 24 September 1990; published in the issue dated 1 March 1991 We have investigated the transitions ϒ(3S)→π+π-ϒ(1S), ϒ(3S)→π+π-ϒ(2S) and the cascade process ϒ(3S)→ϒ(2S)+X, ϒ(2S)→π+π-ϒ(1S), both in the exclusive decay mode, with the daughter ϒ state decaying into two leptons, and in the inclusive decay mode, with the daughter ϒ state decaying hadronically. Results are presented on the branching fractions and properties of the π+π- system. The π+π- invariant-mass spectra for the decays ϒ(3S)→π+π-ϒ(1S) and ϒ(3S)→π+π-ϒ(2S) are measured and compared with theoretical predictions. We also present the results of a search for the hb(11P1) and ϒ(13D) states in inclusive ϒ(3S) decays, and for the exclusive decay ϒ(3S)→ηϒ(1S). © 1991 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.43.1448
DOI:
10.1103/PhysRevD.43.1448
PACS:
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