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Phys. Rev. D 73, 012003 (2006) [10 pages]

Experimental study of χb(2P)→ππχb(1P)

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C. Cawlfield et al. CLEO Collaboration
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Received 6 November 2005; published 19 January 2006

We have searched for the di-pion transition χb(2P)→ππχb(1P) in the CLEO III sample of Υ(3S) decays in the exclusive decay chain: Υ(3S)→γχb(2P), χb(2P)→ππχb(1P), χb(1P)→γΥ(1S), Υ(1S)→+-. Our studies include both π+π- and π0π0, each analyzed both in fully-reconstructed events and in events with one pion undetected. We show that the null hypothesis is not substantiated. Under reasonable assumptions, we find the partial decay width to be Γ(χb(2P)→ππχb(1P))=(0.83±0.22±0.08±0.19)  keV, with the uncertainties being statistical, internal CLEO systematics, and common systematics from outside sources.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.73.012003
DOI:
10.1103/PhysRevD.73.012003
PACS:
13.25.Gv