ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract In the experiment withe + e −-beams performed at the VEPP-4 storage ring with the MD-1 detector we have measuredB μμ, the branching ratio for the decay of Υ(1S) state intoμ + μ −. We obtainedB μμ=(2.12+0.20+0.10)%. It is shown that the continuum and resonance interference should be taken into account. For the first time the upper limits on the branching ratio for the decaysΥ→π + π −,K + K −,p $$\bar p$$ have been measured: Br(Υ→π + π −)〈5·10−4, Br(Υ→K + K −)〈5·10−4, Br(Υ→p $$\bar p$$ 〈9·10−4 (90% CL).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01566650
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