Measurement of the branching ratio for Υ(1S) state intoπ + π − andsearch for decaysΥ(1S)→π + π −,K + K −,p $$\bar p$$

In the experiment withe+e−-beams performed at the VEPP-4 storage ring with the MD-1 detector we have measuredBμμ, the branching ratio for the decay of Υ(1S) state intoμ+μ−. We obtainedBμμ=(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−)