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ZhETF, Vol. 128, No. 6, p. 1201 (December 2005)
(English translation - JETP, Vol. 101, No. 6, p. 1053, December 2005 available online at www.springer.com )

STUDY OF THE PROCESS e+e- \to \pi+\pi- IN THE ENERGY REGION 400<\sqrt{s}<1000 MeV

PACS: 13.66.Bc, 13.66.Jn, 13.25.Jx, 12.40.Vv

 DJVU (282.1K) PDF (855.4K)

The cross section of the process was measured in the spherical neutral detector experiment at the VEPP-2M collider in the energy region MeV. This measurement was based on about 12.4 • 106 selected collinear events, which include 7.4• 106 , 4.5• 106 , and 0.5• 106 selected events. The systematic uncertainty of the cross section determination is 1.3 %. The ρ-meson parameters were determined as MeV, MeV, and nb and the parameters of the G-parity suppressed decay as nb and degree.

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