Experimental studies of the π⁺π^-π⁺π^-π⁰, K⁺K^-π⁺π^-π⁰ and pp̄π⁺π^-π⁰ final states produced in e⁺e^- annihilation at $\sqrt{s}= 3.773$ and 3.650 GeV

Abstract

We report measurements of the observed cross sections for e⁺e^-→ωπ⁺π^-, ωK⁺K^-, ωpp̄, K⁺K^-ρ⁰π⁰, K⁺K^-ρ⁺π^-+c.c., K^*0K^-π⁺π⁰+c.c., K^*+K^-π⁺π^-+c.c., φπ⁺π^-π⁰ and ΛΛ̄π⁰ at $\sqrt{s}= 3.773$ and 3.650 GeV. Upper limits (90% C.L.) are given for observed cross sections and for ψ(3770) decay branching fractions for production of these final states. These measurements are made by analyzing the data sets of 17.3 pb^-1 collected at $\sqrt{s}=$3.773 GeV and 6.5 pb^-1 collected at $\sqrt{s}=$3.650 GeV with the BES-II detector at the BEPC collider.