Using the entire data sample of 980 fb−1 integrated luminosity collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, we present an amplitude analysis measuring the branching fractions of the Cabibbo-allowed, W-exchange resonant decay Ξ0c→Ξ0ϕ(→K+K−) with a polarized ϕ and the non-resonant decay via a direct process Ξ0c→Ξ0K+K−. We present these measurements, relative to the normalization mode Ξ−π+, and find branching ratios B(Ξ0c→Ξ0ϕ(→K+K−))/B(Ξ0c→Ξ−π+)=0.036±0.004(stat.)±0.002(syst.) and B(Ξ0c→Ξ0K+K−)/B(Ξ0c→Ξ−π+)=0.039±0.004(stat.)±0.002(syst.) which suggest that only minor cusping peaks occur in the combinatorial background of Ω∗−→Ξ0K− due to these Ξ0c decays.
Measurement of the resonant and nonresonant branching ratios in Ξc0→Ξ0K+K−
Tenchini, F.;
2021-01-01
Abstract
Using the entire data sample of 980 fb−1 integrated luminosity collected with the Belle detector at the KEKB asymmetric-energy e+e− collider, we present an amplitude analysis measuring the branching fractions of the Cabibbo-allowed, W-exchange resonant decay Ξ0c→Ξ0ϕ(→K+K−) with a polarized ϕ and the non-resonant decay via a direct process Ξ0c→Ξ0K+K−. We present these measurements, relative to the normalization mode Ξ−π+, and find branching ratios B(Ξ0c→Ξ0ϕ(→K+K−))/B(Ξ0c→Ξ−π+)=0.036±0.004(stat.)±0.002(syst.) and B(Ξ0c→Ξ0K+K−)/B(Ξ0c→Ξ−π+)=0.039±0.004(stat.)±0.002(syst.) which suggest that only minor cusping peaks occur in the combinatorial background of Ω∗−→Ξ0K− due to these Ξ0c decays.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
