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Measurement of masses and branching ratios of Ξc+ and Ξc0 baryons
Lesiak, T.,Abe, K.,Abe, K.,Adachi, I.,Aihara, H.,Asano, Y.,Bahinipati, S.,Bakich, A.M.,Bay, A.,Bitenc, U.,Bizjak, I.,Bondar, A.,Bozek, A.,Brač,ko, M.,Brodzicka, J.,Browder, T.E.,Chao, Y.,Chen, A. Elsevier 2005 Physics letters: B Vol.605 No.3
<P><B>Abstract</B></P><P>We report a measurement of the Ξc+ and Ξc0 baryon masses, and the branching ratios for various <SUB>Ξc</SUB> decays, using 140 <SUP>fb−1</SUP> of data collected by the Belle experiment at the KEKB <SUP>e+</SUP><SUP>e−</SUP> collider. The mass splitting <SUB>mΞc0</SUB>−<SUB>mΞc+</SUB> is found to be 2.9±0.5 MeV/<SUP>c2</SUP>; this measurement is three times as precise as the current world average. We measure the branching ratios Γ(Ξc+→Λ<SUP>K−</SUP><SUP>π+</SUP><SUP>π+</SUP>)/Γ(Ξc+→<SUP>Ξ−</SUP><SUP>π+</SUP><SUP>π+</SUP>)=0.32±0.03±0.02 and Γ(Ξc0→p<SUP>K−</SUP><SUP>K−</SUP><SUP>π+</SUP>)/Γ(Ξc0→<SUP>Ξ−</SUP><SUP>π+</SUP>)=0.33±0.03±0.03, with improved precision, and measure Γ(Ξc+→pKS0KS0)/Γ(Ξc+→<SUP>Ξ−</SUP><SUP>π+</SUP><SUP>π+</SUP>)=0.087±0.016±0.014, Γ(Ξc0→Λ<SUP>K−</SUP><SUP>π+</SUP>)/Γ(Ξc0→<SUP>Ξ−</SUP><SUP>π+</SUP>)=1.07±0.12±0.07 and Γ(Ξc0→ΛKS0)/Γ(Ξc0→<SUP>Ξ−</SUP><SUP>π+</SUP>)=0.21±0.02±0.02 for the first time.</P>