Measurement of the absolute branching fraction of the Ds+- meson

I Adachi, J Dragic,Hirofumi Fujii, T Gershon,J Haba,Masashi Hazumi,Toshiro Higuchi,Youichi Igarashi,R Itoh, Yasumasa Iwasaki, Naoya Katayama,H Kichimi,P Krokovny, A Limosani,I Nakamura,Mikihiko Nakao,Hiroshi Nakazawa,S Nishida,Tadao Nozaki,H Ozaki,F J Ronga,Saburou Saitoh,Yoshio Sakai, R Stamen,K Sumisawa,Sachiko Suzuki,O Tajima,F Takasaki,K Tamai,M Tanaka,Karim Trabelsi,T Tsuboyama,T Tsukamoto,S Uehara, Y Unno,S Uno,Y Ushiroda,Makoto Yamauchi,J W Zhang,Y Hoshi,K Neichi,H Aihara,N C Hastings,Akira Ishikawa,Kouichi Itoh,Masayuki Iwasaki,H Kakuno, Akiko Kusaka, Y Nakahama,Kenji Tanabe

mag（2007）

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摘要

The Ds+- -> K+-K-+pi+- absolute branching fraction is measured using e+e- -> Ds*+- Ds1-+(2536) events collected by the Belle detector at the KEKB e+e- asymmetric energy collider. Using the ratio of yields when either the Ds1 or Ds* is fully reconstructed, we find Br(Ds+- -> K+-K-+pi+-)= (4.0+-0.4(stat)+-0.4(sys))%.

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high energy physics

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