Observation Of D-S1(2536)(+) -> D+Pi K--(+) And Angular Decomposition Of D-S1(2536)(+)-> D*K-+(S)0

V. Balagura, I. Adachi,H. Aihara, K. Arinstein, V. Aulchenko,T. Aushev, A. M. Bakich, E. Barberio, A. Bay, K. Belous,V. Bhardwaj,U. Bitenc,A. Bondar, A. Bozek, M. Bracko,J. Brodzicka, T. E. Browder,M. -C. Chang, Y. Chao,A. Chen,W. T. Chen,B. G. Cheon,R. Chistov, I. -S. Cho,Y. Choi,J. Dalseno,M. Danilov,A. Drutskoy,S. Eidelman,D. Epifanov, N. Gabyshev, A. Garmash, B. Golob,H. Ha,J. Haba, T. Hara,N. C. Hastings, K. Hayasaka, H. Hayashii,M. Hazumi,D. Heffernan, Y. Hoshi,W. -S. Hou,H. J. Hyun,K. Inami,A. Ishikawa,H. Ishino, R. Itoh,M. Iwasaki, Y. Iwasaki,D. H. Kah,H. Kaji,N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi,H. J. Kim,H. O. Kim,Y. J. Kim,K. Kinoshita, S. Korpar,P. Krizan,P. Krokovny,C. C. Kuo,A. Kuzmin,Y. -J. Kwon,J. S. Lange,M. J. Lee, S. E. Lee,T. Lesiak, A. Limosani,S. -W. Lin,Y. Liu, D. Liventsev,F. Mandl,S. Mconie, T. Medvedeva,W. Mitaroff,H. Miyake,H. Miyata,Y. Miyazaki, R. Mizuk,D. Mohapatra,G. R. Moloney,Y. Nagasaka, E. Nakano, M. Nakao,H. Nakazawa,Z. Natkaniec,S. Nishida,O. Nitoh,S. Ogawa, T. Ohshima, S. Okuno,S. L. Olsen, W. Ostrowicz,H. Ozaki,P. Pakhlov,G. Pakhlova,H. Palka,C. W. Park, L. S. Peak, R. Pestotnik,L. E. Piilonen, Y. Sakai,O. Schneider, K. Senyo, M. Shapkin,C. P. Shen,H. Shibuya, J. -G. Shiu,A. Somov, S. Stanic, M. Staric,T. Sumiyoshi,K. Tamai, M. Tanaka,G. N. Taylor,Y. Teramoto,I. Tikhomirov, S. Uehara,K. Ueno,T. Uglov, Y. Unno,S. Uno,P. Urquijo,Y. Usov, G. Varner,K. Vervink,S. Villa, A. Vinokurova,C. C. Wang,C. H. Wang, M. -Z. Wang, P. Wang,X. L. Wang, Y. Watanabe,E. Won,B. D. Yabsley,A. Yamaguchi, Y. Yamashita,M. Yamauchi, Z. P. Zhang,V. Zhilich, V. Zhulanov, A. Zupanc, O. Zyukova

PHYSICAL REVIEW D(2008)

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摘要
Using 462 fb(-1) of e(+)e(-) annihilation data recorded by the Belle detector, we report the first observation of the decay D-s1(2536)(+)-> D+pi K--(+). The ratio of branching fractions B(D-s1(2536)(+)-> D+pi K--(+))/B(D-s1(2536)(+)-> D*K-+(0)) is measured to be (3.27 +/- 0.18 +/- 0.37)%. We also study the angular distributions in the D-s1(2536)(+)-> D*K-+(S)0 decay and measure the ratio of D- and S-wave amplitudes. The S-wave dominates, with a partial width of Gamma(S)/Gamma(total)=0.72 +/- 0.05 +/- 0.01.
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