Search for leptonic decays of D^{0} mesons

M. Petrič,M. Starič, I. Adachi,H. Aihara,K. Arinstein,T. Aushev,A. M. Bakich,V. Balagura, E. Barberio,K. Belous,V. Bhardwaj,M. Bračko,T. E. Browder,A. Chen,P. Chen,B. G. Cheon,I.-S. Cho,Y. Choi,J. Dalseno,M. Danilov,A. Das,Z. Doležal,A. Drutskoy,W. Dungel,S. Eidelman,N. Gabyshev, P. Goldenzweig,B. Golob,H. Ha, J. Haba, H. Hayashii,Y. Horii,Y. Hoshi,W.-S. Hou,H. J. Hyun, T. Iijima,K. Inami,R. Itoh, M. Iwabuchi, Y. Iwasaki,N. J. Joshi,T. Julius,N. Katayama, T. Kawasaki,C. Kiesling,H. J. Kim,H. O. Kim,M. J. Kim,S. K. Kim,B. R. Ko,S. Korpar,P. Križan,P. Krokovny, T. Kuhr,A. Kuzmin,Y.-J. Kwon,S.-H. Kyeong,J. S. Lange,S.-H. Lee,J. Li, A. Limosani,C. Liu,D. Liventsev,R. Louvot,A. Matyja,S. McOnie,H. Miyata,Y. Miyazaki,R. Mizuk,G. B. Mohanty, T. Mori, M. Nakao,Z. Natkaniec, S. Nishida,O. Nitoh,T. Ohshima,S. Okuno,S. L. Olsen,G. Pakhlova,C. W. Park,H. Park,H. K. Park,R. Pestotnik,L. E. Piilonen,M. Prim,M. Röhrken,S. Ryu, Y. Sakai, O. Schneider,K. Senyo,M. E. Sevior,M. Shapkin,V. Shebalin,C. P. Shen,J.-G. Shiu,B. Shwartz,F. Simon,P. Smerkol,T. Sumiyoshi, M. Tanaka,N. Taniguchi, G. N. Taylor,Y. Teramoto, K. Trabelsi,T. Tsuboyama, S. Uehara, Y. Unno,S. Uno, G. Varner,K. Vervink,A. Vinokurova,C. H. Wang, M.-Z. Wang, P. Wang,M. Watanabe, Y. Watanabe,E. Won,B. D. Yabsley, Y. Yamashita,C. C. Zhang, Z. P. Zhang, V. Zhulanov,T. Zivko, A. Zupanc

PHYSICAL REVIEW D（2010）

引用 82|浏览99

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摘要

We search for the flavor-changing neutral current decays D-0 -> mu(+)mu(-) and D-0 -> e(+)e(-), and for the lepton-flavor violating decays D-0 -> e(+/-)mu(-/+) using 660 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We find no evidence for any of these decays. We obtain significantly improved upper limits on the branching fractions: B(D-0 -> mu(+)mu(-)) < 1.4 x 10(-7), B(D-0 -> e(+)e(-)) < 7.9 x 10(-8), and B(D-0 -> e(+)mu(-)) + B(D-0 -> mu(+)e(-)) < 2.6 x 10(-7) at 90% confidence level.

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关键词

elementary particles,linear accelerator,detector,data collection,neutral current,identification,confidence level

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