Search for the semileptonic decays _c⁰ ⁰l⁺l^- at Belle

J. X. Cui,Y. B. Li,C. P. Shen,I Adachi, H. Aihara,S. Al Said,D. M. Asner, T. Aushev, R. Ayad, V. Babu,S. Bahinipati,Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka,D. Biswas, A. Bobrov, D. Bodrov, J. Borah, M. Bracko, P. Branchini,T. E. Browder, A. Budano, M. Campajola, D. Cervenkov,M. -C. Chang, B. G. Cheon, K. Chilikin, K. Cho,S. -K. Choi,Y. Choi, S. Choudhury,S. Das, N. Dash,G. De Nardo,G. De Pietro, R. Dhamija,F. Di Capua,J. Dingfelder, Z. Dolezal, T. V. Dong, S. Dubey, P. Ecker,D. Epifanov, T. Ferber, D. Ferlewicz,B. G. Fulsom, R. Garg, V. Gaur, A. Garmash, A. Giri, P. Goldenzweig, E. Graziani, K. Gudkova, C. Hadjivasiliou, S. Halder, K. Hayasaka, H. Hayashii, S. Hazra, D. Herrmann,W. -S. Hou,C. -L. Hsu, K. Inami,N. Ipsita,A. Ishikawa, R. Itoh, M. Iwasaki,W. W. Jacobs, S. Jia, Y. Jin, D. Kalita, C. Kiesling,D. Y. Kim, K. -H. Kim,Y. -K. Kim,K. Kinoshita, P. Kodys,A. Korobov, S. Korpar, E. Kovalenko, P. Krizan, P. Krokovny, T. Kuhr, D. Kumar,R. Kumar,Y. -J. Kwon, T. Lam,S. C. Lee,L. K. Li,Y. Li,L. Li Gioi, J. Libby, D. Liventsev, Y. Ma, M. Masuda, D. Matvienko, S. K. Maurya, F. Meier,M. Merola, K. Miyabayashi, R. Mizuk, R. Mussa, M. Nakao, Z. Natkaniec,A. Natochii, L. Nayak, S. Nishida, S. Ogawa, H. Ono, P. Oskin, P. Pakhlov, G. Pakhlova, S. Pardi,H. Park, J. Park,S. -H. Park, S. Patra,S. Paul,T. K. Pedlar, R. Pestotnik,L. E. Piilonen, T. Podobnik, M. T. Prim, N. Rout, G. Russo, S. Sandilya,L. Santelj, V. Savinov, G. Schnell, C. Schwanda, Y. Seino, K. Senyo,M. E. Sevior, W. Shan, C. Sharma,J. -G. Shiu, A. Sokolov, E. Solovieva, M. Staric, Z. S. Stottler, M. Sumihama, M. Takizawa, K. Tanida, F. Tenchini, R. Tiwary, T. Uglov, Y. Unno,S. Uno, Y. Usov, A. Vinokurova,M. -Z. Wang, S. Watanuki, E. Won,B. D. Yabsley, W. Yan, J. Yelton,J. H. Yin, L. Yuan,Z. P. Zhang, V. Zhilich, V. Zhukova

PHYSICAL REVIEW D（2024）

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摘要

Using the full data sample of 980fb(-1) collected with the Belle detector at the KEKB asymmetric energy electron-positron collider, we report the results of the first search for the rare semileptonic decays Xi(0)(c)->Xi 0l & thorn;l-(l 1/4 eor mu). No significant signals are observed in the Xi 0l & thorn;l-invariant-mass distributions. Taking the de fraction ratios B( Xi(0)(c)->Xi(e0)& thorn;e-& THORN;=B & eth;Xi 0c ->Xi-pi & thorn;& THORN;<6.7x10-3andB & eth;Xi 0c ->Xi 0 mu & thorn;mu-& THORN;=B & eth;Xi 0c ->Xi-pi & thorn;& THORN;<4.3x10-3based on the phase-space assumption for signal decays. The 90% credibility upperlimits on the absolute branching fractions of B & eth;Xi 0c ->Xi 0e & thorn;e-) and B & eth;Xi(0)c ->Xi(0)mu(+)mu(-)) are found to be9.9x10(-5 )and 6.5x10(-5), respectively.

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Search for the semileptonic decays c0 0l+l- at Belle

Search for the semileptonic decays _c⁰ ⁰l⁺l^- at Belle