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arXiv · 1611.09455

Search for $D^{0}$ decays to invisible final states at Belle

Y. -T. Lai·M. -Z. Wang·I. Adachi·H. Aihara·S. Al Said·D. M. Asner·T. Aushev·R. Ayad·I. Badhrees·A. M. Bakich·V. Bansal·E. Barberio·M. Berger·V. Bhardwaj·B. Bhuyan·J. Biswal·A. Bobrov·A. Bozek·M. Bračko·D. Črvenkov·P. Chang·A. Chen·B. G. Cheon·K. Chilikin·R. Chistov·K. Cho·V. Chobanova·Y. Choi·D. Cinabro·N. Dash·S. Di Carlo·Z. Doležal·D. Dutta·S. Eidelman·D. Epifanov·H. Farhat·J. E. Fast·T. Ferber·B. G. Fulsom·V. Gaur·N. Gabyshev·A. Garmash·R. Gillard·P. Goldenzweig·B. Golob·K. Hayasaka·W. -S. Hou·C. -L. Hsu·T. Iijima·K. Inami·G. Inguglia·A. Ishikawa·R. Itoh·Y. Iwasaki·W. W. Jacobs·I. Jaegle·H. B. Jeon·D. Joffe·K. K. Joo·T. Julius·K. H. Kang·T. Kawasaki·D. Y. Kim·J. B. Kim·K. T. Kim·M. J. Kim·S. H. Kim·Y. J. Kim·K. Kinoshita·P. Kodyš·D. Kotchetkov·P. Krokovny·T. Kuhr·R. Kulasiri·Y. -J. Kwon·J. S. Lange·I. S. Lee·C. H. Li·L. Li·Y. Li·L. Li Gioi·J. Libby·D. Liventsev·M. Masuda·T. Matsuda·D. Matvienko·K. Miyabayashi·H. Miyata·R. Mizuk·G. B. Mohanty·S. Mohanty·E. Nakano·M. Nakao·H. Nakazawa·T. Nanut·K. J. Nath·Z. Natkaniec·M. Nayak·S. Nishida·S. Ogawa
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Abstract

We report the result from the first search for $D^0$ decays to invisible final states. The analysis is performed on a data sample of 924 $\rm{fb}^{-1}$ collected at and near the $\Upsilon(4S)$ and $\Upsilon(5S)$ resonances with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The absolute branching fraction is determined using an inclusive $D^0$ sample, obtained by fully reconstructing the rest of the particle system including the other charmed particle. No significant signal yield is observed and an upper limit of $9.4\times 10^{-5}$ is set on the branching fraction of $D^0$ to invisible final states at 90\% confidence level.

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Y. -T. Lai, M. -Z. Wang, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, V. Bansal, E. Barberio, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, D. Črvenkov, P. Chang, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Doležal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, B. Golob, K. Hayasaka, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, D. Joffe, K. K. Joo, T. Julius, K. H. Kang, T. Kawasaki, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, D. Kotchetkov, P. Krokovny, T. Kuhr, R. Kulasiri, Y. -J. Kwon, J. S. Lange, I. S. Lee, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, E. Nakano, M. Nakao, H. Nakazawa, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, S. Nishida, S. Ogawa. 2016-11-29. Search for $D^{0}$ decays to invisible final states at Belle. https://doi.org/10.1103/physrevd.95.011102

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