1. Search for $B^0$ Decays to Invisible Final States ($+\gamma$) at Belle
- Author
-
Belle Collaboration, Ku, Y., Chang, P., Adachi, I., Adamczyk, K., Aihara, H., Asner, D. M., Aushev, T., Ayad, R., Behera, P., {n}o, C. Bele\, Bennett, J., Bhardwaj, V., Bilka, T., Biswal, J., Bonvicini, G., Bozek, A., Bračko, M., Chang, M. -C., Chekelian, V., Chilikin, K., Cho, K., Choi, S. -K., Choi, Y., Cinabro, D., Cunliffe, S., Dash, N., De Nardo, G., Dong, T. V., Eidelman, S., Epifanov, D., Fast, J. E., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Goldenzweig, P., Grzymkowska, O., Guan, Y., Hartbrich, O., Hayasaka, K., Hayashii, H., Villanueva, M. Hernandez, Higuchi, T., Hou, W. -S., Hsu, C. -L., Huang, K., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jia, S., Jin, Y., Kang, K. H., Kawasaki, T., Kichimi, H., Kiesling, C., Kim, C. H., Kim, D. Y., Kimmel, T. D., Kinoshita, K., Kodyš, P., Korpar, S., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kulasiri, R., Kumar, R., Kwon, Y. -J., Lai, Y. -T., Li, Y. B., Gioi, L. Li, Libby, J., Lieret, K., MacQueen, C., Matvienko, D., Merola, M., Mizuk, R., Mohanty, G. B., Moon, T. J., Mori, T., Mussa, R., Natkaniec, Z., Nayak, M., Nisar, N. K., Nishida, S., Nishimura, K., Ogawa, K., Ogawa, S., Ono, H., Oskin, P., Pakhlov, P., Pakhlova, G., Park, H., Park, S. -H., Patra, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Podobnik, T., Popov, V., Prim, M. T., Ritter, M., Röhrken, M., Rostomyan, A., Rout, N., Russo, G., Sakai, Y., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Schwartz, A. J., Senyo, K., Shapkin, M., Shiu, J. -G., Shwartz, B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Usov, Y., Varner, G., Varvell, K. E., Vinokurova, A., Wang, C. H., Wang, E., Wang, M. -Z., Wang, P., Wang, X. L., Watanabe, M., Won, E., Xu, X., Yang, S. B., Ye, H., Yuan, C. Z., Zhang, Z. P., and Zhukova, V.
- Subjects
High Energy Physics - Experiment - Abstract
We report searches for $B^0\to\rm{invisible}$ and $B^0\to\rm{invisible}+\gamma$ decays, where the energy of the photon is required to be larger than 0.5 GeV. These results are obtained from a $711\,{\rm fb}^{-1}$ data sample that contains $772 \times 10^6 B\bar{B}$ pairs and was collected near the $\Upsilon\,(4S)$ resonance with the Belle detector at the KEKB $e^+ e^-$ collider. We observe no significant signal for either decay and set upper limits on their branching fractions at $90\%$ confidence level of $\mathcal{B}\,(B^0\to\rm{invisible}) < 7.8\times10^{-5}$ and $\mathcal{B}\,(B^0\to\rm{invisible}+\gamma) < 1.6\times10^{-5}$., Comment: submitted to Physical Review D
- Published
- 2020
- Full Text
- View/download PDF