在Belle搜索$ x（3872）\toπ^+π^-π^0 $

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在Belle搜索$ x（3872）\toπ^+π^-π^0 $

Search for $X(3872)\toπ^+π^-π^0$ at Belle

论文作者

Belle Collaboration, Yin, J. H., Won, E., Adachi, I., Aihara, H., Said, S. Al, Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Babu, V., Bahinipati, S., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., Bračko, M., Branchini, P., Browder, T. E., Budano, A., Campajola, M., Červenkov, D., Chang, M. -C., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, H. E., Cho, K., Cho, S. -J., Choi, S. -K., Choi, Y., Choudhury, S., Cinabro, D., Das, S., De Pietro, G., Dhamija, R., Di Capua, F., Dingfelder, J., Doležal, Z., Dong, T. V., Ferber, T., Ferlewicz, D., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Graziani, E., Gudkova, K., Hadjivasiliou, C., Hayasaka, K., Hayashii, H., Hou, W. -S., Hsu, C. -L., Inami, K., Ipsita, N., Ishikawa, A., Itoh, R., Iwasaki, M., Jacobs, W. W., Jang, E. -J., Jia, S., Jin, Y., Joo, K. K., Kakuno, H., Kang, K. H., Karyan, G., Kawasaki, T., Kiesling, C., Kim, C. H., Kim, D. Y., Kim, K. -H., Kim, Y. -K., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Korpar, S., Kovalenko, E., Križan, P., Krokovny, P., Kumar, M., Kumar, R., Kumara, K., Lam, T., Lange, J. S., Lee, S. C., Li, C. H., Li, J., Li, L. K., Li, Y., Li, Y. B., Gioi, L. Li, Libby, J., Lieret, K., Masuda, M., Matsuda, T., Matvienko, D., Maurya, S. K., Meier, F., Merola, M., Miyabayashi, K., Mizuk, R., Mohanty, G. B., Moon, H. K., Mrvar, M., Mussa, R., Nakao, M., Natkaniec, Z., Natochii, A., Nayak, L., Nayak, M., Niiyama, M., Nisar, N. K., Nishida, S., Ogawa, S., Ono, H., Onuki, Y., Oskin, P., Pakhlov, P., Pakhlova, G., Pardi, S., Park, H., Park, S. -H., Patra, S., Paul, S., Pestotnik, R., Piilonen, L. E., Podobnik, T., Prencipe, E., Prim, M. T., Rout, N., Russo, G., Sakai, Y., Sandilya, S., Sangal, A., Santelj, L., Sanuki, T., Savinov, V., Schnell, G., Schueler, J., Schwanda, C., Seino, Y., Senyo, K., Sevior, M. E., Shapkin, M., Sharma, C., Shen, C. P., Shiu, J. -G., Singh, J. B., Sokolov, A., Solovieva, E., Starič, M., Stottler, Z. S., Strube, J. F., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Uchida, M., Uglov, T., Unno, Y., Uno, K., Uno, S., van Tonder, R., Varner, G., Vinokurova, A., Waheed, E., Wang, E., Wang, M. -Z., Watanabe, M., Watanuki, S., Yabsley, B. D., Yan, W., Yang, S. B., Yuan, C. Z., Yusa, Y., Zhai, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V.

论文摘要

我们提出搜索$ x（3872）\ to $（772 \ pm11）\ toπ^+π^-π^0 $ k^{\ pm} x（3872）$和$ b^{0} \ to k_ {s}^0 x（3872）$衰减。我们不观察信号，并为两个不同模型的衰减过程设置90 \％可信的上限：如果衰减产物在相空间中均匀分布，则$ \ nathcal {b}（x（3872）\至π^+π^+π^-π^-π^0）<1.3 \％$;如果$ m（π^+π^ - ）$集中在$ d^0 \ bar d^0 $对的质量附近$ x（3872）\ to d^0 \ bar {d}^{*0}+c.c。 $ \ MATHCAL {B}（x（3872）\toπ^+π^-π^0）<1.2 \ times10^{ - 3} $。

We present a search for the decay $X(3872) \to π^+π^-π^0$ in the $(772\pm11)\times10^6$ $Υ(4S)\to B \bar B$ data sample collected at the Belle detector, where the $X(3872)$ is produced in $B^{\pm}\to K^{\pm}X(3872)$ and $B^{0}\to K_{S}^0 X(3872)$ decays. We do not observe a signal, and set 90\% credible upper limits for two different models of the decay processes: if the decay products are distributed uniformly in phase space, $\mathcal{B}(X(3872) \to π^+π^-π^0) < 1.3\%$; if $M(π^+π^-)$ is concentrated near the mass of the $D^0 \bar D^0$ pair in the process $X(3872)\to D^0\bar{D}^{*0}+c.c.\to D^0 \bar D^{0}π^0\toπ^+ π^- π^0$, $\mathcal{B}(X(3872) \to π^+π^-π^0) < 1.2\times10^{-3}$.

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