Observation of B-→$\bar{p}$ΛD0 at Belle

• Published in: Physical review. D, Particles, fields, gravitation, and cosmology Vol. 84; no. 7
• Main Authors: Chen, P., Wang, M. Z., Adachi, I., Aihara, H., Asner, David M., Barberio, E., Bozek, A., Browder, Thomas E., Chang, M-C, Chang, P., Chao, Y., Chen, A., Cheon, B. G., Cho, I- S., Cho, K., Choi, Y., Danilov, M., Drasal, Z., Fast, James E., Gaur, Vipin, Goh, Y. M., Haba, J., Hara, Takanori, Hayashii, H., Hoshi, Y., Hou, W. S., Hsiung, Y. B., Hyun, H. J., Ishikawa, A., Iwabuchi, Masaya, Iwasaki, Y., Julius, T., Kapusta, P., Katayama, N., Kawasaki, T., Kichimi, H., Kiesling, C., Kim, H. O., Kim, J. B., Kim, J. H., Kim, K. T., Kim, M. J., Kim, Y. J., Kinoshita, Kay, Ko, Byeong Rok, Kobayashi, N., Koblitz, S., Krizan, P., Kuhr, T., Kuzmin, A., Kwon, Y. J., Lange, J. S., Lee, S. H., Li, J., Libby, J., Liu, C., Liu, Y., Liventsev, Dmitri, Louvot, R., McOnie, S., Miyata, H., Miyazaki, Y., Nagasaka, Y., Nakano, E., Natkaniec, Z., Neubauer, S., Nishida, S., Ogawa, S., Ohshima, T., Olsen, Stephen L., Onuki, Y., Park, H., Park, H. K., Pedlar, Todd K., Piilonen, Leo E., Ritter, M., Rohrken, M., Sanuki, T., Schneider, O., Schwanda, C., Senyo, K., Sevior, Martin E., Shen, C. P., Shibata, TA, Shiu, Jing-Ge, Smerkol, P., Stanic, S., Staric, M., Sumihama, M., Sumiyoshi, T., Teramoto, Y., Uehara, S., Unno, Yuji, Varner, Gary, Varvell, K. E., Wang, X. L., Watanabe, Y., Won, Eun Il, Yamashita, Y., Zhang, Z. P.
• Format: Journal Article
• Language: English
• Published: United States American Physical Society (APS) 10-10-2011
• Subjects: PARTICLE ACCELERATORS
• ISSN: 1550-7998; 1550-2368
• DOI: 10.1103/PhysRevD.84.071501

We study B- meson decays to $\bar{p}$ΛD(*)0final states using a sample of 657×106B$\bar{B}$ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The observed branching fraction for B-→$\bar{p}$ΛD0 is (1.43$+0.28\atop{-0.25}$±0.18)×10-5 with a significance of 8.1 standard deviations, where the uncertainties are statistical and systematic, respectively. Most of the signal events have the $\bar{p}$ Λ mass peaking near threshold. No significant signal is observed for $\bar{p}$ΛD(*)0 and the corresponding upper limit on the branching fraction is 4.8×10-5 at the 90% confidence level.