Detailed Information
Cited 0 time in 
Cited 0 time in 
Cited 0 time in
Metadata Downloads
Observation of B-0 -> Lambda(Lambda)over-barK(0) and B-0 -> Lambda(Lambda)over-barK*(0) at Belle
- Authors
- Chang, Y. -W.; Wang, M. -Z.; Adachi, I.; Aihara, H.; Aushev, T.; Bakich, A. M.; Balagura, V.; Bay, A.; Bhardwaj, V.; Bitenc, U.; Bondar, A.; Bozek, A.; Bracko, M.; Browder, T. E.; Chao, Y.; Chen, A.; Chistov, R.; Choi, Y.; Dalseno, J.; Danilov, M.; Dash, M.; Drutskoy, A.; Eidelman, S.; Goldenzweig, P.; Ha, H.; Han, B. -Y.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Heffernan, D.; Horii, Y.; Hoshi, Y.; Hou, W. -S.; Hyun, H. J.; Inami, K.; Ishikawa, A.; Iwasaki, M.; Iwasaki, Y.; Joshi, N. J.; Kah, D. H.; Kang, J. H.; Kawai, H.; Kawasaki, T.; Kichimi, H.; Kim, H. J.; Kim, Y. I.; Kim, Y. J.; Ko, B. R.; Korpar, S.; Krizan, P.; Kwon, Y. -J.; Kyeong, S. -H.; Lee, J. S.; Lee, M. J.; Lee, S. E.; Lesiak, T.; Limosani, A.; Lin, S. -W.; Liu, C.; Liu, Y.; Louvot, R.; Mandl, F.; Matyja, A.; McOnie, S.; Miyabayashi, K.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Nagasaka, Y.; Nakao, M.; Natkaniec, Z.; Nishida, S.; Nitoh, O.; Ogawa, S.; Okuno, S.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Park, H. K.; Park, K. S.; Peak, L. S.; Pestotnik, R.; Piilonen, L. E.; Rozanska, M.; Sahoo, H.; Sakai, Y.; Schneider, O.; Sekiya, A.; Senyo, K.; Shapkin, M.; Shiu, J. -G.; Shwartz, B.; Singh, J. B.; Stanic, S.; Staric, M.; Sumisawa, K.; Tanaka, M.; Taylor, G. N.; Teramoto, Y.; Tikhomirov, I.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Usov, Y.; Varner, G.; Vervink, K.; Wang, C. H.; Wang, P.; Wang, X. L.; Watanabe, Y.; Wedd, R.; Wei, J. -T.; Won, E.; Yabsley, B. D.; Yamashita, Y.; Zhang, Z. P.; Zhilich, V.; Zivko, T.; Zupanc, A.; Zyukova, O.
- Issue Date
- 3월-2009
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW D, v.79, no.5
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW D
- Volume
- 79
- Number
- 5
- ISSN
- 1550-7998
- Abstract
- We study the charmless decays B -> Lambda(Lambda) over barh , where h stands for pi(+), K+, K-0, K*(+), or K*(0), using a 605 fb(-1) data sample collected at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. We observe B-0 -> Lambda(Lambda) over barK(0) and B-0 -> Lambda(Lambda) over barK*(0) with branching fractions of (4.76(-0.68)(+0.84) (stat) +/- 0. 61 (syst)) x 10(-6) and (2.46(-0.72)(+0.87) +/- 0.34) x 10(-6), respectively. The significances of these signals in the threshold-mass enhanced mass region, M Lambda(Lambda) over bar < 2.85 GeV / c(2), are 12.4 sigma and 9.3 sigma, respectively. We also update the branching fraction B(B+ -> Lambda<(Lambda)over bar>K+) = (3.38(-0.36)(+0.41) +/- 0.41) x 10(-6) with better accuracy, and report the following measurement or 90% confidence level upper limit in the threshold-mass-enhanced region: B(B+ -> Lambda(Lambda) over barK*(+)) = (2.19(-0.88)(+1.13) +/- 0.33) x 10(-6) with 3.7 sigma significance; B(B+ -> Lambda(Lambda) over bar pi(+)) < 0.94) x 10(-6). A related search for B-0 -> Lambda<(Lambda)over bar>(D) over bar0 yields a branching fraction B(B-0 -> Lambda(Lambda) over bar(D) over bar (0)) = (1.05(-0.44)(+0.57) +/- 0.14) x 10(-5). This may be compared with the large, similar to 10(-4), branching fraction observed for B-0 -> p (p) over bar(D) over bar (0). . The M Lambda(Lambda) over bar enhancements near threshold and related angular distributions for the observed modes are also reported.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Science > Department of Physics > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.