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Observation of B-0 -> p(p)over-barK*(0) with a large K*(0) polarization
- Authors
- Chen, J. -H.; Wang, M. -Z.; Adachi, I.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Bakich, A. M.; Balagura, V.; Barberio, E.; Bay, A.; Bedny, I.; Belous, K.; Bitenc, U.; Bondar, A.; Bozek, A.; Bracko, M.; Browder, T. E.; Chang, M. -C.; Chao, Y.; Chen, A.; Chen, K. -F.; Chen, W. T.; Cheon, Byung Gu; Chistov, R.; Cho, I. -S.; Choi, S. -K.; Choi, Y.; Dalseno, J.; Dash, M.; Drutskoy, A.; Eidelman, S.; Golob, B.; Ha, H.; Haba, J.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Heffernan, D.; Hoshi, Y.; Hou, W. -S.; Hsiung, Y. B.; Hyun, H. J.; Inami, K.; Ishikawa, A.; Ishino, H.; Itoh, R.; Iwasaki, M.; Joshi, N. J.; Kah, D. H.; Kaji, H.; Kapusta, P.; Katayama, N.; Kawasaki, T.; Kichimi, H.; Kim, H. J.; Kim, S. K.; Kim, Y. J.; Kinoshita, K.; Krokovny, P.; Kumar, R.; Kuo, C. C.; Kwon, Y. -J.; Lee, J. S.; Lee, M. J.; Lee, S. E.; Lesiak, T.; Li, J.; Limosani, A.; Liu, C.; Liventsev, D.; Mandl, F.; Matyja, A.; McOnie, S.; Medvedeva, T.; Mitaroff, W.; Miyake, H.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Nakano, E.; Nakao, M.; Nakazawa, H.; Natkaniec, Z.; Nishida, S.; Nitoh, O.; Ogawa, S.; Ohshima, T.; Okuno, S.; Olsen, S. L.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Palka, H.; Park, C. W.; Park, H.; Peak, L. S.; Pestotnik, R.; Piilonen, L. E.; Rozanska, M.; Sahoo, H.; Sakai, Y.; Schneider, O.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Shen, C. P.; Shibuya, H.; Shiu, J. -G.; Singh, J. B.; Somov, A.; Stanic, S.; Staric, M.; Sumiyoshi, T.; Takasaki, F.; Tanaka, M.; Taylor, G. N.; Teramoto, Y.; Tikhomirov, I.; Trabelsi, K.; Uehara, S.; Ueno, K.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Varner, G.; Vervink, K.; Villa, S.; Vinokurova, A.; Wang, C. C.; Wang, C. H.; Wang, P.; Wang, X. L.; Watanabe, Y.; Wedd, R.; Won, E.; Yamamoto, H.; Yamashita, Y.; Zhang, C. C.; Zhang, Z. P.; Zhulanov, V.; Zupanc, A.
- Issue Date
- Jun-2008
- Publisher
- American Physical Society
- Citation
- Physical Review Letters, v.100, no.25, pp 1 - 6
- Pages
- 6
- Indexed
- SCIE
SCOPUS
- Journal Title
- Physical Review Letters
- Volume
- 100
- Number
- 25
- Start Page
- 1
- End Page
- 6
- ISSN
- 0031-9007
1079-7114
- Abstract
- Using a 492 fb(-1) data sample collected near the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider, we observe the decay B-0 --> p (p) over barK*(0) with a branching fraction of (1.18(-0.25)(+0.29)(stat) +/- 0.11(syst)) x 10(-6). We study the decay dynamics of B-0 --> p (p) over barK(0) and compare with B+ --> p (p) over barK*(+). The K*(0) meson is found to be almost 100% polarized ( with a fraction of (101 +/- 13 +/- 3)% in the helicity zero state), while the K*(+) meson has a (32 +/- 17 +/- 9)% fraction in the helicity zero state. The direct CP asymmetries for B-0 --> p (p) over barK*(0) and B+ --> p (p) over barK*(+) are measured to be -0.08 +/- 0.20 +/- 0.02 and -0.01 +/- 0.19 +/- 0.02, respectively. In addition, we report improved measurements of the branching fractions B(B+ --> p (p) over barK*(+)) = (3.38(-0.60)(+0.73) +/- 0.39) x 10(-6) and B(B-0 --> p (p) over barK(0)) = (2.51(-0.29)(+0.35) +/- 0.21) x 10(-6), which supersede our previous measurements.
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Related Researcher
- Cheon, Byung Gu
- COLLEGE OF NATURAL SCIENCES (DEPARTMENT OF PHYSICS)