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Observation of B-s(0) -> D-s(()*()) + D-s(()*()) Using e(+)e(-) Collisions and a Determination of the B-s-(B)over-bar(s) Width Difference Delta Gamma(s)
- Authors
- Esen, S.; Schwartz, A. J.; Adachi, I.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Aziz, T.; Bakich, A. M.; Balagura, V.; Barberio, E.; Bay, A.; Bischofberger, M.; Bondar, A.; Bozek, A.; Bracko, M.; Browder, T. E.; Chang, M-C; Chang, P.; Chen, A.; Chen, P.; Cheon, B. G.; Chiang, C-C; Choi, Y.; Dalseno, J.; Dash, M.; Dolezal, Z.; Drasal, Z.; Drutskoy, A.; Eidelman, S.; Goldenzweig, P.; Golob, B.; Ha, H.; Haba, J.; Hara, T.; Hayasaka, K.; Higuchi, T.; Hoshi, Y.; Hou, W-S; Hsiung, Y. B.; Hyun, H. J.; Iijima, T.; Inami, K.; Itoh, R.; Iwabuchi, M.; Joshi, N. J.; Julius, T.; Kang, J. H.; Kawasaki, T.; Kichimi, H.; Kim, H. J.; Kim, H. O.; Kim, J. H.; Kim, Y. J.; Kinoshita, K.; Ko, B. R.; Kodys, P.; Korpar, S.; Krizan, P.; Krokovny, P.; Kuhr, T.; Kumita, T.; Kwon, Y-J; Kyeong, S-H; Lange, J. S.; Lee, S-H; Liu, Y.; Liventsev, D.; Louvot, R.; Matyja, A.; McOnie, S.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Nakano, E.; Nakao, M.; Nakazawa, H.; Natkaniec, Z.; Neubauer, S.; Nishida, S.; Nitoh, O.; Ohshima, T.; Okuno, S.; Olsen, S. L.; Pakhlov, P.; Park, C. W.; Park, H.; Park, H. K.; Petric, M.; Piilonen, L. E.; Roehrken, M.; Ryu, S.; Sahoo, H.; Sakai, Y.; Schneider, O.; Schwanda, C.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Shen, C. P.; Shiu, J-G; Smerkol, P.; Solovieva, E.; Staric, M.; Sumisawa, K.; Sumiyoshi, T.; Teramoto, Y.; Trabelsi, K.; Uehara, S.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Varner, G.; Varvell, K. E.; Vervink, K.; Wang, C. H.; Wang, M-Z; Wang, P.; Watanabe, Y.; Wedd, R.; Wicht, J.; Won, E.; Yabsley, B. D.; Yamashita, Y.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.
- Issue Date
- 10-11월-2010
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, v.105, no.20
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW LETTERS
- Volume
- 105
- Number
- 20
- ISSN
- 0031-9007
- Abstract
- We have made the first observation of B-s(0) -> D-s(()*()+) D-s(()*()-) decays using 23.6 fb(-1) of data recorded by the Belle experiment running on the Y(5S) resonance. The branching fractions are measured to be B(B-s(0) -> Ds+Ds-) = (1.03(-0.32-0.25)(+0.39+0.26))% B(B-s(0) -> Ds*D-+/-(s)-/+) = (2.75(-0.71)(+0.83) +/- 0.69)%, and B(B-s(0) -> D-s*(+) D-s*(-)) = (3.08(-1.04-0.86)(+1.22+0.85))%; the sum is B[B-s(0) -> D-s(()*()+) D-s(()*()-)] = (6.85(-1.30-1.80)(+1.53+1.79))%. Assuming B-s(0) -> D-s(()*()+) D-s(()*()-) saturates decays to CP-even final states, the branching fraction determines the ratio Delta Gamma(s)/cos phi, where Delta Gamma(s) is the difference in widths between the two B-s-(B) over bar (s) mass eigenstates, and phi is a CP-violating weak phase. Taking CP violation to be negligibly small, we obtain Delta Gamma(s)/Delta Gamma(s) = 0.147(-0.030)(+0.036)(stat)(-0.041)(+0.042)(syst), where Gamma(s) is the mean decay width.
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