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Measurement of the branching fractions for B-0 -> Ds(*+)pi(-) and B-0 -> Ds*-K+ decays

Authors
Joshi, N. J.Aziz, T.Trabelsi, K.Adachi, I.Aihara, H.Arinstein, K.Aulchenko, V.Aushev, T.Bakich, A. M.Balagura, V.Barberio, E.Bay, A.Belous, K.Bhardwaj, V.Bischofberger, M.Bondar, A.Bozek, A.Bracko, M.Browder, T. E.Chang, M. -C.Chang, P.Chao, Y.Chen, A.Chen, P.Cheon, B. G.Cho, I. -S.Choi, Y.Dalseno, J.Das, A.Dolezal, Z.Drasal, Z.Drutskoy, A.Eidelman, S.Gabyshev, N.Goldenzweig, P.Golob, B.Ha, H.Haba, J.Han, B. -Y.Hayasaka, K.Hayashii, H.Hazumi, M.Horii, Y.Hoshi, Y.Hou, W. -S.Hsiung, Y. B.Hyun, H. J.Iijima, T.Inami, K.Itoh, R.Iwabuchi, M.Iwasaki, M.Iwasaki, Y.Julius, T.Kang, J. H.Kawasaki, T.Kim, H. J.Kim, H. O.Kim, J. H.Kim, S. K.Kim, Y. I.Kim, Y. J.Kinoshita, K.Ko, B. R.Kodys, P.Kreps, M.Krizan, P.Krokovny, P.Kuhr, T.Kuzmin, A.Kwon, Y. -J.Kyeong, S. -H.Lee, M. J.Lee, S. -H.Li, J.Liu, C.Liu, Y.Liventsev, D.Louvot, R.Matyja, A.McOnie, S.Miyabayashi, K.Miyazaki, Y.Mizuk, R.Mori, T.Nakano, E.Nakao, M.Natkaniec, Z.Neubauer, S.Nishida, S.Nishimura, K.Nitoh, O.Ogawa, S.Ohshima, T.Okuno, S.Olsen, S. L.Pakhlova, G.Park, C. W.Park, H.Park, H. K.Petric, M.Piilonen, L. E.Poluektov, A.Ryu, S.Sahoo, H.Sakai, K.Sakai, Y.Schneider, O.Schwanda, C.Schwartz, A. J.Senyo, K.Sevior, M. E.Shapkin, M.Shen, C. P.Shiu, J. -G.Shwartz, B.Singh, J. B.Smerkol, P.Sokolov, A.Solovieva, E.Stanic, S.Staric, M.Stypula, J.Sumiyoshi, T.Taylor, G. N.Teramoto, Y.Uehara, S.Unno, Y.Uno, S.Usov, Y.Varner, G.Varvell, K. E.Vervink, K.Wang, C. H.Wang, M. -Z.Wang, P.Wang, X. L.Watanabe, Y.Wedd, R.Wiechczynski, J.Won, E.Yabsley, B. D.Yamashita, Y.Yamauchi, M.Zhang, C. C.Zhang, Z. P.Zhilich, V.Zivko, T.Zupanc, A.Zyukova, O.
Issue Date
1-2월-2010
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v.81, no.3
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW D
Volume
81
Number
3
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/117012
DOI
10.1103/PhysRevD.81.031101
ISSN
1550-7998
Abstract
We present a study of B-0 -> D-s*(+)pi(-) and B-0 -> D-s*K--(+) decays based on a sample of 657 x 10(6) B (B) over bar events collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We measure the branching fractions to be B(B-0 -> D-s*(+)pi(-)) = (1.75 +/- 0.34(stat) +/- 0.17(syst) +/- 0.11(B)) x 10(-5) and B(B-0 -> D-s*K--(+)) = (2.02 +/- 0.33(stat) +/- 0.18(syst) +/- 0.13(B)) x 10(-5), with significances of 6.1 and 8.0 standard deviations, respectively. The first uncertainty is statistical, the second is due to the experimental systematics, and the third is from uncertainties in the D-s(+) decay branching fractions. From our measurements, we obtain the most precise determination so far of R-D*pi, where R-D*pi is the ratio between amplitudes of the doubly Cabibbo-suppressed decay B-0 -> D*(+)pi(-) and the Cabibbo-favored B-0 -> D*(-)pi(+) decay.
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