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)

  • Esen, S.
  • Schwartz, A. J.
  • Adachi, I.
  • Aihara, H.
  • Arinstein, K.
  • ... Cheon, B. G.
  • 외 122명
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초록

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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제목
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)
저자
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-CChang, P.Chen, A.Chen, P.Cheon, B. G.Chiang, C-CChoi, 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-SHsiung, 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-JKyeong, S-HLange, J. S.Lee, S-HLiu, 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-GSmerkol, 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-ZWang, P.Watanabe, Y.Wedd, R.Wicht, J.Won, E.Yabsley, B. D.Yamashita, Y.Zhang, Z. P.Zhilich, V.Zupanc, A.
DOI
10.1103/PhysRevLett.105.201802
발행일
2010-11
유형
Article
저널명
Physical Review Letters
105
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