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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents

ID: 544705.0, MPI für Physik / MPI für Physik
Measurement of CP violating asymmetries in B^0 -> K^+K^- K^0_S decays with a time-dependent Dalitz approach
Authors:Belle Collaboration; Nakahama, Y.; Sumisawa, K.; Aihara, H.; Arinstein, K.; Aushev, T.; Aziz, T.; Bakich, A. M.; Balagura, V.; Belous, K.; Bhardwaj, V.; Bischofberger, M.; Bondar, A.; Bonvicini, G.; Bozek, A.; Bracko, M.; Browder, T. E.; Chang, P.; Chao, Y.; Chen, A.; Chen, P.; Cheon, B. G.; Chiang, C. -C.; Cho, I. -S.; Choi, Y.; Dalseno, J.; Das, A.; Dolezal, Z.; Drasal, Z.; Drutskoy, A.; Eidelman, S.; Goldenzweig, P.; Golob, B.; Haba, J.; Hara, K.; Hayasaka, K.; Hazumi, M.; Higuchi, T.; Horii, Y.; Hoshi, Y.; Hou, W. -S.; Hsiung, Y. B.; Hyun, H. J.; Inami, K.; Itoh, R.; Iwabuchi, M.; Iwasaki, M.; Iwasaki, Y.; Julius, T.; Kang, J. H.; Kapusta, P.; Katayama, N.; Kawai, H.; Kawasaki, T.; Kichimi, H.; Kim, H. J.; Kim, J. H.; Kim, M. J.; Ko, B. R.; Kodys, P.; Korpar, S.; Krizan, P.; Krokovny, P.; Kuhr, T.; Kumita, T.; Kyeong, S. -H.; Lee, M. J.; Lee, S. -H.; Louvot, R.; Matyja, A.; McOnie, S.; Miyabayashi, K.; Miyata, H.; Miyazaki, Y.; Mohanty, G. B.; Nakano, E.; Nakao, M.; Nakazawa, H.; Neubauer, S.; Nishida, S.; Nishimura, K.; Nitoh, O.; Nozaki, T.; Ogawa, S.; Ohshima, T.; Olsen, S. L.; Ostrowicz, W.; Ozaki, H.; Park, C. W.; Park, H.; Park, H. K.; Pestotnik, R.; Petric, M.; Piilonen, L. E.; Prim, M.; Sahoo, H.; Sakai, Y.; Schneider, O.; Schwanda, C.; Schwartz, A. J.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Shen, C. P.; Shiu, J. -G.; Shwartz, B.; Smerkol, P.; Solovieva, E.; Stanic, S.; Staric, M.; Sumiyoshi, T.; Teramoto, Y.; Trabelsi, K.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Ushiroda, Y.; Varner, G.; Varvell, K. E.; Vervink, K.; Wang, C. H.; Wang, P.; Wang, X. L.; Watanabe, Y.; Wedd, R.; Won, E.; Yamashita, Y.; Yusa, Y.; Zander, D.; Zhang, Z. P.; Zhilich, V.; Zhou, P.; Zivko, T.; Zupanc, A.
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Physical Review D
Journal Abbrev.:Phys.Rev.D
Issue / Number:82
Start Page:073011
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:We report a measurement of $CP$ violating asymmetries in $B^0(\overline{B}^0) \to K^+ K^- K^0_S$ decays with a time-dependent Dalitz approach. This analysis is based on a data sample of $657\times 10^6$ $B\overline{B}$ pairs accumulated at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. As the result of an unbinned maximum likelihood fit to the selected candidates, the mixing-induced and direct $CP$ violation parameters, $\phi^{\rm eff}_1$ and ${\cal A}_{CP}$ are obtained for $B^0 \to \phi(1020) K^0_S$, $B^0 \to f_0(980) K^0_S$ and other $B^0 \to K^+ K^- K^0_S$ decays. We find four solutions that describe the data. There are \{eqnarray*} \phi_1^{\rm eff}(B^0\to \phi(1020) K^0_S) & = & (32.2 \pm 9.0 \pm 2.6 \pm 1.4)^{\circ}; \phi_1^{\rm eff}(B^0\to \phi(1020) K^0_S) & = & (26.2 \pm 8.8 \pm 2.7 \pm 1.2)^{\circ};\\ \phi_1^{\rm eff}(B^0\to \phi(1020) K^0_S) & = & (27.3 \pm 8.6 \pm 2.8 \pm 1.3)^{\circ}\; {\rm and}\\ \phi_1^{\rm eff}(B^0\to \phi(1020) K^0_S) & = & (24.3 \pm 8.0 \pm 2.9 \pm 5.2)^{\circ}.{eqnarray*}\ The values for the $CP$ violating phase in $B^0\to \phi(1020) K^0_S$ are similar but other properties of the Dalitz plot are quite different for the four solutions. These four solutions have consistent $\phi^{\rm eff}_1$ values for all three $B$ meson decay channels and none of them deviates significantly from the values measured in $B \to (c\bar{c}) K^0$ decays with the currently available statistics. In addition, we find no significant direct $CP$ violation.
Classification / Thesaurus:Belle II
Comment of the Author/Creator:submitted to PRD
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
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