Author: "T Hokuue" / Journal: physical review letters - Searchworks@Jio Institute Digital Library Search Results

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262 results on '"T Hokuue"'

1. Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs in e+e- Annihilation at Belle

Author: R, Seidl, K, Hasuko, K, Abe, I, Adachi, H, Aihara, D, Anipko, Y, Asano, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, W, Bartel, A, Bay, U, Bitenc, I, Bizjak, S, Blyth, A, Bozek, M, Bracko, T E, Browder, P, Chang, A, Chen, B G, Cheon, Y, Choi, Y K, Choi, A, Chuvikov, J, Dalseno, M, Danilov, M, Dash, J, Dragic, S, Eidelman, S, Fratina, N, Gabyshev, T, Gershon, A, Go, G, Gokhroo, B, Golob, A, Gorisek, M, Grosse Perdekamp, H C, Ha, K, Hayasaka, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, P, Kapusta, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, S K, Kim, S M, Kim, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, J, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, D, Liventsev, F, Mandl, T, Matsumoto, A, Matyja, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, T, Mori, I, Nakamura, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, A, Ogawa, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, N, Parslow, L S, Peak, R, Pestotnik, L E, Piilonen, Y, Sakai, N, Sato, N, Satoyama, T, Schietinger, O, Schneider, J, Schümann, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, A, Somov, N, Soni, R, Stamen, S, Stanic, M, Staric, K, Sumisawa, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, T, Tsukamoto, S, Uehara, T, Uglov, S, Uno, P, Urquijo, Y, Usov, G, Varner, S, Villa, C C, Wang, C H, Wang, Y, Watanabe, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, Y, Yusa, L M, Zhang, Z P, Zhang, V, Zhilich, and D, Zürcher
Abstract: The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e(+)e(-) annihilation at a center-of-mass energy of 10.52 GeV, which can be attributed to a transverse polarization of the primordial quarks. The measurement was performed using a sample of 79 x 10(6) hadronic events collected with the Belle detector.
Published: 2006

2. Time-DependentCP-Violating Asymmetry inB0→ρ0γDecays

Author: N. Taniguchi, S. Nishida, K. Vervink, G. R. Moloney, X. L. Wang, S. Uehara, Hikaru Kawai, A. Ishikawa, H. Ha, D. Epifanov, Y. Sakai, J. G. Shiu, S. E. Lee, Hirokazu Ishino, F. Takasaki, P. Križan, T. Aushev, Hirokazu Miyake, Andrey Sokolov, U. Bitenc, Phillip Urquijo, T. Nozaki, S. Eidelman, Y. Chao, P. Pakhlov, I. Adachi, J. H. Kang, M. Z. Wang, Vladislav Balagura, S. L. Olsen, K. Kinoshita, C. C. Wang, I. S. Cho, J. B. Singh, H. J. Hyun, D. Mohapatra, S. Villa, C. W. Park, E. Won, H. Park, A. Bozek, Seema Bahinipati, Y. Choi, Samo Stanič, Osamu Tajima, A. Yamaguchi, Y. Miyazaki, K. Sumisawa, T. Hara, S. W. Lin, I. Tikhomirov, A. Chen, J. Dalseno, S. Uno, T. Hokuue, E. L. Barberio, A. Zupanc, T. E. Browder, M. Shapkin, Z. P. Zhang, B. G. Cheon, F. Mandl, C. H. Wang, Y. J. Kim, A.E. Bondar, P. Krokovny, O. Nitoh, Y. Yamashita, Yasushi Nagasaka, D. H. Kah, K. Trabelsi, K. Tamai, C. C. Kuo, W. T. Chen, M. Yamauchi, Masashi Hazumi, C. P. Shen, M. E. Sevior, Rahul Kumar, K. Hara, M. J. Lee, P. Chang, K. Belous, S. Korpar, M. Bračko, A. M. Bakich, B. Shwartz, T. Ohshima, K. Inami, S. Okuno, H. Sahoo, O. Zyukova, N. Gabyshev, M. Dash, T. Uglov, Y. Teramoto, Bruce Yabsley, Y. Unno, H. Miyata, Y. Ushiroda, Y. Hoshi, S. Ogawa, T. Sumiyoshi, M. Nakao, J. Schümann, K. Hayasaka, S. McOnie, L. E. Piilonen, G. Pakhlova, B. Golob, Tatiana Medvedeva, R. Chistov, H. Aihara, Y. Usov, Y. Watanabe, H. Kichimi, T. Lesiak, M. Tanaka, J. Haba, D. Heffernan, W. S. Hou, K. Arinstein, Alexei Kuzmin, D. Liventsev, G. S. Varner, R. Itoh, P. Wang, K. Senyo, K. Ueno, T. Kawasaki, A. Somov, K. Miyabayashi, H. Nakazawa, A. J. Schwartz, R. Mizuk, S. Noguchi, Y. Iwasaki, Y. J. Kwon, O. Schneider, L. S. Peak, M. Starič, and H. Shibuya
Subjects: Physics, Particle physics, media_common.quotation_subject, General Physics and Astronomy, Asymmetry, media_common
Published: 2008

3. Search for theCP-Violating DecaysΥ(4S)→B0B¯0→J/ψKS0+J/ψ(ηc)KS0

Author: O. Tajima, M. Hazumi, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, V. Bhardwaj, U. Bitenc, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, P. Chang, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, C.-C. Chiang, R. Chistov, I.-S. Cho, Y. Choi, Y. K. Choi, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, A. Go, G. Gokhroo, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, J. H. Kang, S. U. Kataoka, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, Y.-J. Kwon, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, F. Mandl, D. Marlow, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, A. Sekiya, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J.-G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, A. Vinokurova, C. C. Wang, C. H. Wang, M.-Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, and A. Zupanc
Subjects: Physics, Particle physics, KEKB, Meson, law, Signal Sensitivity, General Physics and Astronomy, Collider, law.invention, B-factory, Bar (unit)
Abstract: We report the first search for CP violating decays of the $\Upsilon(4S)$ using a data sample that contains 535 million $\Upsilon(4S)$ mesons with the Belle detector at the KEKB asymmetric-energy e^+ e^- collider. A partial reconstruction technique is employed to enhance the signal sensitivity. No significant signals were observed. We obtain an upper limit of $4 \times 10^{-7}$ at the 90 % confidence level for the branching fractions of the $CP$ violating modes, $\Upsilon(4S) \to B^0\bar{B}^0 \to J/\psi K^0_S + J/\psi(\eta_c) K^0_S$. Extrapolating the result, we find that an observation with 5$\sigma$ significance is expected with a 30 ab^{-1} data sample, which is within the reach of a future super B factory.
Published: 2007

4. Observation ofB0→D*−τ+ντDecay at Belle

Author: Kevin Varvell, A. Matyja, R. Mizuk, T. Mori, Y. Yamashita, A. Yamaguchi, H. J. Hyun, Jasvinder A. Singh, S. W. Lin, T. Iijima, Y. Miyazaki, Joowon Lee, Yoshinobu Unno, C. C. Wang, P. Krokovny, Zhenyu Zhang, S. Fratina, K. F. Chen, T. Hokuue, T. E. Browder, I. S. Cho, S. Uehara, Young-Il Choi, K. Miyabayashi, H. Ha, N. Katayama, Y. Choi, S. Bahinipati, Y. Kozakai, M. C. Chang, Yu-xi Liu, W. S. Hou, I. Nakamura, S. Uno, C. Schwanda, K. Trabelsi, Rakesh Kumar, C. H. Wang, K. S. Park, I. Bedny, Y. Iwasaki, Y. J. Kwon, C. C. Kuo, C. P. Shen, H. Miyake, S. Shinomiya, M. Yamauchi, I. Adachi, Vladislav Balagura, S. L. Olsen, A. Somov, O. Schneider, P. Pakhlov, Andrey Sokolov, S. Villa, M. Dash, A. Bondar, T. Sumiyoshi, M. Shapkin, M. Nakao, K. Vervink, B. Golob, V. Bhardwaj, H. Park, A. Bozek, H. Miyata, U. Bitenc, S. Korpar, Jolanta Brodzicka, Y. Hoshi, Y. J. Kim, H. Ozaki, H. Shibuya, H. Palka, L. E. Piilonen, H. Kaji, S. McOnie, Y. Sakai, A. J. Schwartz, M. H. Tanaka, J. G. Shiu, G. Pakhlova, J. Schümann, M. Starič, K. Hayasaka, J. H. Kang, P. Chang, S. Nishida, E. Won, Phillip Urquijo, Tatiana Medvedeva, R. Pestotnik, Hirokazu Ishino, Osamu Tajima, A. Zupanc, R. Chistov, K. Sumisawa, T. Hara, H. Kawai, B. G. Cheon, S. Eidelman, S. Okuno, O. Nitoh, K. Ikado, A. Chen, Yasushi Nagasaka, T. Aushev, Hiroaki Aihara, Y. Teramoto, Bruce Yabsley, D. Liventsev, S. Ogawa, G. S. Varner, Masashi Hazumi, R. Itoh, J. Dalseno, P. Wang, K. Senyo, T. Kawasaki, A. Ishikawa, S. E. Lee, T. Nozaki, F. Takasaki, P. Križan, J. Haba, D. Heffernan, H. Kichimi, T. Lesiak, F. Mandl, M. E. Sevior, K. Kinoshita, G. N. Taylor, V. M. Aulchenko, E. L. Barberio, M. Rozanska, S. Kajiwara, Y. Ushiroda, K. Inami, Y. Watanabe, Samo Stanič, A. M. Bakich, Z. Natkaniec, T. Ohshima, N. Gabyshev, and M. Bračko
Subjects: Physics, Nuclear physics, Particle physics, KEKB, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, High Energy Physics::Experiment
Abstract: We report an observation of the decay B-0 -> D*-tau(+)nu(tau) in a data sample containing 535x10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We find a signal with a significance of 5.2 sigma and measure the branching fraction B(B-0 -> D*-tau(+)nu(tau))=(2.02(-0.37)(+0.40)(stat)+/- 0.37(syst))%. This is the first observation of an exclusive B decay with a b -> c tau nu(tau) transition.
Published: 2007

5. Measurement of thee+e−→π+π−J/ψCross Section Via Initial-State Radiation at Belle

Author: J. Haba, D. Heffernan, M. H. Tanaka, J. G. Shiu, S. Fratina, T. E. Browder, T. Iijima, H. Kichimi, F. Mandl, Vladimir Zhulanov, M. E. Sevior, T. Lesiak, Andrey Sokolov, M. Danilov, J. H. Kang, C. C. Kuo, Yu-xi Liu, I. Adachi, D. Liventsev, M. Dash, L. S. Peak, G. S. Varner, H. Kawai, S. Nishida, H. J. Hyun, S. Villa, R. Itoh, A. Somov, B. Golob, J. Dalseno, I. Tikhomirov, A. Zupanc, P. Wang, Yu. V. Usov, X. L. Wang, I. Bedny, Yasushi Nagasaka, T. Sumiyoshi, O. Nitoh, Kevin Varvell, R. Mizuk, Y. Sakai, Y. Watanabe, A. Matyja, V.N. Zhilich, Y. Miyazaki, A. Ishikawa, S. E. Lee, F. Takasaki, M. Starič, T. Hokuue, P. Križan, P. Pakhlov, A. Bondar, A. Yamaguchi, W. A. Mitaroff, M. Shapkin, Jasvinder A. Singh, S. W. Lin, E. Won, Daniel Robert Marlow, S. Korpar, Jolanta Brodzicka, B. Shwartz, R. Seidl, H. Park, A. Bozek, K. Senyo, C. C. Wang, Hiroaki Aihara, K. F. Chen, K. Miyabayashi, Y. J. Kim, S. Uno, H. Ozaki, T. Kawasaki, C. Z. Yuan, M. C. Chang, Yoshinobu Unno, Tatiana Medvedeva, S. Uehara, H. Hayashii, H. Ha, Rakesh Kumar, Y. Choi, W. S. Hou, M. Bračko, N. Katayama, H. Palka, L. E. Piilonen, Y. Iwasaki, Y. J. Kwon, S. Bahinipati, V. M. Aulchenko, G. Pakhlova, M. Nakao, E. L. Barberio, A.S. Kuzmin, B. G. Cheon, Toru Mori, O. Schneider, S. McOnie, H. Miyake, Z. Natkaniec, T. Ohshima, K. S. Park, R. Chistov, A. Chen, U. Bitenc, H. Miyata, Y. Hoshi, N. Gabyshev, Vladislav Balagura, J. Schümann, K. Hayasaka, S. L. Olsen, D. H. Kah, Y. B. Hsiung, K. Inami, S. Eidelman, K. Kinoshita, G. N. Taylor, A. Vinokurova, P. Krokovny, C. P. Shen, K. Vervink, Zhenyu Zhang, Y. Yamashita, S. Ogawa, I. S. Cho, S. Okuno, T. Aushev, Y. Teramoto, Bruce Yabsley, C. H. Wang, H. Kaji, W. T. Chen, P. Chang, K. Ikado, Masashi Hazumi, C. C. Zhang, and H. Shibuya
Subjects: Nuclear physics, Physics, KEKB, Annihilation, Pair production, Positron, Electron–positron annihilation, General Physics and Astronomy, Resonance, State (functional analysis), Electron, Atomic physics
Abstract: The cross section for e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}J/{psi} between 3.8 and 5.5 GeV/c{sup 2} is measured using a 548 fb{sup -1} data sample collected on or near the {upsilon}(4S) resonance with the Belle detector at KEKB. A peak near 4.25 GeV/c{sup 2}, corresponding to the so called Y(4260), is observed. In addition, there is another cluster of events at around 4.05 GeV/c{sup 2}. A fit using two interfering Breit-Wigner shapes describes the data better than one that uses only the Y(4260), especially for the lower-mass side of the 4.25 GeV enhancement.
Published: 2007

6. Measurement ofD0−D¯0Mixing Parameters inD0→Ksπ+π−Decays

Author: S. Shinomiya, A. M. Bakich, Y. Sakai, Z. Natkaniec, T. Ohshima, Samo Stanič, V.N. Zhilich, N. Gabyshev, W. S. Hou, M. J. Lee, M. Bračko, S. Okuno, Antonio Limosani, Long Zhang, K. F. Chen, A. Vinokurova, W. A. Mitaroff, H. J. Hyun, H. Kichimi, Anton Poluektov, Y. Yamashita, S. Fratina, Young-Il Choi, K. Vervink, Y. Iwasaki, Y. J. Kwon, S. Uehara, Y. Miyazaki, T. Iijima, K. Sumisawa, B. G. Cheon, T. Tsuboyama, T. Lesiak, T. Sumiyoshi, P. Krokovny, T. Aushev, E. Won, Z. P. Zhang, O. Schneider, T. Hokuue, K. Ikado, H. Ha, Y. Teramoto, Bruce Yabsley, Osamu Tajima, H. Miyata, A. Zupanc, S. Kajiwara, N. Tamura, Y. Hoshi, J. Haba, D. Epifanov, T. Matsumoto, Yu-xi Liu, H. Stoeck, L. S. Peak, R. Mizuk, K. Tamai, O. Nitoh, H. Hayashii, M. Dash, M. E. Sevior, A. Bondar, Motoki Iwasaki, A. Kuzmin, P. L. Wang, J. B. Singh, J. Schümann, N. C. Hastings, K. Hayasaka, B. Golob, W. Ostrowicz, K. Senyo, K. Belous, S. Korpar, Jolanta Brodzicka, A. Drutskoy, Ho Kim, H. Kaji, S. Ogawa, K. Ueno, T. Kawasaki, R. Seidl, M. Tanaka, Vladislav Balagura, S. L. Olsen, I. S. Cho, W. T. Chen, C. Z. Yuan, S. K. Kim, P. Chang, M. Starič, U. Bitenc, Masashi Hazumi, Y. Onuki, M. Yamauchi, J. G. Shiu, A. Matyja, I. Nakamura, D. H. Kah, D. Liventsev, C. H. Wang, Y. B. Hsiung, Y. Unno, K. Inami, Y. Chao, Phillip Urquijo, H. Aihara, S. Uno, X. C. Tian, C. Schwanda, V. M. Aulchenko, I. Adachi, H. Sahoo, Rakesh Kumar, G. S. Varner, E. L. Barberio, S. Villa, R. Itoh, T. Uglov, L. E. Piilonen, Yu. V. Usov, M. Nakao, D. Heffernan, G. Pakhlova, M. Z. Wang, C. C. Zhang, K. Kinoshita, H. Shibuya, Y. Watanabe, Tatiana Medvedeva, S. Suzuki, S. McOnie, Hirokazu Ishino, H. J. Kim, B. Shwartz, H. Miyake, H. Kawai, A. Somov, I. Tikhomirov, A. Chen, G. N. Taylor, Yasushi Nagasaka, M. Shapkin, Y. J. Kim, H. Ozaki, E. Nakano, A. Yamaguchi, R. Pestotnik, S. W. Lin, N. J. Joshi, J. Li, G. Gokhroo, A. J. Schwartz, Andrey Sokolov, J. H. Kang, J. Dalseno, A. Ishikawa, A. Bay, S. E. Lee, F. Takasaki, C. W. Park, P. Križan, C. C. Chiang, Y. Choi, T. Hara, S. Nishida, N. Soni, Joowon Lee, T. E. Browder, M. Danilov, C. C. Kuo, S. Eidelman, P. Pakhlov, H. Park, and A. Bozek
Subjects: Physics, Particle physics, Particle decay, KEKB, Pion, Meson, Hadron, General Physics and Astronomy, CP violation, Dalitz plot, Elementary particle
Abstract: We report a measurement of D0-D(0) mixing parameters in D(0) --> K(s)(0) pi(+) pi(-) decays using a time-dependent Dalitz-plot analysis. We first assume CP conservation and subsequently allow for CP violation. The results are based on 540 fb(-1) of data accumulated with the Belle detector at the KEKB e(+)e(-) collider. Assuming negligible CP violation, we measure the mixing parameters x = (0.80 +/- 0.29(-0.07-0.14)(+0.09+0.10))% and y = (0.33+/-0.24(-0.12-0.08)(+0.08+0.06))%, where the errors are statistical, experimental systematic, and systematic due to the Dalitz decay model, respectively. Allowing for CP violation, we obtain the CP-violating parameters |q / p| = 0.86(-0.29-0.03)(+0.30+0.06) +/- 0.08 and arg(q/p) = (-14(-18-3-4)(+16+5+2)) degrees .
Published: 2007

7. Measurement of Einstein-Podolsky-Rosen-Type Flavor Entanglement inΥ(4S)→B0B¯0Decays

Author: L. S. Peak, M. Nakao, M. Starič, S. McOnie, Motoki Iwasaki, K. Senyo, H. J. Kim, K. Ueno, T. Kawasaki, D. Liventsev, I. Bizjak, G. S. Varner, W. S. Hou, R. Itoh, H. Stoeck, M. Yamauchi, T. Tsukamoto, N. Soni, E. Nakano, H. Shibuya, Masashi Hazumi, A. Ishikawa, A. Bay, A. Zupanc, G. Gokhroo, M. Shapkin, J. B. Singh, A. Matyja, S. Cole, F. Takasaki, Y. Iwasaki, A. Drutskoy, Y. J. Kwon, A. J. Schwartz, O. Nitoh, C. W. Park, P. Križan, T. Iijima, Y. J. Kim, K. Trabelsi, M. Z. Wang, K. Kinoshita, P. Krokovny, A. Yamaguchi, O. Schneider, B. Shwartz, T. Mori, H. Aihara, S. W. Lin, J. S. H. Lee, Y. Miyazaki, Y. Sakai, E. Won, R. Mizuk, M. D. Peters, V.N. Zhilich, M. Tanaka, Y. Onuki, A. Imoto, A. M. Bakich, Hirokazu Ishino, D. Epifanov, Z. Natkaniec, T. Ohshima, T. Hokuue, H. Sahoo, J. H. Kang, W. A. Mitaroff, S. R. Hou, G. N. Taylor, S. Fratina, T. J. Gershon, C. H. Wang, T. Uglov, C. C. Wang, Y. Choi, V. M. Aulchenko, Young-Il Choi, M. Dash, Antonio Limosani, Y. Yamashita, R. Pestotnik, A. Go, Z. P. Zhang, E. L. Barberio, B. Golob, N. Gabyshev, J. S. Lange, W. T. Chen, T. Matsumoto, J. Dalseno, S. L. Olsen, Byung Gu Cheon, Yu-xi Liu, X. C. Tian, P. Chang, U. Bitenc, H. Miyata, Y. Hoshi, Q. L. Xie, D. Heffernan, K. Inami, S. Uno, Kazuo Abe, N. C. Hastings, K. Hayasaka, S. Blyth, I. Tikhomirov, A. Chen, Samo Stanič, H. Miyake, Andrej Gorišek, T. Aushev, A. Somov, A. Kuzmin, N. Satoyama, Y. Teramoto, Bruce Yabsley, J. Schümann, H. Hayashii, S. Ogawa, M. J. Lee, Y. Chao, C. Jacoby, M. Bračko, H. R. Khan, Y. Watanabe, H. Kichimi, T. Tsuboyama, T. Lesiak, K. Ikado, T. E. Browder, S. Villa, M. Danilov, C. C. Kuo, S. Eidelman, P. Pakhlov, H. Park, A. Bozek, S. Nishida, D. Anipko, S. K. Kim, Y. Unno, K. F. Chen, S. Uehara, H. Ha, N. Katayama, R. Seidl, K. Belous, S. Korpar, Rakesh Kumar, H. Palka, L. E. Piilonen, J. Wicht, T. Schietinger, G. Pakhlova, R. Kulasiri, R. Chistov, and T. Sumiyoshi
Subjects: Physics, Particle physics, Quantum decoherence, Quark model, General Physics and Astronomy, Quantum Physics, Quantum entanglement, symbols.namesake, Pair production, Quantum mechanics, symbols, High Energy Physics::Experiment, B meson, EPR paradox, Einstein, Boson
Abstract: The neutral B meson pair produced at the Upsilon(4S) should exhibit a nonlocal correlation of the type discussed by Einstein, Podolsky, and Rosen. We measure this correlation using the time-dependent flavor asymmetry of semileptonic B(0) decays, which we compare with predictions from quantum mechanics and two local realistic models. The data are consistent with quantum mechanics, and inconsistent with the other models. Assuming that some B pairs disentangle to produce B(0) and B(0) with definite flavor, we find a decoherent fraction of 0.029 +/ -0.057, consistent with no decoherence.
Published: 2007

8. Time-dependent CP-violating asymmetry in B0--rho0gamma decays

Author: Y, Ushiroda, K, Sumisawa, N, Taniguchi, I, Adachi, H, Aihara, K, Arinstein, T, Aushev, S, Bahinipati, A M, Bakich, V, Balagura, E, Barberio, K, Belous, U, Bitenc, A, Bondar, A, Bozek, M, Bracko, T E, Browder, P, Chang, Y, Chao, A, Chen, W T, Chen, B G, Cheon, R, Chistov, I-S, Cho, Y, Choi, J, Dalseno, M, Dash, S, Eidelman, D, Epifanov, N, Gabyshev, B, Golob, H, Ha, J, Haba, K, Hara, T, Hara, K, Hayasaka, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, W-S, Hou, H J, Hyun, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, Y, Iwasaki, D H, Kah, J H, Kang, H, Kawai, T, Kawasaki, H, Kichimi, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, M J, Lee, S E, Lee, T, Lesiak, S-W, Lin, D, Liventsev, F, Mandl, S, McOnie, T, Medvedeva, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, D, Mohapatra, G R, Moloney, Y, Nagasaka, M, Nakao, H, Nakazawa, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, P, Pakhlov, G, Pakhlova, C W, Park, H, Park, L S, Peak, L E, Piilonen, H, Sahoo, Y, Sakai, O, Schneider, J, Schümann, A J, Schwartz, K, Senyo, M E, Sevior, M, Shapkin, C P, Shen, H, Shibuya, J-G, Shiu, B, Shwartz, J B, Singh, A, Sokolov, A, Somov, S, Stanic, M, Staric, T, Sumiyoshi, O, Tajima, F, Takasaki, K, Tamai, M, Tanaka, Y, Teramoto, I, Tikhomirov, K, Trabelsi, S, Uehara, K, Ueno, T, Uglov, Y, Unno, S, Uno, P, Urquijo, Y, Usov, G, Varner, K, Vervink, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, P, Wang, X L, Wang, Y, Watanabe, E, Won, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, Z P, Zhang, A, Zupanc, and O, Zyukova
Abstract: We report the first measurement of CP-violation parameters in B0--rho0gamma decays based on a data sample of 657x10(6)BB pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the time-dependent and direct CP-violating parameters, Srho0gamma=-0.83+/-0.65(stat)+/-0.18(syst) and Arho0gamma=-0.44+/-0.49(stat)+/-0.14(syst), respectively.
Published: 2007

9. Measurements of Branching Fractions forB→KπandB→ππDecays

Author: S.-W. Lin, P. Chang, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, E. Barberio, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, A. Go, B. Golob, H. Ha, J. Haba, T. Hara, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, P. Kapusta, S. U. Kataoka, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, A. Kuzmin, Y.-J. Kwon, M. J. Lee, T. Lesiak, D. Liventsev, J. MacNaughton, F. Mandl, T. Matsumoto, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, G. R. Moloney, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, J. Wicht, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, C. C. Zhang, Z. P. Zhang, and A. Zupanc
Subjects: Nuclear physics, Physics, Pair production, KEKB, Branching fraction, Pi, Analytical chemistry, General Physics and Astronomy, Branching (polymer chemistry)
Abstract: We report measurements of branching fractions for B -> K pi and B ->pi pi decays based on a data sample of 449x10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We also measure the ratios of partial widths for B -> K pi decays, namely R-c equivalent to 2 Gamma(B+-> K+pi(0))/Gamma(B+-> K-0 pi(+))=1.08 +/- 0.06 +/- 0.08 and R-n equivalent to Gamma(B-0 -> K+pi(-))/2 Gamma(B-0 -> K-0 pi(0))=1.08 +/- 0.08 +/- 0.08, where the first and the second errors are statistical and systematic, respectively. These ratios are sensitive to enhanced electroweak penguin contributions from new physics; the new measurements are, however, consistent with standard model expectations.
Published: 2007

10. Measurement of the e+e- --pi+pi- J/psi cross section via initial-state radiation at Belle

Author: C Z, Yuan, C P, Shen, P, Wang, S, McOnie, I, Adachi, H, Aihara, V, Aulchenko, T, Aushev, S, Bahinipati, V, Balagura, E, Barberio, I, Bedny, U, Bitenc, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, M-C, Chang, P, Chang, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, I-S, Cho, Y, Choi, J, Dalseno, M, Danilov, M, Dash, S, Eidelman, S, Fratina, N, Gabyshev, B, Golob, H, Ha, J, Haba, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, W-S, Hou, Y B, Hsiung, H J, Hyun, T, Iijima, K, Ikado, K, Inami, A, Ishikawa, R, Itoh, Y, Iwasaki, D H, Kah, H, Kaji, J H, Kang, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, S E, Lee, T, Lesiak, S-W, Lin, Y, Liu, D, Liventsev, F, Mandl, D, Marlow, A, Matyja, T, Medvedeva, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, T, Mori, Y, Nagasaka, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Palka, H, Park, K S, Park, L S, Peak, L E, Piilonen, Y, Sakai, O, Schneider, J, Schümann, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, J-G, Shiu, B, Shwartz, J B, Singh, A, Sokolov, A, Somov, M, Staric, T, Sumiyoshi, F, Takasaki, M, Tanaka, G N, Taylor, Y, Teramoto, I, Tikhomirov, S, Uehara, Y, Unno, S, Uno, Y, Usov, G, Varner, K E, Varvell, K, Vervink, S, Villa, A, Vinokurova, C C, Wang, C H, Wang, X L, Wang, Y, Watanabe, E, Won, B D, Yabsley, A, Yamaguchi, Y, Yamashita, C C, Zhang, Z P, Zhang, V, Zhilich, V, Zhulanov, and A, Zupanc
Abstract: The cross section for e(+)e(-)--pi(+)pi(-)J/psi between 3.8 and 5.5 GeV/c(2) is measured using a 548 fb(-1) data sample collected on or near the Upsilon(4S) resonance with the Belle detector at KEKB. A peak near 4.25 GeV/c(2), corresponding to the so called Y(4260), is observed. In addition, there is another cluster of events at around 4.05 GeV/c(2). A fit using two interfering Breit-Wigner shapes describes the data better than one that uses only the Y(4260), especially for the lower-mass side of the 4.25 GeV enhancement.
Published: 2007

11. Measurement of theτLepton Mass and an Upper Limit on the Mass Difference betweenτ+andτ−

Author: K. Belous, M. Shapkin, A. Sokolov, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, M. Fujikawa, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, H. Ha, J. Haba, Y. Hasegawa, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, O. Schneider, J. Schümann, R. Seidl, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, A. Vinokurova, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, and A. Zupanc
Subjects: Nuclear physics, Physics, Particle decay, Particle physics, Pion, Relative mass, General Physics and Astronomy, Limit (mathematics), Lepton, Standard Model
Abstract: The mass of the τ lepton has been measured in the decay mode τ→3πντ using a pseudomass technique. The result obtained from 414fb-1 of data collected with the Belle detector is Mτ=[1776.61±0. 13(stat)±0.35(sys)]MeV/c2. The upper limit on the relative mass difference between positive and negative τ leptons is |Mτ+-Mτ-|/ Mτ
Published: 2007

12. Search for B --h(*)nunu[over ] decays at Belle

Author: K-F, Chen, I, Adachi, H, Aihara, V, Aulchenko, T, Aushev, S, Bahinipati, A M, Bakich, V, Balagura, E, Barberio, A, Bay, K, Belous, U, Bitenc, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, M-C, Chang, P, Chang, Y, Chao, A, Chen, B G, Cheon, C-C, Chiang, I-S, Cho, Y, Choi, Y K, Choi, S, Cole, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, S, Fratina, N, Gabyshev, B, Golob, H, Ha, J, Haba, T, Hara, K, Hayasaka, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, W-S, Hou, Y B, Hsiung, H J, Hyun, T, Iijima, K, Ikado, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, Y, Iwasaki, N J, Joshi, S, Kajiwara, J H, Kang, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lee, S E, Lee, T, Lesiak, S-W, Lin, Y, Liu, D, Liventsev, F, Mandl, D, Marlow, A, Matyja, S, McOnie, T, Medvedeva, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, Y, Nagasaka, I, Nakamura, M, Nakao, S, Nishida, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Park, K S, Park, R, Pestotnik, L E, Piilonen, Y, Sakai, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, C P, Shen, H, Shibuya, S, Shinomiya, J-G, Shiu, B, Shwartz, J B, Singh, A, Sokolov, A, Somov, S, Stanic, M, Staric, K, Sumisawa, T, Sumiyoshi, O, Tajima, F, Takasaki, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, I, Tikhomirov, K, Trabelsi, S, Uehara, K, Ueno, T, Uglov, Y, Unno, S, Uno, P, Urquijo, Y, Usov, G, Varner, K E, Varvell, K, Vervink, S, Villa, A, Vinokurova, C C, Wang, C H, Wang, M-Z, Wang, P, Wang, Y, Watanabe, R, Wedd, E, Won, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, C C, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc
Abstract: We present a search for the rare decays B --h(*)nunu[over ], where h(*) stands for a light meson. A data sample of 535 x 10{6} BB[over ] pairs collected with the Belle detector at the KEKB e{+}e{-} collider is used. Signal candidates are required to have an accompanying B meson fully reconstructed in a hadronic mode and signal side particles consistent with a single h(*) meson. No significant signal is observed and we set upper limits on the branching fractions at 90% confidence level. The limits on B{0} --K{*0}nunu[over ] and B{+} --K{+}nunu[over ] decays are more stringent than the previous constraints, while the first searches for B{0} --K{0}nunu[over ], pi{0}nunu[over ], rho{0}nunu[over ], varphinunu[over ] and B{+} --K{*+}nunu[over ], rho{+}nunu[over ] are reported.
Published: 2007

13. Observation of B(0)--D(*-)tau(+)nu(tau) decay at Belle

Author: A, Matyja, M, Rozanska, I, Adachi, H, Aihara, V, Aulchenko, T, Aushev, S, Bahinipati, A M, Bakich, V, Balagura, E, Barberio, I, Bedny, V, Bhardwaj, U, Bitenc, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, M-C, Chang, P, Chang, A, Chen, K-F, Chen, B G, Cheon, R, Chistov, I-S, Cho, Y, Choi, Y K, Choi, J, Dalseno, M, Dash, S, Eidelman, S, Fratina, N, Gabyshev, B, Golob, H, Ha, J, Haba, T, Hara, K, Hayasaka, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, W-S, Hou, H J, Hyun, T, Iijima, K, Ikado, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, Y, Iwasaki, H, Kaji, S, Kajiwara, J H, Kang, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, Y J, Kim, K, Kinoshita, S, Korpar, Y, Kozakai, P, Krizan, P, Krokovny, R, Kumar, C C, Kuo, Y-J, Kwon, J S, Lee, S E, Lee, T, Lesiak, S-W, Lin, Y, Liu, D, Liventsev, F, Mandl, S, McOnie, T, Medvedeva, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, T, Mori, Y, Nagasaka, I, Nakamura, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Palka, H, Park, K S, Park, R, Pestotnik, L E, Piilonen, Y, Sakai, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, K, Senyo, M E, Sevior, M, Shapkin, C P, Shen, H, Shibuya, S, Shinomiya, J-G, Shiu, J B, Singh, A, Sokolov, A, Somov, S, Stanic, M, Staric, K, Sumisawa, T, Sumiyoshi, O, Tajima, F, Takasaki, M, Tanaka, G N, Taylor, Y, Teramoto, K, Trabelsi, S, Uehara, Y, Unno, S, Uno, P, Urquijo, Y, Ushiroda, G, Varner, K E, Varvell, K, Vervink, S, Villa, C C, Wang, C H, Wang, P, Wang, Y, Watanabe, E, Won, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, Z P, Zhang, and A, Zupanc
Abstract: We report an observation of the decay B{0}--D{*-}tau{+}nu{tau} in a data sample containing 535x10{6} BB pairs collected with the Belle detector at the KEKB asymmetric-energy e{+}e{-} collider. We find a signal with a significance of 5.2sigma and measure the branching fraction B(B{0}--D{*-}tau{+}nu{tau})=(2.02{-0.37}{+0.40}(stat)+/-0.37(syst))%. This is the first observation of an exclusive B decay with a b--ctaunu{tau} transition.
Published: 2007

14. Experimental Constraints on the Spin and Parity of theΛc(2880)+

Author: Masashi Hazumi, S. Cole, Masahiro Fujikawa, L. S. Peak, K. Tanabe, P. Goldenzweig, J. S. H. Lee, R. Dowd, J. S. Kang, Takashi Kubota, Y. Uchida, G. R. Moloney, M. Grosse Perdekamp, N. Tamura, H. Stoeck, P. Krizan, H. Sahoo, B. Golob, James Mueller, A.E. Bondar, P. Krokovny, Z. Natkaniec, T. Uglov, Yoji Hasegawa, C. W. Park, E. Won, H. Sakaue, Y.T. Tsai, Yu Nakahama, Daniel Robert Marlow, Marco Barbero, K. Trabelsi, S. Banerjee, A. Murakami, Y. Iwasaki, V.N. Zhilich, W. A. Mitaroff, Young-Il Choi, K. Miyabayashi, B. Shwartz, T. Ziegler, Y. J. Kwon, O. Schneider, M. Yamauchi, Tariq Aziz, N. Kikuchi, Seema Bahinipati, R. Seidl, K. Hoshina, S. Nishida, Tapas Sarangi, M. Rozanska, Kevin Varvell, M. Shapkin, K. Aoki, M. Dash, J.H. Choi, Y. Choi, M. Iwabuchi, D. Epifanov, M. Starič, Yuji Enari, T. Higuchi, T. Seki, H. Nakazawa, G. Gokhroo, T. Hara, A. J. Schwartz, A. Matyja, Ilija Bizjak, V.A. Sidorov, M. Z. Wang, K. Kinoshita, S. Saitoh, Y.-T. Shen, K. Uchida, T. Aushev, R. Mizuk, Y.-J. Lee, V. M. Aulchenko, D. Anipko, H. Guler, S. Yoshino, K. S. Park, Antonio Limosani, N. Soni, M. C. Chang, Kimitaka Itoh, A. Kuzmin, J. S. Lange, J. Dragic, Vladislav Balagura, S. L. Olsen, H. Fujii, T. Mori, E. L. Barberio, Rakesh Kumar, Y. Usov, Y. F. Liu, Hiroshi Sakamoto, N. Takada, H. Palka, L. E. Piilonen, M. Bračko, S. Fratina, G. N. Taylor, T. Schietinger, Z. P. Zhang, G. Pakhlova, R. Kulasiri, S. Ogawa, S. Ono, Y. Igarashi, C. C. Wang, M. Pernicka, T. Matsumoto, W. S. Hou, W. Ostrowicz, A. Go, I. Adachi, K. Arinstein, Y. Mikami, E. Nakano, Y. Ushiroda, Y. Sakai, Sadaharu Uehara, E. Kurihara, Akito Kusaka, H. Miyake, R. Chistov, H. O. Kim, Y.F. Tse, A. Somov, Jie Zhang, A. Yamaguchi, Samo Stanič, A. Kibayashi, S. Uno, C. Schwanda, K. Inami, A. Imoto, S. R. Hou, M. Nakao, I. Bedny, J. Li, Gobinda Majumder, S. Noguchi, S. McOnie, S. Y. Suzuki, A. M. Bakich, T. Ohshima, J. MacNaughton, Anton Poluektov, Osamu Tajima, K. Nishimura, T. Tsukamoto, J. B. Singh, S. K. Choi, T. E. Browder, N. Gabyshev, You-Jin Yuan, K. Sumisawa, S. Villa, Y. Miyazaki, N. Satoyama, P. Schonmeier, T. J. Gershon, K. Neichi, A. Zupanc, A. Chuvikov, L. Hinz, H. Hayashii, Hyunyong Kim, S. L. Blyth, T. Hokuue, A. Sokolov, K. Ikado, M. Danilov, C. C. Kuo, O. Nitoh, I. Nakamura, Y. Kozakai, Y. Ban, K. Hara, Y. Yusa, S. U. Kataoka, T. Sumiyoshi, Jeremy Dalseno, Y. B. Hsiung, K. Sayeed, S. Eidelman, C.Y. Lin, N. Parslow, L. Widhalm, P. Pakhlov, H. Miyata, N. C. Hastings, Y. Hoshi, J. Schümann, Matthew Jones, K. Hayasaka, H. Park, A. Bozek, M. H. Tanaka, C. H. Wang, U. Bitenc, T.H. Kim, A. Drutskoy, Y. J. Kim, Hiroaki Aihara, Tatiana Medvedeva, Phillip Urquijo, H. Ozaki, C. Z. Yuan, Rainer Stamen, D. Mohapatra, I. Tikhomirov, H. Ha, M. Iwasaki, N. Katayama, C. C. Zhang, B. G. Cheon, H. Shibuya, M. Watanabe, M. D. Peters, J. Haba, L.M. Zhang, Frederic Jean Ronga, Y. Yamashita, R. Pestotnik, K. Belous, S. Korpar, Jolanta Brodzicka, H. Yamamoto, T. Nagamine, Nobuaki Sato, Shimpei Yamamoto, Y. Chao, C. Jacoby, N. Kishimoto, H. R. Khan, S. K. Kim, A. Chen, Toru Iijima, Y. Unno, Kazuo Abe, Y. Asano, P. Kapusta, S. Okuno, A. Ogawa, Andrej Gorišek, A. Garmash, Hirokazu Ishino, A. Ishikawa, Y. Teramoto, Bruce Yabsley, A. Bay, S.L. Zang, T. Okabe, Yasushi Nagasaka, S. E. Lee, T. Nozaki, S. W. Lin, F. Takasaki, D. Liventsev, N.I. Root, G. S. Varner, W. T. Chen, P. Chang, J. Wicht, Jung-Hyun Kim, R. Itoh, Q. L. Xie, Tsukasa Aso, T. Nakagawa, T. Arakawa, H. Kakuno, Kai-Feng Chen, K. Senyo, K. Ueno, T. Kawasaki, D. Zurcher, J. H. Kang, A. Sugiyama, Jamal Rorie, X. C. Tian, D. Heffernan, C.-H. Wu, Y. Watanabe, H. Kichimi, T. Tsuboyama, T. Lesiak, J. Wiechczynski, G. Leder, F. Mandl, K. Tamai, and M. E. Sevior
Subjects: Physics, Particle decay, Crystallography, Annihilation, KEKB, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, General Physics and Astronomy, Resonance, Continuum (set theory), Lambda, Quantum number
Abstract: We report the results of several studies of the {lambda}{sub c}{sup +}{pi}{sup +}{pi}{sup -}X final state in continuum e{sup +}e{sup -} annihilation data collected by the Belle detector. An analysis of angular distributions in {lambda}{sub c}(2880){sup +}{yields}{sigma}{sub c}(2455){sup 0,++}{pi}{sup +,-} decays strongly favors a {lambda}{sub c}(2880){sup +} spin assignment of (5/2) over (3/2) or (1/2). We find evidence for {lambda}{sub c}(2880){sup +}{yields}{sigma}{sub c}(2520){sup 0,++}{pi}{sup +,-} decay and measure the ratio of {lambda}{sub c}(2880){sup +} partial widths {gamma}({sigma}{sub c}(2520){pi})/{gamma}({sigma}{sub c}(2455){pi})=0.225{+-}0.062{+-}0.= 025. This value favors the {lambda}{sub c}(2880){sup +} spin-parity assignment of (5/2){sup +} over (5/2){sup -}. We also report the first observation of {lambda}{sub c}(2940){sup +}{yields}{sigma}{sub c}(2455){sup 0,++}{pi}{sup +,-} decay and measure {lambda}{sub c}(2880){sup +} and {lambda}{sub c}(2940){sup +} mass and width parameters. These studies are based on a 553 fb{sup -1} data sample collected at or near the {upsilon}(4S) resonance at the KEKB collider.
Published: 2007

15. Measurement of D0-D0 mixing parameters in D0 --Ks pi+ pi- decays

Author: L M, Zhang, Z P, Zhang, I, Adachi, H, Aihara, V, Aulchenko, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, A, Bay, K, Belous, U, Bitenc, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, P, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, C-C, Chiang, I-S, Cho, Y, Choi, Y K, Choi, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, G, Gokhroo, B, Golob, H, Ha, J, Haba, T, Hara, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, W-S, Hou, Y B, Hsiung, H J, Hyun, T, Iijima, K, Ikado, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, Y, Iwasaki, N J, Joshi, D H, Kah, H, Kaji, S, Kajiwara, J H, Kang, H, Kawai, T, Kawasaki, H, Kichimi, H J, Kim, H O, Kim, S K, Kim, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lee, M J, Lee, S E, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, Y, Liu, D, Liventsev, T, Matsumoto, A, Matyja, S, McOnie, T, Medvedeva, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, Y, Nagasaka, I, Nakamura, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, Y, Onuki, W, Ostrowicz, H, Ozaki, P, Pakhlov, G, Pakhlova, C W, Park, H, Park, L S, Peak, R, Pestotnik, L E, Piilonen, A, Poluektov, H, Sahoo, Y, Sakai, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, S, Shinomiya, J-G, Shiu, B, Shwartz, J B, Singh, A, Sokolov, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, K, Sumisawa, T, Sumiyoshi, S, Suzuki, O, Tajima, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, T, Tsuboyama, S, Uehara, K, Ueno, T, Uglov, Y, Unno, S, Uno, P, Urquijo, Y, Usov, G, Varner, K, Vervink, S, Villa, A, Vinokurova, C H, Wang, M-Z, Wang, P, Wang, Y, Watanabe, E, Won, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, C Z, Yuan, C C, Zhang, V, Zhilich, and A, Zupanc
Abstract: We report a measurement of D0-D(0) mixing parameters in D(0) --K(s)(0) pi(+) pi(-) decays using a time-dependent Dalitz-plot analysis. We first assume CP conservation and subsequently allow for CP violation. The results are based on 540 fb(-1) of data accumulated with the Belle detector at the KEKB e(+)e(-) collider. Assuming negligible CP violation, we measure the mixing parameters x = (0.80 +/- 0.29(-0.07-0.14)(+0.09+0.10))% and y = (0.33+/-0.24(-0.12-0.08)(+0.08+0.06))%, where the errors are statistical, experimental systematic, and systematic due to the Dalitz decay model, respectively. Allowing for CP violation, we obtain the CP-violating parameters |q / p| = 0.86(-0.29-0.03)(+0.30+0.06) +/- 0.08 and arg(q/p) = (-14(-18-3-4)(+16+5+2)) degrees .
Published: 2007

16. Measurement ofCPAsymmetry in a Time-Dependent Dalitz Analysis ofB0→(ρπ)0and a Constraint on the Quark Mixing Matrix Angleϕ2

Author: A. Kusaka, C. C. Wang, H. Ishino, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, M. Fujikawa, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, H. Kakuno, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, K. Miyabayashi, H. Miyake, Y. Miyazaki, R. Mizuk, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, O. Schneider, J. Schümann, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc
Subjects: Physics, Particle physics, Particle decay, KEKB, Cabibbo–Kobayashi–Maskawa matrix, Electron–positron annihilation, Isospin, General Physics and Astronomy, Dalitz plot, Energy (signal processing), Standard Model
Abstract: We present a measurement of $CP$ asymmetry using a time-dependent Dalitz plot analysis of ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ decays based on a $414\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample containing $449\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs. The data was collected on the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. Combining our analysis with information on charged $B$ decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle ${\ensuremath{\phi}}_{2}$, $68\ifmmode^\circ\else\textdegree\fi{}l{\ensuremath{\phi}}_{2}l95\ifmmode^\circ\else\textdegree\fi{}$ as the 68.3% confidence interval for the ${\ensuremath{\phi}}_{2}$ solution consistent with the standard model (SM). A large SM-disfavored region also remains.
Published: 2007

17. Evidence forCPViolation inB0→D+D−Decays

Author: S. Fratina, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, A. Go, B. Golob, A. Gorišek, H. Ha, J. Haba, K. Hara, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc
Subjects: Particle physics, Particle decay, Pair production, KEKB, Branching fraction, media_common.quotation_subject, General Physics and Astronomy, CP violation, Value (computer science), Asymmetry, Standard Model, media_common
Abstract: We report measurements of the branching fraction and CP violation parameters in B(0)-->D+ D- decays. The results are based on a data sample that contains 535 x 10(6) BB pairs collected at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain [1.97+/-0.20(stat) +/- 0.20(syst)] x 10(-4) for the branching fraction of B0-->D+D-. The measured values of the CP violation parameters are S=-1.13+/-0.37+/-0.09, A=0.91+/-0.23+/-0.06, where the first error is statistical and the second is systematic. We find evidence of CP violation in B0-->D+D- at the 4.1sigma confidence level. While the value of S is consistent with expectations from other measurements, the value of the parameter A favors large direct CP violation at the 3.2sigma confidence level, in contradiction to standard model expectations.
Published: 2007

18. Evidence forD0−D¯0Mixing

Author: M. Starič, B. Golob, K. Abe, I. Adachi, H. Aihara, K. Arinstein, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, I.-S. Cho, S.-K. Choi, Y. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, A. Gorišek, H. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Higuchi, T. Hokuue, Y. Hoshi, W.-S. Hou, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, P. Kapusta, N. Katayama, T. Kawasaki, A. Kibayashi, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, H. Sahoo, Y. Sakai, N. Satoyama, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, B. Shwartz, A. Sokolov, A. Somov, S. Stanič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, A. Vinokurova, C. H. Wang, M.-Z. Wang, Y. Watanabe, J. Wicht, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Y. Yuan, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc
Subjects: General Physics and Astronomy
Published: 2007

19. Observation of DirectCPViolation inB0→π+π−Decays and Model-Independent Constraints on the Quark-Mixing Angleϕ2

Author: H. Ishino, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, M. Barbero, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, H. Ha, J. Haba, K. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, Y. Iwasaki, J. H. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, A. Kibayashi, H. Kichimi, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kusaka, A. Kuzmin, Y.-J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, J. MacNaughton, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, C.-H. Wu, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc
Subjects: Physics, Quark, Particle physics, media_common.quotation_subject, General Physics and Astronomy, Weinberg angle, Asymmetry, Standard Model, Nuclear physics, Pair production, KEKB, Isospin, CP violation, media_common
Abstract: We report a new measurement of the time-dependent CP-violating parameters in B0→π+π- decays with 535×106 BB pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider operating at the Υ(4S) resonance. We find 1464±65 B0→π+π- events and measure the CP-violating parameters Sππ=-0.61±0.10(stat)±0. 04(syst) and Aππ=+0.55±0.08(stat)±0.05(syst). We observe large direct CP violation with a significance greater than 5 standard deviations for any Sππ value. Using isospin relations, we measure the Cabibbo-Kobayashi-Maskawa quark-mixing matrix angle 2=(97±11)° for the solution consistent with the standard model and exclude the range 11°< 2
Published: 2007

20. Evidence for D0-D0 mixing

Author: M, Staric, B, Golob, K, Abe, I, Adachi, H, Aihara, K, Arinstein, T, Aushev, T, Aziz, S, Bahinipati, A M, Bakich, V, Balagura, E, Barberio, A, Bay, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, P, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, I-S, Cho, S-K, Choi, Y, Choi, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, A, Garmash, A, Gorisek, H, Ha, J, Haba, T, Hara, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Higuchi, T, Hokuue, Y, Hoshi, W-S, Hou, T, Iijima, K, Ikado, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kaji, P, Kapusta, N, Katayama, T, Kawasaki, A, Kibayashi, H, Kichimi, S K, Kim, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, M J, Lee, S E, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, D, Liventsev, F, Mandl, D, Marlow, T, Matsumoto, A, Matyja, S, McOnie, T, Medvedeva, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, D, Mohapatra, Y, Nagasaka, I, Nakamura, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Palka, R, Pestotnik, L E, Piilonen, A, Poluektov, M, Rozanska, H, Sahoo, Y, Sakai, N, Satoyama, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, C P, Shen, H, Shibuya, B, Shwartz, A, Sokolov, A, Somov, S, Stanic, H, Stoeck, K, Sumisawa, T, Sumiyoshi, S, Suzuki, S Y, Suzuki, O, Tajima, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, T, Uglov, Y, Unno, S, Uno, P, Urquijo, Y, Ushiroda, Y, Usov, G, Varner, K E, Varvell, K, Vervink, S, Villa, A, Vinokurova, C H, Wang, M-Z, Wang, Y, Watanabe, J, Wicht, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, H, Yamamoto, Y, Yamashita, M, Yamauchi, C Z, Yuan, Y, Yuan, C C, Zhang, L M, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc
Abstract: We observe evidence for D(0)-D(0) mixing by measuring the difference in the apparent lifetime when a D(0) meson decays to the CP eigenstates K(+)K(-) and pi(+)pi(-) and when it decays to the final state K(-)pi(+). We find the relative difference of the lifetimes y(CP) to be [1.31+/-0.32(stat)+/-0.25(syst)]%, 3.2 standard deviations from zero. We also search for a CP asymmetry between D(0) and D(0) decays; no evidence for CP violation is found. These results are based on 540 fb(-1) of data recorded by the Belle detector at the KEKB e(+)e(-) collider.
Published: 2007

21. Observation of the DecayB0→J/ψη

Author: M.-C. Chang, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, S. U. Kataoka, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, T. Nagamine, I. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, R. Seidl, K. Senyo, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, C. C. Zhang, L. M. Zhang, Z. P. Zhang, and A. Zupanc
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, General Physics and Astronomy, Resonance, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, law.invention, Particle decay, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider
Abstract: We report the first observation of B(0)-->J/psieta decay. These results are obtained from a data sample that contains 449 x10(6) BB[over] pairs accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a signal with a significance of 8.1 sigma and obtain a branching fraction of (9.5+/-1.7(stat)+/-0.8(syst)) x 10(-6).
Published: 2007

22. Search for Invisible Decay of theΥ(1S)

Author: A. Ishikawa, A. Zupanc, T. Nozaki, F. Takasaki, O. Nitoh, P. Križan, V.N. Zhilich, R. Seidl, Y. Sakai, Hiroaki Aihara, Young-Il Choi, E. Nakano, M. C. Chang, K. Miyabayashi, M. Shapkin, S. U. Kataoka, Robin Wedd, Rakesh Kumar, S. R. Hou, Y. J. Kim, Zhenyu Zhang, K. F. Chen, A. Yamaguchi, H. Ozaki, S. Nishida, Jasvinder A. Singh, S. W. Lin, S. Uehara, H. Ha, A. Drutskoy, N. Katayama, D. Anipko, I. Adachi, S. Villa, Y. Choi, H. Nakazawa, G. Gokhroo, T. Iijima, M. Dash, R. Pestotnik, Y. Yamashita, W. T. Chen, A. J. Schwartz, H. J. Kim, S. K. Kim, T. J. Gershon, U. Bitenc, A.S. Kuzmin, J. S. Lange, N. Tamura, H. Stoeck, Andrey Sokolov, Q. L. Xie, I. Bedny, K. Sumisawa, J. H. Kang, P. Pakhlov, E. Won, Kazuo Abe, T. Sumiyoshi, K. Trabelsi, Y. Ushiroda, S. Okuno, M. Starič, K. Ikado, N. Soni, L. E. Piilonen, M. Yamauchi, T. Schietinger, G. Pakhlova, J. Dalseno, H. Park, Masashi Hazumi, A. Bozek, X. C. Tian, Y. Teramoto, Bruce Yabsley, I. Tikhomirov, A. Chen, R. Chistov, J. Schümann, Antonio Limosani, J. S. H. Lee, W. S. Hou, H. R. Khan, T. E. Browder, H. Sahoo, H. Shibuya, Samo Stanič, D. Heffernan, T. Mori, B. Shwartz, T. Uglov, M. Danilov, Y. Onuki, C. C. Kuo, James Mueller, Y. Miyazaki, A. M. Bakich, Z. Natkaniec, T. Ohshima, Y. Iwasaki, V. M. Aulchenko, S. Eidelman, Y. J. Kwon, E. L. Barberio, C. H. Wang, T. Hokuue, N. Gabyshev, O. Schneider, Y. Watanabe, H. Kichimi, T. Tsuboyama, M. J. Lee, T. Lesiak, M. Bračko, M. Nakao, F. Mandl, K. Tamai, M. E. Sevior, S. Ogawa, S. McOnie, M. Z. Wang, K. Kinoshita, S. Fratina, G. N. Taylor, T. Matsumoto, N. Satoyama, H. Hayashii, A. Go, S. L. Olsen, K. Inami, S. Cole, P. Krokovny, M. Iwasaki, J. Haba, A. Bondar, K. Belous, S. Korpar, C. C. Wang, M. H. Tanaka, D. Liventsev, H. Miyata, Y. Hoshi, Phillip Urquijo, J. Wicht, K. Hayasaka, I. Bizjak, G. S. Varner, R. Itoh, Yu. V. Usov, I. Nakamura, K. Senyo, T. Kawasaki, R. Mizuk, H. Miyake, A. Somov, S. Noguchi, Hirokazu Ishino, H. Kawai, S. Uno, S. Suzuki, Gobinda Majumder, T. Tsukamoto, Byung Gu Cheon, and Osamu Tajima
Subjects: World Wide Web, Web of science, Computer science, General Physics and Astronomy
Abstract: Reference EPFL-ARTICLE-154572doi:10.1103/PhysRevLett.98.132001View record in Web of Science Record created on 2010-11-05, modified on 2017-05-12
Published: 2007

23. Measurement of Einstein-Podolsky-Rosen-type flavor entanglement in Upsilon(4S) --B0 B0 decays

Author: A, Go, A, Bay, K, Abe, H, Aihara, D, Anipko, V, Aulchenko, T, Aushev, A M, Bakich, E, Barberio, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bozek, M, Bracko, T E, Browder, P, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, S, Cole, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, T, Gershon, G, Gokhroo, B, Golob, A, Gorisek, H, Ha, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, Y, Iwasaki, C, Jacoby, J H, Kang, N, Katayama, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, S K, Kim, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, J, Lee, M J, Lee, T, Lesiak, A, Limosani, S-W, Lin, Y, Liu, D, Liventsev, T, Matsumoto, A, Matyja, S, McOnie, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, T, Mori, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, S L, Olsen, Y, Onuki, P, Pakhlov, G, Pakhlova, H, Palka, C W, Park, H, Park, L S, Peak, R, Pestotnik, M, Peters, L E, Piilonen, H, Sahoo, Y, Sakai, N, Satoyama, T, Schietinger, O, Schneider, J, Schümann, A J, Schwartz, R, Seidl, K, Senyo, M, Shapkin, H, Shibuya, B, Shwartz, J B, Singh, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, T, Sumiyoshi, F, Takasaki, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Unno, S, Uno, G, Varner, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, J, Wicht, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, Z P, Zhang, V, Zhilich, and A, Zupanc
Abstract: The neutral B meson pair produced at the Upsilon(4S) should exhibit a nonlocal correlation of the type discussed by Einstein, Podolsky, and Rosen. We measure this correlation using the time-dependent flavor asymmetry of semileptonic B(0) decays, which we compare with predictions from quantum mechanics and two local realistic models. The data are consistent with quantum mechanics, and inconsistent with the other models. Assuming that some B pairs disentangle to produce B(0) and B(0) with definite flavor, we find a decoherent fraction of 0.029 +/ -0.057, consistent with no decoherence.
Published: 2007

24. Measurement of the Near-Thresholde+e−→D()±D()∓Cross Section using Initial-State Radiation

Author: T. Tsukamoto, H. Stoeck, T. E. Browder, H. Nakazawa, G. Gokhroo, M. Danilov, C. C. Kuo, Byung Gu Cheon, K. Ueno, H. Miyake, E. Nakano, Y. Choi, P. Pakhlov, B. Golob, Y. Watanabe, A. Somov, A. Ishikawa, A. Bay, H. Kichimi, A. J. Schwartz, P. Krian, Y. Iwasaki, S. E. Lee, Y. Chao, A.S. Kuzmin, Y. J. Kwon, F. Takasaki, T. Tsuboyama, H. Park, A. Bozek, Kai-Feng Chen, H. R. Khan, Toru Iijima, T. Lesiak, Samo Stanič, O. Schneider, R. Mizuk, S. Nishida, Y. Sakai, B. Shwartz, D. Anipko, N. Soni, H. Miyata, I. Adachi, A. Yamaguchi, C. H. Wang, Y. Hoshi, V.N. Zhilich, K. Senyo, Y. Yamashita, Jasvinder A. Singh, S. W. Lin, X. C. Tian, K. Hayasaka, E. Won, A. Zupanc, M. Nakao, O. Nitoh, M. H. Tanaka, S. Villa, Anton Poluektov, T. Kawasaki, W. A. Mitaroff, M. Starič, Young-Il Choi, P. Krokovny, D. Heffernan, Y. Onuki, Hiroaki Aihara, Tatiana Medvedeva, Y. Miyazaki, Zhenyu Zhang, M. J. Lee, D. Liventsev, S. Blyth, S. K. Choi, V. M. Aulchenko, E. L. Barberio, Phillip Urquijo, S. Uno, T. Hokuue, S. Cole, S. McOnie, I. Bizjak, M. Bračko, H. Kaji, A. Drutskoy, G. S. Varner, A. Chen, N. Satoyama, S. Uehara, H. Ha, S. R. Hou, R. Itoh, W. T. Chen, F. Mandl, T. J. Gershon, N. Katayama, K. Tamai, Yu. V. Usov, J. H. Kang, I. Tikhomirov, S. Eidelman, K. S. Park, U. Bitenc, A. Imoto, M. E. Sevior, A. M. Bakich, M. Iwasaki, C. C. Zhang, H. Shibuya, Z. Natkaniec, T. Ohshima, Vladislav Balagura, Q. L. Xie, S. L. Olsen, H. Hayashii, J. Haba, J. Dalseno, A. Bondar, K. Belous, Kazuo Abe, P. Kapusta, S. Okuno, T. Aushev, Y. Teramoto, Bruce Yabsley, N. Gabyshev, J. Schümann, I. Bedny, K. Kinoshita, L. E. Piilonen, W. S. Hou, S. Y. Suzuki, M. Shapkin, G. Pakhlova, G. N. Taylor, R. Kulasiri, Y. J. Kim, H. Ozaki, A. Matyja, K. Ikado, S. Fratina, T. Matsumoto, R. Pestotnik, Masashi Hazumi, K. Inami, J. S. H. Lee, T. Uglov, S. Ogawa, R. Chistov, R. Seidl, M. C. Chang, Rakesh Kumar, and Gobinda Majumder
Subjects: Physics, Positron, Annihilation, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, General Physics and Astronomy, Electron, State (functional analysis), Atomic physics, Radiation, Energy (signal processing), Luminosity
Abstract: We report a measurement of the exclusive e{sup +}e{sup -}{yields}D{sup (*){+-}}D*{sup {+-}} cross section as a function of center-of-mass energy near the D{sup (*)}{+-}D*{sup {+-}} threshold with initial-state radiation. A partial reconstruction technique is used to increase the efficiency and to suppress background. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 547.8 fb{sup -1}.
Published: 2007

25. Observation of Time-DependentCPViolation inB0→η′K0Decays and Improved Measurements ofCPAsymmetries inB0→φK0,KS0KS0KS0andB0→J/ψK0Decays

Author: K.-F. Chen, K. Hara, M. Hazumi, T. Higuchi, K. Miyabayashi, Y. Nakahama, K. Sumisawa, O. Tajima, Y. Ushiroda, Y. Yusa, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, S. Banerjee, E. Barberio, M. Barbero, A. Bay, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, A. Garmash, T. Gershon, A. Go, G. Gokhroo, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kakuno, J. H. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kusaka, A. Kuzmin, Y.-J. Kwon, G. Leder, J. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, Y. Liu, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, A. Murakami, T. Nagamine, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc
Subjects: Physics, Particle physics, Particle decay, Pair production, KEKB, General Physics and Astronomy, CP violation
Abstract: We present improved measurements of $CP$-violation parameters in ${B}^{0}\ensuremath{\rightarrow}\ensuremath{\phi}{K}^{0}$, ${\ensuremath{\eta}}^{\ensuremath{'}}{K}^{0}$, ${K}_{S}^{0}{K}_{S}^{0}{K}_{S}^{0}$ decays based on a sample of $535\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB energy-asymmetric ${e}^{+}{e}^{\ensuremath{-}}$ collider. We obtain $\mathrm{sin} 2{\ensuremath{\phi}}_{1}^{\mathrm{eff}}=+0.64\ifmmode\pm\else\textpm\fi{}0.10(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.04(\mathrm{syst})$ for ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\eta}}^{\ensuremath{'}}{K}^{0}$, $+0.50\ifmmode\pm\else\textpm\fi{}0.21(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.06(\mathrm{syst})$ for ${B}^{0}\ensuremath{\rightarrow}\ensuremath{\phi}{K}^{0}$, and $+0.30\ifmmode\pm\else\textpm\fi{}0.32(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.08(\mathrm{syst})$ for ${B}^{0}\ensuremath{\rightarrow}{K}_{S}^{0}{K}_{S}^{0}{K}_{S}^{0}$ decays. We have observed $CP$ violation in the ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\eta}}^{\ensuremath{'}}{K}^{0}$ decay with a significance of 5.6 standard deviations. We also perform an improved measurement of $CP$ asymmetries in ${B}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{0}$ decays and obtain $\mathrm{sin} 2{\ensuremath{\phi}}_{1}=+0.642\ifmmode\pm\else\textpm\fi{}0.031(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.017(\mathrm{syst})$.
Published: 2007

26. Experimental constraints on the spin and parity of the Lambdac(2880)+

Author: R, Mizuk, K, Abe, I, Adachi, H, Aihara, D, Anipko, V, Aulchenko, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, A, Bay, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, M-C, Chang, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, S, Cole, J, Dalseno, M, Danilov, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, H, Ha, J, Haba, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kaji, J H, Kang, P, Kapusta, N, Katayama, H R, Khan, H, Kichimi, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, G, Leder, J, Lee, M J, Lee, S E, Lee, T, Lesiak, S-W, Lin, D, Liventsev, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, S, McOnie, H, Miyake, H, Miyata, Y, Miyazaki, M, Nakao, Z, Natkaniec, S, Nishida, S, Ogawa, T, Ohshima, S, Okuno, Y, Onuki, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Park, K S, Park, L S, Peak, R, Pestotnik, L E, Piilonen, Y, Sakai, N, Satoyama, O, Schneider, J, Schümann, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, J B, Singh, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, S Y, Suzuki, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, Y, Usov, G, Varner, S, Villa, C H, Wang, Y, Watanabe, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, C Z, Yuan, L M, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc
Abstract: We report the results of several studies of the Lambda(c)(+)pi(+)pi(-)X final state in continuum e(+)e(-) annihilation data collected by the Belle detector. An analysis of angular distributions in Lambda(c)(2880)(+)--Sigma(c)(2455)(0,++)pi(+,-) decays strongly favors a Lambda(c)(2880)(+) spin assignment of 5/2 over 3/2 or 1/2. We find evidence for Lambda(c)(2880)(+)--Sigma(c)(2520)(0,++)pi(+,-) decay and measure the ratio of Lambda(c)(2880)(+) partial widths Gamma(Sigma(c)(2520)pi)/Gamma(Sigma(c)(2455)pi)=0.225+/-0.062+/-0.025. This value favors the Lambda(c)(2880)(+) spin-parity assignment of 5/2(+) over 5/2(-). We also report the first observation of Lambda(c)(2940)(+)--Sigma(c)(2455)(0,++)pi(+,-) decay and measure Lambda(c)(2880)(+) and Lambda(c)(2940)(+) mass and width parameters. These studies are based on a 553 fb(-1) data sample collected at or near the Upsilon(4S) resonance at the KEKB collider.
Published: 2007

27. Measurement of the near-threshold e+e- --D()+/-D()-/+ cross section using initial-state radiation

Author: G, Pakhlova, K, Abe, I, Adachi, H, Aihara, D, Anipko, V, Aulchenko, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, A, Bay, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, T E, Browder, M-C, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, S, Cole, J, Dalseno, M, Danilov, A, Drutskoy, S, Eidelman, S, Fratina, N, Gabyshev, T, Gershon, G, Gokhroo, B, Golob, H, Ha, J, Haba, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kaji, J H, Kang, P, Kapusta, N, Katayama, T, Kawasaki, H R, Khan, H, Kichimi, Y J, Kim, K, Kinoshita, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J, Lee, M J, Lee, S E, Lee, T, Lesiak, S-W, Lin, D, Liventsev, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, S, McOnie, T, Medvedeva, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, P, Pakhlov, H, Park, K S, Park, R, Pestotnik, L E, Piilonen, A, Poluektov, Y, Sakai, N, Satoyama, O, Schneider, J, Schümann, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, J B, Singh, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, S Y, Suzuki, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, Y, Usov, G, Varner, S, Villa, C H, Wang, Y, Watanabe, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, C C, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc
Abstract: We report a measurement of the exclusive e+e- --D(*)+/-D*-/+ cross section as a function of center-of-mass energy near the D(*)+/-D*-/+ threshold with initial-state radiation. A partial reconstruction technique is used to increase the efficiency and to suppress background. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 547.8 fb(-1).
Published: 2007

28. Measurement of CP asymmetry in a time-dependent Dalitz analysis of B0--(rhopi)0 and a constraint on the quark mixing matrix angle phi2

Author: A, Kusaka, C C, Wang, H, Ishino, K, Abe, I, Adachi, H, Aihara, D, Anipko, V, Aulchenko, T, Aushev, A M, Bakich, E, Barberio, A, Bay, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, T E, Browder, M-C, Chang, P, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, S, Fratina, M, Fujikawa, N, Gabyshev, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, H, Ha, J, Haba, T, Hara, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kaji, H, Kakuno, J H, Kang, P, Kapusta, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J, Lee, M J, Lee, S E, Lee, T, Lesiak, A, Limosani, S-W, Lin, D, Liventsev, F, Mandl, D, Marlow, T, Matsumoto, K, Miyabayashi, H, Miyake, Y, Miyazaki, R, Mizuk, T, Mori, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, S, Noguchi, S, Ogawa, T, Ohshima, S, Okuno, Y, Onuki, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Park, K S, Park, L S, Peak, R, Pestotnik, L E, Piilonen, A, Poluektov, Y, Sakai, N, Satoyama, O, Schneider, J, Schümann, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, J B, Singh, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, S Y, Suzuki, O, Tajima, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, Y, Unno, S, Uno, P, Urquijo, Y, Ushiroda, Y, Usov, G, Varner, S, Villa, C H, Wang, M-Z, Wang, Y, Watanabe, R, Wedd, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, L M, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc
Abstract: We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B0--pi+pi-pi0 decays based on a 414 fb(-1) data sample containing 449 x 10(6) BB pairs. The data was collected on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+ e- collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle phi2, 68 degreesphi295 degrees as the 68.3% confidence interval for the phi2 solution consistent with the standard model (SM). A large SM-disfavored region also remains.
Published: 2007

29. Evidence of the Purely Leptonic DecayB−→τ−ν¯τ

Author: K. Ikado, K. Abe, I. Adachi, H. Aihara, K. Akai, M. Akemoto, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, Y. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, D. Epifanov, J. Flanagan, S. Fratina, K. Furukawa, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, H. Ha, J. Haba, K. Hara, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, N. Iida, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, T. Kamitani, J. H. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, E. Kikutani, H. J. Kim, H. O. Kim, K. Kinoshita, H. Koiso, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, J. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, S. Michizono, T. Mimashi, W. Mitaroff, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Nagamine, I. Nakamura, T. T. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, Y. Ogawa, K. Ohmi, T. Ohshima, N. Ohuchi, K. Oide, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, C. W. Park, H. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, Y. Sakai, T. Schietinger, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, T. Shidara, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, M. Tawada, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, M. Yoshida, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, and D. Zürcher
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, media_common.quotation_subject, Hadron, General Physics and Astronomy, Resonance, 01 natural sciences, Asymmetry, law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, B meson, 010306 general physics, Collider, media_common
Abstract: We present the first evidence of the decay B-→τ-ντ, using 414fb-1 of data collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We detect the signal with a significance of 3.5 standard deviations including systematics and measure the branching fraction to be B(B-→τ-ντ)=(1.79-0.49+0.56(stat) -0.51+0.46(syst))×10-4. This implies that fB=0.229-0.031+0.036(stat)-0. 037+0.034(syst)GeV and is the first direct measurement of this quantity. © 2006 The American Physical Society.
Published: 2006

30. Study of Decay Mechanisms inB−→Λc+p¯π−Decays and Observation of Low-Mass Structure in theΛc+p¯System

Author: N. Gabyshev, K. Abe, I. Adachi, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, A. M. Bakich, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, Y. Enari, S. Fratina, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, T. Hara, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Krokovny, S. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, T. Lesiak, S.-W. Lin, F. Mandl, T. Matsumoto, Y. Mikami, W. Mitaroff, H. Miyake, H. Miyata, R. Mizuk, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, H. Palka, C. W. Park, H. Park, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, M. Rozanska, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, A. J. Schwartz, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, V. Sidorov, J. B. Singh, A. Somov, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, M.-Z. Wang, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, Heyoung Yang, C. C. Zhang, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar
Subjects: Physics, Particle physics, Branching fraction, General Physics and Astronomy, Two-body problem, law.invention, Charmed baryons, Nuclear physics, Particle decay, KEKB, law, Collider, Low Mass, P system
Abstract: Using a sample of 152×106 BB pairs accumulated with the Belle detector at the KEKB e+e- collider, we study the decay mechanism of three-body charmed decay B-→Λc+pπ-. The intermediate two-body decay B-→Σc(2455)0p is observed for the first time with a branching fraction of (3.7±0.7±0.4±1.0)×10-5 and a statistical significance of 8.4σ. We also observe a low-mass enhancement in the (Λc+p) system, which can be parametrized as a Breit-Wigner function with a mass of (3.35-0.02+0.01±0.02)GeV/c2 and a width of (0.07-0.03+0.04±0.04)GeV/c2. We measure its branching fraction to be (3.9-0.7+0.8±0.4±1.0)×10-5 with a statistical significance of 6.2σ. The errors are statistical, systematic, and that of the Λc+→pK-π+ decay branching fraction. © 2006 The American Physical Society.
Published: 2006

31. Search for invisible decay of the Upsilon(1S)

Author: O, Tajima, H, Hayashii, M, Hazumi, K, Inami, Y, Iwasaki, S, Uehara, K, Abe, I, Adachi, H, Aihara, D, Anipko, V, Aulchenko, A M, Bakich, E, Barberio, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, M-C, Chang, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, S, Cole, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, S, Fratina, N, Gabyshev, T, Gershon, A, Go, G, Gokhroo, H, Ha, J, Haba, K, Hayasaka, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, J H, Kang, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, S K, Kim, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, J, Lee, M J, Lee, T, Lesiak, A, Limosani, S-W, Lin, D, Liventsev, G, Majumder, F, Mandl, T, Matsumoto, S, McOnie, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, T, Mori, J, Mueller, I, Nakamura, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Park, R, Pestotnik, L E, Piilonen, H, Sahoo, Y, Sakai, N, Satoyama, T, Schietinger, O, Schneider, J, Schümann, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, J B, Singh, A, Sokolov, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, K, Sumisawa, T, Sumiyoshi, S, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, T, Uglov, S, Uno, P, Urquijo, Y, Ushiroda, Y, Usov, G, Varner, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, R, Wedd, J, Wicht, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, Z P, Zhang, V, Zhilich, and A, Zupanc
Abstract: We report results of a search for the invisible decay of the Upsilon(1S) via the Upsilon(3S)--pi+ pi- Upsilon(1S) transition using a data sample of 2.9 fb-1 at the Upsilon(3S) resonance. The data were collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No signal is found, and an upper limit for the branching fraction at the 90% confidence level is determined to be B(Upsilon(1S)--invisible)2.5 x 10(-3).
Published: 2006

32. Observation ofB+→Λc+Λc−K+andB0→Λc+Λc−K0Decays

Author: N. Gabyshev, K. Abe, I. Adachi, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, W. Bartel, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, K. Ikado, A. Imoto, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, T. Kawasaki, H. R. Khan, H. Kichimi, S. M. Kim, S. Korpar, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, T. Lesiak, S.-W. Lin, D. Liventsev, G. Majumder, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, H. Palka, C. W. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, M. Yamauchi, J. Ying, and Z. P. Zhang
Subjects: Baryon, Physics, Particle physics, KEKB, Branching fraction, General Physics and Astronomy, Resonance, Lambda
Abstract: We report the first measurements of the doubly charmed baryonic $B$ decays $B\ensuremath{\rightarrow}{\ensuremath{\Lambda}}_{c}^{+}{\ensuremath{\Lambda}}_{c}^{\ensuremath{-}}K$. The ${B}^{+}\ensuremath{\rightarrow}{\ensuremath{\Lambda}}_{c}^{+}{\ensuremath{\Lambda}}_{c}^{\ensuremath{-}}{K}^{+}$ decay is observed with a branching fraction of $({6.5}_{\ensuremath{-}0.9}^{+1.0}\ifmmode\pm\else\textpm\fi{}1.1\ifmmode\pm\else\textpm\fi{}3.4)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ and a statistical significance of $15.4\ensuremath{\sigma}$. The ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\Lambda}}_{c}^{+}{\ensuremath{\Lambda}}_{c}^{\ensuremath{-}}{K}^{0}$ decay is observed with a branching fraction of $({7.9}_{\ensuremath{-}2.3}^{+2.9}\ifmmode\pm\else\textpm\fi{}1.2\ifmmode\pm\else\textpm\fi{}4.1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ and a statistical significance of $6.6\ensuremath{\sigma}$. The branching fraction errors are statistical, systematic, and the error resulting from the uncertainty of the ${\ensuremath{\Lambda}}_{c}^{+}\ensuremath{\rightarrow}p{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decay branching fraction. The analysis is based on $357\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data accumulated at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider.
Published: 2006

33. Study ofJ/ψ→pp¯,ΛΛ¯and Observation ofηc→ΛΛ¯at Belle

Author: S. Nishida, A. Ishikawa, A. Bay, I. Adachi, A. Chuvikov, F. Takasaki, P. Križan, T. E. Browder, O. Nitoh, M. Z. Wang, S. Eidelman, S. Ogawa, M. Shapkin, T. Iijima, Hiroaki Aihara, G. N. Taylor, S. U. Kataoka, G. Leder, Y. J. Kim, H. Ozaki, M. Danilov, M. Iwasaki, C. C. Kuo, A. Somov, R. Mizuk, Y. Iwasaki, Y. Choi, T. Sumiyoshi, Y. Yamashita, V.A. Sidorov, W. T. Chen, Y. J. Kwon, F. Mandl, P. Pakhlov, P. Krokovny, H. Kawai, H. Stoeck, Masashi Hazumi, W. A. Mitaroff, Zhenyu Zhang, Y. Onuki, A.S. Kuzmin, H. Miyake, S. Blyth, M. E. Sevior, O. Schneider, R. Seidl, Young-Il Choi, R. Pestotnik, J. S. H. Lee, H. Park, A. Bozek, K. Miyabayashi, D. Liventsev, N. Soni, C. C. Wang, J. Haba, Ho Kim, H. Hayashii, Y.-J. Lee, T. Uglov, Rakesh Kumar, Takehiko Mori, A. Go, Gobinda Majumder, Kazuo Abe, E. Nakano, K. S. Park, T. J. Gershon, I. Bizjak, H. Palka, A. Bondar, U. Bitenc, S. Okuno, L. E. Piilonen, T. Schietinger, G. S. Varner, X. C. Tian, T. Tsukamoto, Vladislav Balagura, S. L. Olsen, T. Aushev, S. Cole, R. Kulasiri, K. Belous, J. H. Kang, A. Matyja, Andrej Gorišek, G. Gokhroo, K. Inami, A. Yamaguchi, D. Heffernan, S. W. Lin, S. Uehara, E. Won, R. Itoh, A. J. Schwartz, H. J. Kim, H. Miyata, Y. Teramoto, Bruce Yabsley, H. Ha, N. Katayama, K. Ueno, S. Bahinipati, T. Okabe, Yu. V. Usov, C.-H. Wu, M. H. Tanaka, H. Shibuya, K. Hayasaka, J. Dalseno, Y. Miyazaki, Y. Watanabe, Byung Gu Cheon, H. Kichimi, T. Hokuue, A. Chen, T. Tsuboyama, A. Sokolov, T. Lesiak, Phillip Urquijo, Y. Chao, H. R. Khan, M. Starič, Y. B. Hsiung, C. H. Wang, T. Kawasaki, M. Nakao, M. Dash, S. McOnie, W. S. Hou, Samo Stanič, S. Uno, Long Zhang, T. Matsumoto, A. M. Bakich, Z. Natkaniec, T. Ohshima, N. Gabyshev, V. M. Aulchenko, Y. Sakai, and S. R. Hou
Subjects: Physics, Baryon, Particle physics, KEKB, Branching fraction, General Physics and Astronomy, Resonance, B meson
Abstract: We study the baryonic charmonium decays of B mesons B+-->etacK+ and B+-->J/psiK+, where the etac and J/psi subsequently decay into a pp[over] or LambdaLambda[over] pair. We measure the J/psi-->pp[over] and LambdaLambda[over] anisotropy parameters alphaB=-0.60+/-0.13+/-0.14 (pp[over]), -0.44+/-0.51+/-0.31 (LambdaLambda[over ]) and compare to results from e;{+}e;{-}-->J/psi formation experiments. We also report the first observation of etac-->LambdaLambda[over]. The measured branching fraction is B(etac-->LambdaLambda[over ])=(0.87(+0.24)/(-0.21)(stat)(+0.09/-0.14) (syst)+/-0.27(PDG))x10-3. This study is based on a 357 fb-1 data sample recorded on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.
Published: 2006

34. Observation of New States Decaying intoΛc+K−π+andΛc+KS0π−

Author: I. Adachi, M. H. Tanaka, S. Villa, Y. Yamashita, Y. Iwasaki, Y. J. Kwon, Masashi Hazumi, I. Bedny, T. E. Browder, A. Sokolov, T. Iijima, J. S. H. Lee, O. Schneider, T. Aushev, T. Nagamine, Zhenyu Zhang, M. Danilov, J. H. Kang, A. Chen, K. F. Chen, C. C. Kuo, A. Chuvikov, S. Cole, H. Ozaki, M. Nakao, O. Nitoh, V.A. Sidorov, Samo Stanič, W. A. Mitaroff, T. Kawasaki, S. Uehara, A. Drutskoy, A. Garmash, Y. B. Hsiung, H. Ha, S. McOnie, N. Katayama, Ho Kim, S. Nishida, I. Tikhomirov, R. Pestotnik, T. Uglov, R. Mizuk, M. Iwasaki, Hiroaki Aihara, Young-Il Choi, J. Dalseno, K. Miyabayashi, D. Anipko, H. Miyake, W. T. Chen, D. Liventsev, J. Dragic, T. J. Gershon, I. Bizjak, G. S. Varner, C. C. Wang, A. Imoto, A. M. Bakich, R. Itoh, P. Pakhlov, N. Tamura, H. Stoeck, C. H. Wang, Q. L. Xie, T. Ohshima, Y. Miyazaki, E. Nakano, S. Blyth, A. Bondar, K. Belous, S. Korpar, Jolanta Brodzicka, G. R. Moloney, P. Krokovny, N. Gabyshev, T. Sumiyoshi, H. Park, A. Bozek, Kazuo Abe, T. Hara, S. Okuno, M. Starič, A. Matyja, H. Miyata, W. S. Hou, Y. Hoshi, G. Leder, Y. Sakai, T. Hokuue, Andrej Gorišek, A. Yamaguchi, A. Ishikawa, A. Somov, H. Palka, T. Tsukamoto, A. Bay, K. Hayasaka, Jasvinder A. Singh, S. W. Lin, L. E. Piilonen, T. Schietinger, Long Zhang, G. Pakhlova, T. Nozaki, F. Takasaki, H. Shibuya, D. Epifanov, S. Eidelman, P. Križan, Y. Teramoto, G. Gokhroo, Bruce Yabsley, T. Okabe, A. J. Schwartz, H. J. Kim, Y. Choi, Y. Chao, M. Bračko, F. Mandl, H. Kawai, M. Dash, Y. Onuki, H. R. Khan, R. Chistov, A.S. Kuzmin, B. Golob, Byung Gu Cheon, R. Seidl, K. S. Park, M. Shapkin, S. R. Hou, T. Matsumoto, S. Ogawa, N. Soni, Rakesh Kumar, Vladislav Balagura, S. L. Olsen, M. E. Sevior, E. Won, Daniel Robert Marlow, U. Bitenc, S. Uno, Yu. V. Usov, M. C. Chang, M. Yamauchi, S. Suzuki, K. Ueno, C.-H. Wu, Y. Watanabe, H. Kichimi, T. Tsuboyama, T. Lesiak, X. C. Tian, H. Hayashii, J. Haba, D. Heffernan, M. Z. Wang, K. Kinoshita, G. N. Taylor, A. Go, K. Inami, V. M. Aulchenko, E. L. Barberio, and B. Shwartz
Subjects: Physics, Particle physics, Web of science, 010308 nuclear & particles physics, Electron–positron annihilation, media_common.quotation_subject, Hyperon, General Physics and Astronomy, 01 natural sciences, Asymmetry, Resonance (particle physics), Charmed baryons, Nuclear physics, Particle decay, Isospin, 0103 physical sciences, 010306 general physics, media_common
Abstract: Reference EPFL-ARTICLE-154577doi:10.1103/PhysRevLett.97.162001View record in Web of Science Record created on 2010-11-05, modified on 2017-05-12
Published: 2006

35. Observation of a Near-ThresholdD0D¯0π0Enhancement inB→D0D¯0π0KDecay

Author: G. Gokhroo, G. Majumder, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, S. Banerjee, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, S. Fratina, T. Gershon, A. Go, B. Golob, A. Gorišek, H. Ha, J. Haba, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, Y. J. Kim, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y.-J. Kwon, J. S. Lange, G. Leder, T. Lesiak, S.-W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, Y. Nagasaka, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. R. Sarangi, T. Schietinger, O. Schneider, R. Seidl, K. Senyo, M. Shapkin, H. Shibuya, V. Sidorov, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, A. Sugiyama, T. Sumiyoshi, F. Takasaki, M. Tanaka, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Usov, G. Varner, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, C.-H. Wu, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, and V. Zhilich
Subjects: Physics, Nuclear physics, Near threshold, Particle decay, Pair production, Web of science, Branching fraction, Electron–positron annihilation, media_common.quotation_subject, General Physics and Astronomy, B meson, Asymmetry, media_common
Abstract: Reference EPFL-ARTICLE-154578doi:10.1103/PhysRevLett.97.162002View record in Web of Science Record created on 2010-11-05, modified on 2017-12-10
Published: 2006

36. Observation of time-dependent CP violation in B0 --eta'K0 decays and improved measurements of CP asymmetries in B0 --phiK0, KS0KS0KS0 and B0 --J/psiK0 decays

Author: K-F, Chen, K, Hara, M, Hazumi, T, Higuchi, K, Miyabayashi, Y, Nakahama, K, Sumisawa, O, Tajima, Y, Ushiroda, Y, Yusa, K, Abe, I, Adachi, H, Aihara, D, Anipko, K, Arinstein, V, Aulchenko, T, Aushev, T, Aziz, A M, Bakich, V, Balagura, S, Banerjee, E, Barberio, M, Barbero, A, Bay, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, P, Chang, Y, Chao, A, Chen, W T, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, A, Garmash, T, Gershon, A, Go, G, Gokhroo, P, Goldenzweig, B, Golob, H, Ha, J, Haba, T, Hara, K, Hayasaka, H, Hayashii, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kakuno, J H, Kang, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, S K, Kim, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kusaka, A, Kuzmin, Y-J, Kwon, G, Leder, J, Lee, M J, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, Y, Liu, D, Liventsev, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, D, Mohapatra, G R, Moloney, A, Murakami, T, Nagamine, Y, Nagasaka, I, Nakamura, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, Y, Onuki, W, Ostrowicz, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Palka, H, Park, R, Pestotnik, L E, Piilonen, H, Sahoo, Y, Sakai, N, Satoyama, T, Schietinger, O, Schneider, J, Schümann, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, J B, Singh, A, Sokolov, A, Somov, S, Stanic, M, Staric, H, Stoeck, T, Sumiyoshi, S, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Unno, S, Uno, P, Urquijo, Y, Usov, G, Varner, K E, Varvell, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, R, Wedd, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, C C, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc
Abstract: We present improved measurements of CP-violation parameters in B(0) --phiK(0), eta(')K(0), KS(0)KS(0)KS(0) decays based on a sample of 535 x 10(6) BB pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We obtain sin2phi1(eff)=+0.64+/-0.10(stat)+/-0.04(syst) for B(0) --eta(')K(0), +0.50+/-0.21(stat)+/-0.06(syst) for B(0) --phiK(0), and +0.30+/-0.32(stat)+/-0.08(syst) for B(0) --KS(0)KS(0)KS(0) decays. We have observed CP violation in the B(0) --eta(')K(0) decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B(0) --J/psiK(0) decays and obtain sin2phi1=+0.642+/-0.031(stat)+/-0.017(syst).
Published: 2006

37. Measurement of the Quark Mixing Parametercos 2ϕ1Using Time-Dependent Dalitz Analysis ofB¯0→D[KS0π+π−]h0

Author: P. Krokovny, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, A. Gorišek, H. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Križan, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. Lee, T. Lesiak, J. Li, S.-W. Lin, G. Majumder, T. Matsumoto, S. McOnie, W. Mitaroff, K. Miyabayashi, Y. Miyazaki, T. Mori, I. Nakamura, M. Nakao, S. Nishida, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, H. Ozaki, P. Pakhlov, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, Y. Sakai, T. R. Sarangi, N. Sato, N. Satoyama, T. Schietinger, O. Schneider, K. Senyo, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, R. Stamen, M. Starič, H. Stoeck, K. Sumisawa, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, P. Urquijo, Y. Ushiroda, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, L. M. Zhang, Z. P. Zhang, and V. Zhilich
Subjects: Quark, Physics, Particle physics, 010308 nuclear & particles physics, Cabibbo–Kobayashi–Maskawa matrix, Electron–positron annihilation, General Physics and Astronomy, Dalitz plot, 01 natural sciences, Particle decay, Pair production, 0103 physical sciences, CP violation, 010306 general physics, Mixing (physics)
Abstract: Reference EPFL-ARTICLE-154424doi:10.1103/PhysRevLett.97.081801View record in Web of Science Record created on 2010-11-05, modified on 2017-05-12
Published: 2006

38. Measurement ofD0→πlν(Klν)Form Factors and Absolute Branching Fractions

Author: L. Widhalm, K. Abe, I. Adachi, H. Aihara, K. Arinstein, Y. Asano, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kakuno, J. H. Kang, P. Kapusta, S. U. Kataoka, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, H. O. Kim, K. Kinoshita, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y.-J. Kwon, J. S. Lange, G. Leder, J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, H. Miyata, Y. Miyazaki, D. Mohapatra, I. Nakamura, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, P. Pakhlov, C. W. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, A. Somov, R. Stamen, S. Stanič, M. Starič, H. Stoeck, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, L. M. Zhang, Z. P. Zhang, and D. Zürcher
Subjects: Physics, Particle decay, Particle physics, Crystallography, KEKB, Meson, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, Branching (polymer chemistry), Reconstruction method
Abstract: Using a 282 fb{sup -1} data sample collected by the Belle experiment at the KEKB e{sup +}e{sup -} collider, we study D{sup 0} decays to K{sup -}l{sup +}{nu} and {pi}{sup -}l{sup +}{nu} final states. The D{sup 0} flavor and momentum are tagged through a full reconstruction of the recoiling charm meson and additional mesons from fragmentation. The reconstruction method provides very good resolution in neutrino momentum and in q{sup 2}=(p{sub l}+p{sub {nu}}){sup 2}. Normalizing to the total number of D{sup 0} tags, we measure the absolute branching fractions to be B(D{sup 0}{yields}Kl{nu})=(3.45{+-}0.07{sub stat}{+-}0.20{sub syst})% and B(D{sup 0}{yields}{pi}l{nu})=(0.255{+-}0.019{sub stat}{+-}0.016{sub syst})% and the semileptonic form factors (within the modified pole model) f{sub +}{sup K}(0)=0.695{+-}0.007{sub stat}{+-}0.022{sub syst} and f{sub +}{sup {pi}}(0)=0.624{+-}0.020{sub stat}{+-}0.030{sub syst}.
Published: 2006

39. Evidence for Large DirectCPViolation inB±→ρ(770)0K±from Analysis of Three-Body CharmlessB±→K±π±π±Decays

Author: A. Garmash, K. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, M. Barbero, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, H. C. Ha, T. Hara, Y. Hasegawa, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, T. Nagamine, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, C. W. Park, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, M. Rozanska, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, R. Seidl, M. E. Sevior, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, M. Yamauchi, Heyoung Yang, L. M. Zhang, Z. P. Zhang, V. Zhilich, and D. Zürcher
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, General Physics and Astronomy, Resonance, Dalitz plot, 01 natural sciences, Particle decay, KEKB, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, CP violation, 010306 general physics
Abstract: We report results on a Dalitz analysis of three-body charmless B{sup {+-}}{yields}K{sup {+-}}{pi}{sup {+-}}{pi}{sup {+-}} decay including searches for direct CP violation. We report the first observation of the decay B{sup {+-}}{yields}f{sub 2}(1270)K{sup {+-}} with a statistical significance above 6{sigma}. We also observe first evidence for large direct CP violation in the B{sup {+-}}{yields}{rho}(770){sup 0}K{sup {+-}} channel. The results are obtained with a data sample that contains 386x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider.
Published: 2006

40. Measurement of Forward-Backward Asymmetry and Wilson Coefficients inB→K*l+l−

Author: Y. Chao, H. R. Khan, T. E. Browder, M. Yamauchi, C. C. Wang, Y. Iwasaki, Y. J. Kwon, Kazuo Abe, T. Hara, R. Mizuk, K. Senyo, Y. Asano, S. Okuno, M. Danilov, C. C. Kuo, L. Hinz, T. Kawasaki, Andrej Gorišek, Osamu Tajima, Y. Sakai, Jie Zhang, E. Nakano, S. Nishida, D. Anipko, D. Liventsev, I. Bizjak, G. S. Varner, O. Nitoh, M. Starič, O. Schneider, W. A. Mitaroff, S. U. Kataoka, Y. Ushiroda, Young-Il Choi, S. R. Hou, A. Yamaguchi, Seong Keun Kim, R. Itoh, Yu. V. Usov, Y. Teramoto, Bruce Yabsley, K. Miyabayashi, T. Okabe, A. M. Bakich, Z. Natkaniec, X. C. Tian, Noriaki K. Sato, M. Rozanska, Masashi Tanaka, Zhenyu Zhang, G. Gokhroo, A. J. Schwartz, S. W. Lin, U. Bitenc, Hiroaki Aihara, A. Drutskoy, N. Gabyshev, L. E. Piilonen, E. Won, K. Sumisawa, Rainer Stamen, Y. B. Hsiung, A. Chuvikov, T. J. Gershon, J. Haba, K. Ikado, T. Schietinger, H. Miyata, Y. Hoshi, S. Blyth, S. M. Kim, P. Chang, Masashi Hazumi, Hirokazu Ishino, A. Bozek, J. Ying, K. Hayasaka, Phillip Urquijo, H. Kawai, J. S. H. Lee, Y. Miyazaki, Y. Onuki, R. Kulasiri, Q. L. Xie, A. Somov, T. Hokuue, Samo Korpar, Marco Barbero, W. S. Hou, Y. Yusa, Samo Stanič, J. H. Kang, Long Zhang, A. Chen, M. Dash, M. Iwasaki, J. Dalseno, B. Golob, Y. Watanabe, H. Kichimi, M. Bračko, T. Lesiak, J. Li, A. Ishikawa, F. Mandl, K. Tamai, S. E. Lee, T. Nozaki, M. E. Sevior, F. Takasaki, C. W. Park, P. Križan, M. Shapkin, A. Bondar, H. Ozaki, R. Pestotnik, S. Eidelman, G. R. Moloney, Y. Choi, R. Seidl, N. Soni, Rakesh Kumar, Takayoshi Ohshima, A. Matyja, K. Inami, M. Z. Wang, K. Kinoshita, G. N. Taylor, N. Satoyama, H. Hayashii, M. Nakao, S. McOnie, S. Uno, C. Schwanda, Vladislav Balagura, S. Fratina, S. L. Olsen, T. Matsumoto, S. Suzuki, N. Tamura, H. Stoeck, S. Uehara, H. Ha, N. Katayama, K. Trabelsi, T. Aushev, Gobinda Majumder, Antonio Limosani, H. Miyake, T. Tsukamoto, H. Shibuya, Toru Iijima, Byung Gu Cheon, I. Adachi, S. Villa, C. H. Wang, Y. Yamashita, and T. Nagamine
Subjects: Physics, Particle physics, Muon, Electron–positron annihilation, media_common.quotation_subject, General Physics and Astronomy, Resonance, Asymmetry, Particle decay, KEKB, Pair production, High Energy Physics::Experiment, B meson, media_common
Abstract: We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients A{sub 9}/A{sub 7} and A{sub 10}/A{sub 7} in B{yields}K{sup *}l{sup +}l{sup -}, where l represents an electron or a muon. We find evidence for the forward-backward asymmetry with a significance of 3.4{sigma}. The results are obtained from a data sample containing 386x10{sup 6} BB pairs that were collected on the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider.
Published: 2006

41. Observation of a near-threshold D(0)D[over](0)pi(0) enhancement in B--D(0)D[over](0)pi(0)Kappa decay

Author: G, Gokhroo, G, Majumder, K, Abe, I, Adachi, H, Aihara, D, Anipko, T, Aushev, T, Aziz, A M, Bakich, V, Balagura, S, Banerjee, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, P, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, S, Eidelman, S, Fratina, T, Gershon, A, Go, B, Golob, A, Gorisek, H, Ha, J, Haba, K, Hayasaka, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, H, Kawai, T, Kawasaki, H, Kichimi, H O, Kim, Y J, Kim, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, Y-J, Kwon, J S, Lange, G, Leder, T, Lesiak, S-W, Lin, D, Liventsev, F, Mandl, T, Matsumoto, S, McOnie, W, Mitaroff, H, Miyata, Y, Miyazaki, R, Mizuk, G R, Moloney, T, Nagamine, Y, Nagasaka, M, Nakao, S, Nishida, O, Nitoh, S, Noguchi, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, P, Pakhlov, H, Palka, R, Pestotnik, L E, Piilonen, Y, Sakai, T R, Sarangi, T, Schietinger, O, Schneider, R, Seidl, K, Senyo, M, Shapkin, H, Shibuya, V, Sidorov, J B, Singh, A, Sokolov, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, A, Sugiyama, T, Sumiyoshi, F, Takasaki, M, Tanaka, Y, Teramoto, X C, Tian, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Usov, G, Varner, S, Villa, C H, Wang, M-Z, Wang, Y, Watanabe, E, Won, C-H, Wu, A, Yamaguchi, Y, Yamashita, M, Yamauchi, C C, Zhang, Z P, Zhang, and V, Zhilich
Abstract: We report the first observation of a near-threshold enhancement in the D(0)D[over](0)pi(0) system from B--D(0)D[over](0)pi(0)Kappa decays using a 414 fb(-1) data sample collected at the Upsilon(4S) resonance. The enhancement peaks at a mass M=3875.2+/-0.7(+0.3)/(-1.6) +/-0.8 MeV/c2 and the branching fraction for events in the peak is B(B--D(0)D[over](0)pi(0)Kappa)=(1.22+/-0.31(+0.23)/(-0.30))x10(-4). The data were collected with the Belle detector at the KEKB energy-asymmetric e+ e- collider.
Published: 2006

42. Observation of new states decaying into Lambda(c)(+)Kappa(-)pi(+) and Lambda(c)(+)Kappa(0)/(s)pi(-)

Author: R, Chistov, K, Abe, I, Adachi, H, Aihara, D, Anipko, V, Aulchenko, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, A, Bay, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, M-C, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, D, Epifanov, N, Gabyshev, A, Garmash, T, Gershon, A, Go, G, Gokhroo, B, Golob, A, Gorisek, H, Ha, J, Haba, T, Hara, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, H O, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, G, Leder, J, Lee, T, Lesiak, S-W, Lin, D, Liventsev, F, Mandl, D, Marlow, T, Matsumoto, A, Matyja, S, McOnie, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, G R, Moloney, T, Nagamine, E, Nakano, M, Nakao, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Palka, H, Park, K S, Park, R, Pestotnik, L E, Piilonen, Y, Sakai, T, Schietinger, O, Schneider, A J, Schwartz, R, Seidl, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, A, Sokolov, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, T, Sumiyoshi, S, Suzuki, F, Takasaki, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, Y, Usov, G, Varner, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, E, Won, C-H, Wu, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, L M, Zhang, and Z P, Zhang
Abstract: We report the first observation of two charmed strange baryons that decay into Lambda(c)(+)Kappa(-)pi(+). The broader of the two states is measured to have a mass of 2978.5+/-2.1+/-2.0 MeV/c2 and a width of 43.5+/-7.5+/-7.0 MeV/c2. The mass and width of the narrow state are measured to be 3076.7+/-0.9+/-0.5 MeV/c;{2} and 6.2+/-1.2+/-0.8 MeV/c2, respectively. We also perform a search for the isospin partner states that decay into Lambda(c)(+)Kappa(0)/(s)pi(-) and observe a significant signal at the mass of 3082.8+/-1.8+/-1.5 MeV/c2. The data used for this analysis were accumulated at or near the Upsilon(4S) resonance, using the Belle detector at the e+ e- asymmetric-energy collider KEKB. The integrated luminosity of the data sample used is 461.5 fb(-1).
Published: 2006

43. Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs ine+e−Annihilation at Belle

Author: O. Nitoh, P. Pakhlov, Kazuo Abe, K. Sumisawa, Y. Asano, P. Kapusta, W. Bartel, S. Okuno, Hiroaki Aihara, A. Ogawa, E. Nakano, M. Bračko, Andrej Gorišek, N. Satoyama, H. Shibuya, H. Hayashii, C. H. Wang, M. Nakao, M. Iwasaki, Masashi Hazumi, H. Park, A. Bozek, Rainer Stamen, M. Grosse Perdekamp, Y. Yamashita, A. Yamaguchi, S. W. Lin, Y. Teramoto, T. Aushev, Bruce Yabsley, J. S. H. Lee, I. Nakamura, T. Okabe, T. Uglov, S. Uehara, F. Mandl, S. Nishida, H. Ha, Antonio Limosani, N. Katayama, K. Tamai, Samo Stanič, M. E. Sevior, D. Anipko, G. N. Taylor, J. S. Lange, L. S. Peak, T. Iijima, A. M. Bakich, Z. Natkaniec, T. Ohshima, A. Go, I. Adachi, Seong Keun Kim, S. Ogawa, N. Gabyshev, Y. Sakai, H. Miyata, Y. Hoshi, K. Senyo, Vladislav Balagura, W. S. Hou, S. L. Olsen, K. Inami, S. Villa, Y. Watanabe, P. Chang, T. E. Browder, T. Kawasaki, H. Kichimi, K. Hasuko, Y. Yusa, J. Schümann, K. Hayasaka, Noriaki K. Sato, S. R. Hou, T. Tsukamoto, Long Zhang, A. Matyja, N. Parslow, M. Danilov, T. Lesiak, D. Liventsev, Q. L. Xie, A. Chuvikov, C. C. Kuo, U. Bitenc, H. Miyake, Phillip Urquijo, J. Ying, H. Palka, L. E. Piilonen, I. Bizjak, M. Dash, Byung Gu Cheon, D. Zürcher, T. Schietinger, R. Kulasiri, G. S. Varner, R. Mizuk, B. Golob, Y. Iwasaki, M. Yamauchi, Y. J. Kwon, R. Itoh, Yu. V. Usov, J. Dragic, H. Kawai, S. Uno, O. Schneider, H. R. Khan, E. L. Barberio, Zhenyu Zhang, Y. Miyazaki, C. C. Wang, X. C. Tian, E. Won, T. Hokuue, S. Eidelman, S. Fratina, T. Matsumoto, N. Soni, T. J. Gershon, Takehiko Mori, R. Seidl, A. Somov, Rakesh Kumar, Y. Choi, A.S. Kuzmin, S. Blyth, S. M. Kim, J. H. Kang, J. Dalseno, A. Ishikawa, A. Bay, F. Takasaki, C. W. Park, J. Li, M. Shapkin, H. Ozaki, V.N. Zhilich, R. Pestotnik, W. A. Mitaroff, Young-Il Choi, Masashi Tanaka, A. Chen, G. Gokhroo, and M. Starič
Subjects: Quark, Physics, Annihilation, 010308 nuclear & particles physics, Electron–positron annihilation, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, 01 natural sciences, Nuclear physics, Baryon, Pair production, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Spin-½
Abstract: The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e(+)e(-) annihilation at a center-of-mass energy of 10.52 GeV, which can be attributed to a transverse polarization of the primordial quarks. The measurement was performed using a sample of 79 x 10(6) hadronic events collected with the Belle detector.
Published: 2006

44. Study of J/psi--pp[over],LambdaLambda[over] and observation of eta(c)--LambdaLambda[over] at Belle

Author: C-H, Wu, M-Z, Wang, K, Abe, I, Adachi, H, Aihara, V, Aulchenko, T, Aushev, S, Bahinipati, A M, Bakich, V, Balagura, A, Bay, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, T E, Browder, Y, Chao, A, Chen, W T, Chen, B G, Cheon, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, S, Eidelman, N, Gabyshev, T, Gershon, A, Go, G, Gokhroo, A, Gorisek, H, Ha, J, Haba, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, H O, Kim, Y J, Kim, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, G, Leder, J, Lee, Y-J, Lee, T, Lesiak, S-W, Lin, D, Liventsev, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, S, McOnie, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, T, Mori, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, P, Pakhlov, H, Palka, H, Park, K S, Park, R, Pestotnik, L E, Piilonen, Y, Sakai, T, Schietinger, O, Schneider, A J, Schwartz, R, Seidl, M E, Sevior, M, Shapkin, H, Shibuya, V, Sidorov, A, Sokolov, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, T, Sumiyoshi, F, Takasaki, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, Y, Usov, G, Varner, C C, Wang, C H, Wang, Y, Watanabe, E, Won, B D, Yabsley, A, Yamaguchi, Y, Yamashita, L M, Zhang, and Z P, Zhang
Abstract: We study the baryonic charmonium decays of B mesons B+--etacK+ and B+--J/psiK+, where the etac and J/psi subsequently decay into a pp[over] or LambdaLambda[over] pair. We measure the J/psi--pp[over] and LambdaLambda[over] anisotropy parameters alphaB=-0.60+/-0.13+/-0.14 (pp[over]), -0.44+/-0.51+/-0.31 (LambdaLambda[over ]) and compare to results from e;{+}e;{-}--J/psi formation experiments. We also report the first observation of etac--LambdaLambda[over]. The measured branching fraction is B(etac--LambdaLambda[over ])=(0.87(+0.24)/(-0.21)(stat)(+0.09/-0.14) (syst)+/-0.27(PDG))x10-3. This study is based on a 357 fb-1 data sample recorded on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.
Published: 2006

45. Observation ofb→dγand Determination of|Vtd/Vts

Author: D. Mohapatra, M. Nakao, S. Nishida, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, M. Barbero, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, H. C. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, S. U. Kataoka, N. Katayama, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, H. O. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, J. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, E. Nakano, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, F. J. Ronga, M. Rozanska, Y. Sakai, T. R. Sarangi, N. Sato, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, R. Seidl, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, J. Wicht, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, and D. Zürcher
Subjects: Physics, Particle physics, Neutral current, Meson, 010308 nuclear & particles physics, Branching fraction, Hadron, General Physics and Astronomy, 01 natural sciences, KEKB, Isospin, 0103 physical sciences, CP violation, B meson, Atomic physics, 010306 general physics
Abstract: We report the observation of the flavor-changing neutral current process b→dγ using a sample of 386×106 B meson pairs accumulated by the Belle detector at the KEKB e+e- collider. We measure branching fractions for the exclusive modes B-→ρ-γ, B0→ρ0γ, and B0→ωγ. Assuming that these three modes are related by isospin, we find B(B→(ρ,ω)γ)=(1.32-0.31+0.34(stat)-0.09+0.10(syst)) ×10-6 with a significance of 5.1σ. This result is used to determine the ratio of Cabibbo-Kobayashi-Maskawa matrix elements |Vtd/Vts| to be 0.199-0.025+0.026(exp)-0.015+0.018(theor). © 2006 The American Physical Society.
Published: 2006

46. Measurement of the quark mixing parameter cos2phi1 using time-dependent Dalitz analysis of B0 --D[KS(0)pi + pi-]h0

Author: P, Krokovny, K, Abe, I, Adachi, H, Aihara, D, Anipko, K, Arinstein, Y, Asano, V, Aulchenko, T, Aushev, S, Bahinipati, A M, Bakich, V, Balagura, E, Barberio, A, Bay, U, Bitenc, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, Y, Chao, A, Chen, W T, Chen, Y, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, A, Garmash, T, Gershon, A, Go, A, Gorisek, H, Ha, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Higuchi, L, Hinz, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, H J, Kim, S M, Kim, K, Kinoshita, S, Korpar, P, Krizan, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J, Lee, T, Lesiak, J, Li, S-W, Lin, G, Majumder, T, Matsumoto, S, McOnie, W, Mitaroff, K, Miyabayashi, Y, Miyazaki, T, Mori, I, Nakamura, M, Nakao, S, Nishida, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, H, Ozaki, P, Pakhlov, C W, Park, H, Park, L S, Peak, R, Pestotnik, L E, Piilonen, A, Poluektov, M, Rozanska, Y, Sakai, T R, Sarangi, N, Sato, N, Satoyama, T, Schietinger, O, Schneider, K, Senyo, H, Shibuya, B, Shwartz, J B, Singh, A, Sokolov, A, Somov, N, Soni, R, Stamen, M, Staric, H, Stoeck, K, Sumisawa, O, Tajima, F, Takasaki, K, Tamai, M, Tanaka, Y, Teramoto, X C, Tian, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, S, Uno, P, Urquijo, Y, Ushiroda, G, Varner, K E, Varvell, S, Villa, C C, Wang, C H, Wang, Y, Watanabe, E, Won, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, L M, Zhang, Z P, Zhang, and V, Zhilich
Abstract: We present a measurement of the angle phi1 of the Cabibbo-Kobayashi-Maskawa unitarity triangle using a time-dependent Dalitz analysis of D--KS(0)pi + pi- decays produced in neutral B meson decay to a neutral D meson and a light meson (B0--D*h0). The method allows a direct extraction of 2phi1 and, therefore, helps to resolve the ambiguity between 2phi1 and pi-2phi1 in the measurement of sin2phi1. We obtain sin2phi1= 0.78 +/- 0.44 +/- 0.22 and cos2varphi1 = 1.87(-0.53-0.32)(+0.40 + 0.22). The sign of cos2phi1 is determined to be positive at 98.3% C.L.
Published: 2006

47. Measurement of D0--pilnu(Klnu) form factors and absolute branching fractions

Author: L, Widhalm, K, Abe, I, Adachi, H, Aihara, K, Arinstein, Y, Asano, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, M, Barbero, A, Bay, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, T E, Browder, P, Chang, A, Chen, W T, Chen, Y, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, N, Gabyshev, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, A, Gorisek, H, Ha, J, Haba, T, Hara, K, Hayasaka, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kakuno, J H, Kang, P, Kapusta, S U, Kataoka, H, Kawai, T, Kawasaki, H R, Khan, H J, Kim, H O, Kim, K, Kinoshita, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, Y-J, Kwon, J S, Lange, G, Leder, J, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, S, McOnie, W, Mitaroff, H, Miyata, Y, Miyazaki, D, Mohapatra, I, Nakamura, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, P, Pakhlov, C W, Park, L S, Peak, R, Pestotnik, L E, Piilonen, Y, Sakai, N, Sato, N, Satoyama, K, Sayeed, T, Schietinger, O, Schneider, C, Schwanda, A J, Schwartz, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, A, Somov, R, Stamen, S, Stanic, M, Staric, H, Stoeck, S Y, Suzuki, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Unno, S, Uno, P, Urquijo, Y, Usov, G, Varner, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, L M, Zhang, Z P, Zhang, and D, Zürcher
Abstract: Using a 282 fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider, we study D0 decays to K-l+nu and pi-l+nu final states. The D0 flavor and momentum are tagged through a full reconstruction of the recoiling charm meson and additional mesons from fragmentation. The reconstruction method provides very good resolution in neutrino momentum and in q2=(pl+pnu)2. Normalizing to the total number of D0 tags, we measure the absolute branching fractions to be B(D0--Klnu)=(3.45+/-0.07stat+/-0.20syst)% and B(D0--pilnu)=(0.255+/-0.019stat+/-0.016syst)% and the semileptonic form factors (within the modified pole model) f+K(0)=0.695+/-0.007stat+/-0.022syst and f+pi(0)=0.624+/-0.020stat+/-0.030syst.
Published: 2006

48. Evidence for B--eta'pi and improved measurements for B--eta'K

Author: J, Schümann, C H, Wang, K, Abe, I, Adachi, H, Aihara, D, Anipko, K, Arinstein, Y, Asano, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, M, Barbero, A, Bay, I, Bedny, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, T E, Browder, M-C, Chang, P, Chang, Y, Chao, A, Chen, W T, Chen, B G, Cheon, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, T, Gershon, A, Go, G, Gokhroo, B, Golob, A, Gorisek, H C, Ha, J, Haba, T, Hara, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, L, Hinz, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, P, Kapusta, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, S K, Kim, S M, Kim, K, Kinoshita, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, J, Lee, T, Lesiak, A, Limosani, D, Liventsev, J, MacNaughton, G, Majumder, F, Mandl, D, Marlow, T, Matsumoto, A, Matyja, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, G R, Moloney, T, Mori, T, Nagamine, I, Nakamura, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, N, Parslow, L S, Peak, R, Pestotnik, L E, Piilonen, M, Rozanska, Y, Sakai, T R, Sarangi, N, Sato, T, Schietinger, O, Schneider, C, Schwanda, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, V, Sidorov, A, Sokolov, A, Somov, N, Soni, R, Stamen, S, Stanic, M, Staric, K, Sumisawa, S, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, Y, Usov, G, Varner, K E, Varvell, S, Villa, C C, Wang, M-Z, Wang, Y, Watanabe, E, Won, Q L, Xie, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, Y, Yusa, C C, Zhang, L M, Zhang, Z P, Zhang, V, Zhilich, and D, Zürcher
Abstract: We report evidence for the exclusive two-body charmless hadronic B meson decay B--eta'pi, and improved measurements of B--eta'K. The results are obtained from a data sample of 386x10(6) BB pairs collected at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure B(B+--eta'pi+)=[1.76(-0.62)(+0.67)(stat)(-0.14)(+0.15)(syst)]x10(-6) and B(B0--eta'pi0)=[2.79(-0.96)(+1.02)(stat)(-0.34)(+0.25)(syst)]x10(-6). We also find the ratio of B(B+--eta'K+)/B(B0--eta'K0)=1.17+/-0.08(stat)+/-0.03(syst) and measure the direct CP asymmetries for the charged modes.
Published: 2006

49. Observation of b--dgamma and determination of /Vtd/Vts

Author: D, Mohapatra, M, Nakao, S, Nishida, K, Abe, I, Adachi, H, Aihara, D, Anipko, K, Arinstein, Y, Asano, V, Aulchenko, T, Aushev, S, Bahinipati, A M, Bakich, V, Balagura, M, Barbero, I, Bedny, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, T E, Browder, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, T, Gershon, G, Gokhroo, B, Golob, A, Gorisek, H C, Ha, J, Haba, T, Hara, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, L, Hinz, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Imoto, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, S U, Kataoka, N, Katayama, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, H O, Kim, S M, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, J, Lee, T, Lesiak, A, Limosani, S-W, Lin, D, Liventsev, G, Majumder, F, Mandl, D, Marlow, T, Matsumoto, A, Matyja, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, G R, Moloney, T, Mori, E, Nakano, O, Nitoh, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, N, Parslow, L S, Peak, R, Pestotnik, L E, Piilonen, A, Poluektov, F J, Ronga, M, Rozanska, Y, Sakai, T R, Sarangi, N, Sato, T, Schietinger, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, R, Seidl, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, V, Sidorov, A, Sokolov, A, Somov, N, Soni, R, Stamen, S, Stanic, M, Staric, T, Sumiyoshi, S, Suzuki, O, Tajima, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, K, Trabelsi, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Unno, S, Uno, P, Urquijo, Y, Usov, G, Varner, K E, Varvell, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, J, Wicht, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, Y, Yusa, L M, Zhang, Z P, Zhang, V, Zhilich, and D, Zürcher
Abstract: We report the observation of the flavor-changing neutral current process b--dgamma using a sample of 386 x 106 B meson pairs accumulated by the Belle detector at the KEKB e+e- collider. We measure branching fractions for the exclusive modes B---rho-gamma, B0rho0gamma, and B0omegagamma. Assuming that these three modes are related by isospin, we find B(B--(rho,gamma)gamma)=[Formula: See Text] with a significance of 5.1sigma. This result is used to determine the ratio of Cabibbo-Kobayashi-Maskawa matrix elements /Vtd/Vts/ to be [Formula: See Text].
Published: 2006

50. Observation of B+ --Lambda c+ Lambda c- K+ and B0 --Lambda c+ Lambda c- K0 decays

Author: N, Gabyshev, K, Abe, I, Adachi, H, Aihara, Y, Asano, V, Aulchenko, T, Aushev, S, Bahinipati, A M, Bakich, V, Balagura, E, Barberio, W, Bartel, A, Bay, I, Bedny, U, Bitenc, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, A, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, J, Haba, K, Hayasaka, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, K, Ikado, A, Imoto, K, Inami, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, T, Kawasaki, H R, Khan, H, Kichimi, S M, Kim, S, Korpar, P, Krokovny, R, Kulasiri, C C, Kuo, A, Kuzmin, Y-J, Kwon, G, Leder, T, Lesiak, S-W, Lin, D, Liventsev, G, Majumder, T, Matsumoto, W, Mitaroff, K, Miyabayashi, H, Miyata, Y, Miyazaki, R, Mizuk, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, H, Ozaki, H, Palka, C W, Park, K S, Park, R, Pestotnik, L E, Piilonen, Y, Sakai, N, Sato, N, Satoyama, T, Schietinger, O, Schneider, C, Schwanda, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, A, Somov, N, Soni, R, Stamen, S, Stanic, M, Staric, T, Sumiyoshi, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, G, Varner, K E, Varvell, S, Villa, C C, Wang, C H, Wang, Y, Watanabe, E, Won, Q L, Xie, A, Yamaguchi, M, Yamauchi, J, Ying, and Z P, Zhang
Abstract: We report the first measurements of the doubly charmed baryonic B decays B --Lambda c+ Lambda c- K. The B+ --Lambda c+ Lambda c- K+ decay is observed with a branching fraction of (6.5(-0.9)(+1.0)+/-1.1+/-3.4)x10(-4) and a statistical significance of 15.4sigma. The B0 --Lambda c+ Lambda c- K0 decay is observed with a branching fraction of (7.9(-2.3)(+2.9)+/-1.2+/-4.1)x10(-4) and a statistical significance of 6.6sigma. The branching fraction errors are statistical, systematic, and the error resulting from the uncertainty of the Lambda c+ --pK- pi+ decay branching fraction. The analysis is based on 357 fb(-1) of data accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.
Published: 2006

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