Author: "T Hokuue" - Searchworks@Jio Institute Digital Library Search Results

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364 results on '"T Hokuue"'

1. New search for τ→μγ and τ→eγ decays at Belle

Author: S. K. Kim, I. Bizjak, H. Miyake, F. Mandl, S. E. Lee, T. Gershon, S. L. Olsen, Z. P. Zhang, K. Hayasaka, O. Nitoh, K. Miyabayashi, J. Brodzicka, A. Chen, H. Hayashii, R. Chistov, T. Lesiak, R. Itoh, T. Matsumoto, C. C. Kuo, S. W. Lin, N. Gabyshev, H. Miyata, P. Krokovny, X. C. Tian, K. Abe, Y. Kozakai, A. Sokolov, Y. Yamashita, C. C. Wang, W. S. Hou, T. Sumiyoshi, A. Kuzmin, L. S. Peak, P. Pakhlov, H. Aihara, D. Liventsev, H. Stoeck, M. E. Sevior, A. Imoto, Y. Teramoto, H. Sahoo, Y. Iwasaki, S. Okuno, N. Soni, I. Tikhomirov, Y. Usov, K. Senyo, G. R. Moloney, A. Bay, T. Schietinger, A.J. Schwartz, J. Haba, J. B. Singh, B. G. Cheon, O. Schneider, Q. L. Xie, S. Hou, S. Stanič, Y. Miyazaki, H. Nakazawa, B. Golob, N. Satoyama, J. H. Kang, H. Ha, A. Ishikawa, K. Arinstein, D. Heffernan, M. Yamauchi, S. Villa, W. T. Chen, T. Hokuue, T. Mori, G. N. Taylor, Y. Chao, K. S. Park, S. Eidelman, M. Nakao, Y. Nagasaka, A. Poluektov, T. Tsukamoto, J. Dalseno, H. Ozaki, E. Barberio, T. Hara, K. Inami, Y. Watanabe, T. Kawasaki, H.K Park, A. Bozek, S. Nishida, K. Tamai, S. Fratina, N. Tamura, M. Hazumi, Z. Natkaniec, P. Križan, A. Go, V. Aulchenko, D. Anipko, K. Belous, A. Yamaguchi, Y. Onuki, S. Uno, Hiroyuki Kaji, M. Starič, T. Uglov, K. Ueno, Y. K. Choi, Y. Sakai, V. Zhulanov, M. Shapkin, R. Kulasiri, H. R. Khan, A. Zupanc, Y. J. Kim, U. Bitenc, L. E. Piilonen, P. Chang, I. Adachi, S. Ogawa, A. Bondar, Masayuki Tanaka, M. C. Chang, Y. Hoshi, A. Drutskoy, Y. J. Kwon, M. Iwasaki, B. D. Yabsley, Y. Choi, C. H. Wang, I. Bedny, S. Uehara, H. Kichimi, F. Takasaki, V. Zhilich, A. Vinokurova, M. Danilov, P. Urquijo, A. Somov, R. Seidl, T. Tsuboyama, D. Epifanov, M. Dash, R. Kumar, T. Iijima, A. M. Bakich, T. Ohshima, G. Varner, K. Ikado, H. Shibuya, B. Shwartz, Kazuhiko Hara, H. Kawai, Michael J. Lee, E. Won, R. Pestotnik, G. Pakhlova, and M. Bračko
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Electron–positron annihilation, Lepton number, Belle experiment, Lepton
Abstract: We report on a search for the lepton flavor violating τ−→μ−γ and τ−→e−γ decays based on 535 fb−1 of data accumulated at the Belle experiment. No signal is found and we set 90% confidence level upper limits on the branching ratios B(τ−→μ−γ)
Published: 2008

2. Cross-talk suppressed multi-anode MCP-PMT

Author: T. Murase, H. Nishizawa, T. Matsumura, K. Inami, T. Mori, T. Hokuue, M. Akatsu, K. Kurimoto, N. Kishimoto, Y. Suzuki, Yuji Enari, Takayoshi Ohshima, S. Hasegawa, A. Tomita, T. Ihara, and Y. Yurikusa
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Physics - Instrumentation and Detectors, Discriminator, Photon, business.industry, FOS: Physical sciences, Charge density, Instrumentation and Detectors (physics.ins-det), Magnetic field, Anode, Optics, Electrode, Quantum efficiency, business, Instrumentation
Abstract: We have developed a 4-channel multi-anode MCP-PMT, SL10, which exhibits a performance of sigma_TTS ~ 30 ps for single photons with G ~ 10^6 and QE=20% under a magnetic field of B, 14 pages, 14 figures
Published: 2008

3. Study of the decay mechanism for B+→pp¯K+ and B+→pp¯π+

Author: S. Okuno, T. Iijima, L. E. Piilonen, T. Aushev, V. M. Aulchenko, G. Pakhlova, E. L. Barberio, M. Z. Wang, K. Kinoshita, Y. Teramoto, G. N. Taylor, S. Nishida, I. Tikhomirov, A. Chen, Samo Stanič, Y. Iwasaki, M. Shapkin, Robin Wedd, Y. J. Kim, H. Ozaki, Y. J. Kwon, M. Yamauchi, A. M. Bakich, T. Ohshima, E. Nakano, O. Schneider, H. J. Hyun, A. Kuzmin, C. C. Chiang, P. Chang, K. Senyo, M. Nakao, K. Ueno, Joowon Lee, Y. Unno, Andrey Sokolov, T. Kawasaki, V.N. Zhilich, C. C. Zhang, A. Yamaguchi, N. Gabyshev, H. Hayashii, S. W. Lin, R. Pestotnik, S. McOnie, T. E. Browder, S. Ogawa, H. Shibuya, H. Miyake, W. A. Mitaroff, J. H. Kang, A. Somov, R. Seidl, Y. Miyazaki, K. F. Chen, Young-Il Choi, D. Liventsev, K. Miyabayashi, S. Uehara, M. Danilov, C. C. Kuo, S. Uno, Y. Chao, I. S. Cho, G. S. Varner, T. Hokuue, S. Eidelman, P. Pakhlov, R. Mizuk, H. Ha, A. Ishikawa, A. Bay, N. Katayama, R. Itoh, S. E. Lee, S. Fratina, F. Takasaki, M. Starič, Rakesh Kumar, P. Wang, C. W. Park, P. Križan, K. Inami, H. Park, A. Bozek, F. Mandl, I. Adachi, Y. Sakai, Z. P. Zhang, C. H. Wang, U. Bitenc, Y. Yamashita, K. Tamai, S. Villa, K. Ikado, Masashi Hazumi, T. Matsumoto, T. Sumiyoshi, M. Bračko, Yu-xi Liu, H. Sahoo, M. E. Sevior, T. Uglov, Kevin Varvell, Osamu Tajima, A. Matyja, A. Zupanc, O. Nitoh, H. Aihara, Y. Choi, T. Hara, M. Tanaka, X. C. Tian, B. G. Cheon, J. Haba, A. Bondar, K. Belous, S. Korpar, D. Heffernan, E. Won, J. G. Shiu, Phillip Urquijo, M. Dash, B. Golob, S. Cole, H. Kichimi, T. Tsuboyama, T. Lesiak, K. Vervink, H. Kawai, Y. Watanabe, A. Vinokurova, Motoki Iwasaki, P. Krokovny, Yasushi Nagasaka, K. S. Park, Vladislav Balagura, S. L. Olsen, H. Miyata, Y. Hoshi, Tatiana Medvedeva, J. Schümann, K. Hayasaka, J. T. Wei, D. H. Kah, Y. B. Hsiung, J. B. Singh, A. Drutskoy, and C. C. Wang
Subjects: Physics, Nuclear and High Energy Physics, Near threshold, KEKB, Electron–positron annihilation, Analytical chemistry, Pi, High Energy Physics::Experiment, Atomic physics, Helicity
Abstract: We study the characteristics of the low mass p (p) over bar enhancements near threshold in the three-body decays B+ -> p (p) over barK(+) and B+ -> p (p) over bar pi(+). We observe that the proton polar angle distributions in the p (p) over bar helicity frame in the two decays have the opposite polarity, and measure the forward-backward asymmetries as a function of the p mass for the p (p) over barK(+) mode. We also search for the intermediate two-body decays, B+ -> (p) over bar Delta(++) and B+ -> p (Delta) over bar (0), and set upper limits on their branching fractions. These results are obtained from a 414 fb(-1) data sample that contains 449 x 10(6) B (B) over bar events collected near the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. (c) 2007 Elsevier B.V. All rights reserved.
Published: 2008

4. A study of γγ→KS0KS0 production at energies from 2.4 to 4.0 GeV at Belle

Author: W.T. Chen, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, 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, P. Chang, Y. Chao, A. Chen, B.G. Cheon, R. Chistov, Y. Choi, Y.K. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, A. Go, H. Ha, M. Hazumi, D. Heffernan, T. Higuchi, T. Hokuue, Y. Hoshi, W.-S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, H. Kaji, J.H. Kang, P. Kapusta, N. Katayama, 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, A. Kuzmin, Y.-J. Kwon, S.E. Lee, T. Lesiak, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, H. Miyata, Y. Miyazaki, R. Mizuk, G.R. Moloney, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S.L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, C.W. Park, R. Pestotnik, L.E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, K. Senyo, M.E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J.B. Singh, A. Sokolov, 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, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, S. Villa, C.C. Wang, C.H. Wang, M.-Z. 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: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Angular range, Range (particle radiation), Meson, law.invention, Nuclear physics, KEKB, law, Center of mass, Collider, Positron annihilation
Abstract: KS 0 KS 0 production in two-photon collisions has been studied using a 397.6 fb-1 data sample collected with the Belle detector at the KEKB e+ e- collider. For the first time the cross sections are measured in the two-photon center-of-mass energy range between 2.4 GeV and 4.0 GeV and angular range | cos θ* | < 0.6. Combining the results with measurements of γ γ → K+ K- from Belle, we observe that the cross section ratio σ (KS 0 KS 0) / σ (K+ K-) decreases from ∼0.13 to ∼0.01 with increasing energy. Signals for the χc 0 and χc 2 charmonium states are also observed. © 2007 Elsevier B.V. All rights reserved.
Published: 2007

5. Measurements of branching fractions and q2 distributions for B→πℓν and B→ρℓν decays with B→D(∗)ℓν decay tagging

Author: T. Hokuue, K. Abe, I. Adachi, H. Aihara, 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, A. Gorišek, H. Ha, J. Haba, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, 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, Y. Kozakai, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C.C. Kuo, A. Kuzmin, Y.-J. Kwon, J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, D. Mohapatra, I. Nakamura, E. Nakano, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, Y. Onuki, P. Pakhlov, C.W. Park, H. 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, A. Sugiyama, S. Suzuki, S.Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G.N. Taylor, Y. Teramoto, X.C. Tian, T. Tsukamoto, K. Ueno, T. Uglov, 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, E. Won, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, L.M. Zhang, Z.P. Zhang, and D. Zürcher
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Cabibbo–Kobayashi–Maskawa matrix, Electron–positron annihilation, Analytical chemistry, Form factor (quantum field theory), Resonance, B meson, Lattice QCD, Branching (polymer chemistry)
Abstract: We report measurements of the charmless semileptonic decays B0 → π- / ρ- l+ ν and B+ → π0 / ρ0 l+ ν, based on a sample of 2.75 × 108B over(B, ) events collected at the Υ{hooked} (4 S) resonance with the Belle detector at the KEKB e+ e- asymmetric collider. In this analysis, the accompanying B meson is reconstructed in the semileptonic mode B → D(*) l ν, enabling detection of the signal modes with high purity. We measure the branching fractions B (B0 → π- l+ ν) = (1.38 ± 0.19 ± 0.14 ± 0.03) × 10-4, B (B0 → ρ- l+ ν) = (2.17 ± 0.54 ± 0.31 ± 0.08) × 10-4, B (B+ → π0 l+ ν) = (0.77 ± 0.14 ± 0.08 ± 0.00) × 10-4 and B (B+ → ρ0 l+ ν) = (1.33 ± 0.23 ± 0.17 ± 0.05) × 10-4, where the errors are statistical, experimental systematic, and systematic due to form factor uncertainties, respectively. For each mode we also present the partial branching fractions in three q2 intervals: q2 < 8, 8 ≤ q2 < 16, and q2 ≥ 16 GeV2 / c2. From our partial branching fractions for B → π l ν and recent results for the form factor from unquenched Lattice QCD calculations, we obtain values of the CKM matrix element | Vu b |. © 2007 Elsevier B.V. All rights reserved.
Published: 2007

6. Search for lepton flavor violating τ− decays into ℓ−η, ℓ−η′ and ℓ−π0

Author: Y. Miyazaki, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aziz, A.M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, M. Bračko, T.E. Browder, A. Chen, W.T. Chen, B.G. Cheon, Y. Choi, Y.K. Choi, J. Dalseno, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Go, A. Gorišek, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, Y.J. Kim, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C.C. Kuo, A. Kuzmin, Y.-J. Kwon, M.J. Lee, T. Lesiak, S.-W. Lin, F. Mandl, T. Matsumoto, H. Miyake, H. Miyata, T. Nagamine, Y. Nagasaka, M. Nakao, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, L.S. Peak, R. Pestotnik, L.E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A.J. Schwartz, K. Senyo, M.E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J.B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, 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, P. Urquijo, Y. Usov, G. Varner, S. Villa, A. Vinokurova, C.H. Wang, M. Watanabe, Y. Watanabe, E. Won, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z.P. Zhang, V. Zhilich, V. Zhulanov, and A. Zupanc
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Pi, High Energy Physics::Experiment, Pseudoscalar meson, Lepton
Abstract: We have searched for lepton-flavor-violating $\tau$ decays with a pseudoscalar meson ($\eta$, $\eta'$ {and} $\pi^0$) using a data sample of 401 fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. No evidence for these decays is found and we set the following upper limits on the branching fractions: ${\cal{B}}(\tau^-\to e^-\eta) < 9.2\times 10^{-8}$, ${\cal{B}}(\tau^-\to \mu^-\eta) < 6.5\times 10^{-8}$, ${\cal{B}}(\tau^-\to e^-\eta') < 1.6\times 10^{-7}$, ${\cal{B}}(\tau^-\to \mu^-\eta') < 1.3\times 10^{-7}$, ${\cal{B}}(\tau^-\to e^-\pi^0) < 8.0\times 10^{-8}$ and ${\cal{B}}(\tau^-\to \mu^-\pi^0) < 1.2\times 10^{-7}$ at the 90% confidence level. These results improve our previously published upper limits by factors from 2.3 to 6.3.
Published: 2007

7. A search for the rare leptonic decays B+→μ+νμ and B+→e+νe

Author: Andrey Sokolov, Y. Iwasaki, G. Leder, P. Krokovny, Y. J. Kwon, Y. Onuki, N. Tamura, J. H. Kang, O. Schneider, A. Zupanc, K. Tamai, K. Sumisawa, H. Stoeck, M. H. Tanaka, O. Nitoh, C. H. Wang, R. Seidl, Samo Stanič, K. Ikado, M. E. Sevior, S. U. Kataoka, S. Nishida, N. Soni, W. T. Chen, E. L. Barberio, D. Anipko, P. Chang, Phillip Urquijo, Hiroaki Aihara, Y. Yamashita, I. Bedny, I. Nakamura, H. Sahoo, J. Dalseno, M. C. Chang, Q. L. Xie, T. Uglov, Yoji Hasegawa, Y. Choi, E. Nakano, M. Starič, Zhenyu Zhang, T. Nagamine, Rakesh Kumar, Y. Sakai, A. Drutskoy, T. Mori, H. Miyake, H. R. Khan, A. Somov, N. Satoyama, A.S. Kuzmin, U. Bitenc, M. J. Lee, P. Pakhlov, Y. Watanabe, S. Uno, C. Schwanda, M. Bračko, H. Kichimi, S. K. Kim, T. Iijima, H. Miyata, H. Nakazawa, G. Gokhroo, S. R. Hou, S. Fratina, H. J. Kim, Kazuo Abe, T. Tsuboyama, S. Cole, Y. Hoshi, T. Lesiak, S. Okuno, A. Yamaguchi, Gobinda Majumder, E. Won, T. J. Gershon, S. Noguchi, Jasvinder A. Singh, S. W. Lin, H. Park, A. Bozek, T. Tsukamoto, A. M. Bakich, S. Ogawa, M. Z. Wang, K. Kinoshita, T. Sumiyoshi, T. Matsumoto, Z. Natkaniec, T. Ohshima, H. Shibuya, M. Iwasaki, V.N. Zhilich, Y. Miyazaki, K. Hayasaka, Y. Teramoto, Bruce Yabsley, J. Schümann, B. Shwartz, S. Eidelman, N. Gabyshev, T. Hokuue, M. Yamauchi, G. N. Taylor, J. S. Lange, L. E. Piilonen, T. Schietinger, Young-Il Choi, G. Pakhlova, X. C. Tian, T. E. Browder, A. Go, D. Heffernan, S. Uehara, J. Haba, C. C. Kuo, W. S. Hou, H. Ha, N. Katayama, H. Kawai, R. Chistov, A. Bondar, K. Inami, K. Belous, S. Korpar, Byung Gu Cheon, R. Mizuk, M. Nakao, I. Adachi, S. McOnie, M. Dash, C. C. Wang, S. Villa, K. Senyo, T. Kawasaki, D. Liventsev, I. Bizjak, G. S. Varner, R. Itoh, S. Suzuki, A. Ishikawa, T. Nozaki, F. Takasaki, P. Križan, Antonio Limosani, I. Tikhomirov, A. Chen, M. Shapkin, Robin Wedd, Y. J. Kim, H. Ozaki, and R. Pestotnik
Subjects: Charmed baryons, Physics, Nuclear and High Energy Physics, Particle physics, Web of science, Electron–positron annihilation
Abstract: Reference EPFL-ARTICLE-154485doi:10.1016/j.physletb.2007.01.068View record in Web of Science Record created on 2010-11-05, modified on 2017-05-12
Published: 2007

8. First observation of the decay τ−→ϕK−ντ

Author: V. Aulchenko, T. Lesiak, M. Starič, J. B. Singh, A. Drutskoy, Y. Iwasaki, I. Bizjak, V. Sidorov, T. Matsumoto, D. Liventsev, R. Seidl, R. Mizuk, P. Kapusta, T. Tsukamoto, A. Bozek, J. Haba, T. Iijima, Y. J. Kwon, S. Korpar, K. Abe, M. E. Sevior, Y. Miyazaki, O. Tajima, O. Schneider, H. Aihara, T. Aushev, I. Nakamura, A. M. Bakich, T. Ohshima, S. Fratina, T. E. Browder, Rakesh Kumar, H. Miyata, R. Itoh, H. Kawai, L. S. Peak, E. Nakano, M. Nakao, L. E. Piilonen, C.-H. Wu, Kazuhiko Hara, Bruce Yabsley, T. Schietinger, T. Hokuue, A. Bondar, Y. B. Hsiung, B. Shwartz, R. Kulasiri, H. Ozaki, Y. Nagasaka, S. Villa, Phillip Urquijo, S. Okuno, A. Chen, G. Varner, H. Stoeck, K. Senyo, S. Uno, Y. Usov, K. Ueno, I. Bedny, K. Arinstein, K. Hayasaka, A. Kuzmin, S. Y. Suzuki, H. Hayashii, Gobinda Majumder, S. Ogawa, A. Poluektov, G. Leder, X. C. Tian, H. R. Khan, D. Epifanov, D. Heffernan, H. Miyake, A. Somov, M. Danilov, S. McOnie, K. F. Chen, W. Mitaroff, O. Nitoh, A. Zupanc, P. Krokovny, Masayoshi Y. Tanaka, H. Ha, W. T. Chen, S. Stanič, T. Gershon, H. Shibuya, S. Bahinipati, M. Bračko, F. Mandl, N. Tamura, Toshisuke Kawasaki, V. Zhilich, H. Palka, A. Yamaguchi, Y. J. Kim, S. W. Lin, E. L. Barberio, S. Uehara, H. Park, H. Kichimi, A. Matyja, K. Inami, Ichiro Adachi, T. Uglov, Y. Choi, G. N. Taylor, M. Hazumi, R. Chistov, James Mueller, S. Nishida, N. Soni, Y. Teramoto, Y. Yamashita, E. Won, S. U. Kataoka, S. Eidelman, N. Gabyshev, D. Anipko, W. S. Hou, Long Zhang, Y. Onuki, M. Barbero, Young-Il Choi, G. Gokhroo, P. Križan, A. J. Schwartz, Y. Sakai, A. Ishikawa, Y. Hoshi, C. W. Park, S. Hou, J. H. Kang, and J. Dalseno
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, Hadron, Symbol (formal), Belle experiment, Lepton
Abstract: We present the first observation of τ lepton decays to hadronic final states with a ϕ -meson. This analysis is based on 401 fb −1 of data accumulated at the Belle experiment. The branching fraction obtained is B ( τ − → ϕ K − ν τ ) = ( 4.05 ± 0.25 ± 0.26 ) × 10 −5 .
Published: 2006

9. Search for lepton flavor violating τ− decays with a KS0 meson

Author: Y. Miyazaki, K. Abe, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, A.M. Bakich, M. Barbero, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T.E. Browder, A. Chen, W.T. Chen, R. Chistov, Y. Choi, Y.K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, S. Eidelman, D. Epifanov, N. Gabyshev, T. Gershon, A. Gorišek, H. Ha, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J.H. Kang, P. Kapusta, H. Kawai, H.R. Khan, H. Kichimi, H.O. Kim, S. Korpar, P. Krokovny, R. Kumar, C.C. Kuo, A. Kuzmin, Y.-J. Kwon, J. Lee, T. Lesiak, S.-W. Lin, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, Y. Onuki, H. Ozaki, H. Palka, H. Park, L.S. Peak, R. Pestotnik, L.E. Piilonen, A. Poluektov, Y. Sakai, T. Schietinger, O. Schneider, R. Seidl, K. Senyo, M.E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, J.B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, F. Takasaki, N. Tamura, M. Tanaka, G.N. Taylor, Y. Teramoto, X.C. Tian, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C.C. Wang, C.H. Wang, Y. Watanabe, E. Won, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L.M. Zhang, and V. Zhilich
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Meson, Electron–positron annihilation, Supersymmetry, Flavor, Lepton
Abstract: We have searched for the lepton flavor violating decays τ- → l- KS 0 (l = e or μ), using a data sample of 281 fb-1 collected with the Belle detector at the KEKB e+ e- asymmetric-energy collider. No evidence for a signal was found in either of the decay modes, and we set the following upper limits for the branching fractions: B (τ- → e- KS 0) < 5.6 × 10-8 and B (τ- → μ- KS 0) < 4.9 × 10-8 at the 90% confidence level. These results improve the previously published limits set by the CLEO Collaboration by factors of 16 and 19, respectively. © 2006 Elsevier B.V. All rights reserved.
Published: 2006

10. Measurement of branching fractions for B→χc1(2)K(K∗) at Belle

Author: N. Soni, K. Abe, I. Adachi, H. Aihara, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, A.M. Bakich, E. Barberio, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, M. Bračko, T.E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, B.G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, L.Y. Dong, S. Eidelman, Y. Enari, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, J.H. Kang, J.S. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H.R. Khan, H. Kichimi, H.J. Kim, S.M. Kim, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, C.C. Kuo, A. Kuzmin, Y.-J. Kwon, T. Lesiak, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, T. Nagamine, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, C.W. Park, R. Pestotnik, M. Peters, L.E. Piilonen, A. Poluektov, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, M.E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J.B. Singh, A. Somov, 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, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, P. Urquijo, G. Varner, S. Villa, C.C. Wang, C.H. Wang, Y. Watanabe, E. Won, Q.L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yuan, C.C. Zhang, L.M. Zhang, Z.P. Zhang, and V. Zhilich
Subjects: Physics, Nuclear and High Energy Physics, KEKB, law, Analytical chemistry, Collider, Branching (polymer chemistry), Helicity, law.invention
Abstract: We have measured the branching fractions for the exclusive decay modes B→χc1(2)K(K∗)B→χc1(2)K(K∗) using a 140 fb−1140 fb−1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e−e+e− collider. The measured branching fractions for B+→χc1K+B+→χc1K+, B0→χc1K0B0→χc1K0, B0→χc1K∗0B0→χc1K∗0 and B+→χc1K∗+B+→χc1K∗+ decay modes are (4.5±0.2±0.5)×10−4(4.5±0.2±0.5)×10−4, (3.5±0.3±0.5)×10−4(3.5±0.3±0.5)×10−4, (3.1±0.3±0.7)×10−4(3.1±0.3±0.7)×10−4 and (4.1±0.6±0.9)×10−4(4.1±0.6±0.9)×10−4, respectively, where the first error is statistical and the second error is systematic. We do not observe statistically significant signals for the B→χc2K(K∗)B→χc2K(K∗) decay modes and set upper limits at the 90% confidence level. We also study the helicity distribution for B→χc1K∗B→χc1K∗ decay mode and show that the longitudinal polarization component is dominant.
Published: 2006

11. Search for the Θ(1540)+ pentaquark using kaon secondary interactions at Belle

Author: R. Mizuk, M. Danilov, K. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aushev, S. Bahinipati, A.M. Bakich, V. Balagura, S. Banerjee, E. Barberio, M. Barbero, A. Bay, I. Bedny, 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, S.-K. Choi, Y. Choi, A. Chuvikov, J. Dalseno, M. Dash, L.Y. Dong, A. Drutskoy, S. Eidelman, Y. Enari, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, T. Hara, N.C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, A. Ishikawa, R. Itoh, Y. Iwasaki, J.H. Kang, J.S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H.R. Khan, H. Kichimi, H.J. Kim, J.H. Kim, S.K. Kim, S.M. Kim, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, C.C. Kuo, A. Kuzmin, Y.-J. Kwon, J.S. Lange, S.E. Lee, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, G.R. Moloney, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C.W. Park, N. Parslow, L.S. Peak, R. Pestotnik, L.E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, A.J. Schwartz, M.E. Sevior, H. Shibuya, V. Sidorov, J.B. Singh, A. Somov, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G.N. Taylor, Y. Teramoto, X.C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, G. Varner, K.E. Varvell, S. Villa, C.C. Wang, C.H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, Q.L. Xie, B.D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, S.L. Zang, J. Zhang, L.M. Zhang, Z.P. Zhang, V. Zhilich, and D. Zürcher
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, KEKB, law, Hyperon, Collider, Resonance (particle physics), Pentaquark, law.invention, Charge exchange
Abstract: Using kaon secondary interactions in the material of the Belle detector, we search for both inclusive and exclusive production of the Θ(1540) +. We set an upper limit of 2.5% at the 90% C.L. on the ratio of the Θ(1540)+ to Λ(1520) inclusive production cross sections. We also search for the Θ(1540)+ as an intermediate resonance in the charge exchange reaction K+n→pKS 0. We set an upper limit of ΓΘ+
Published: 2006

12. 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

13. Search for lepton and baryon number violating τ− decays into Λ¯π− and Λπ−

Author: Y. Miyazaki, K. Abe, I. Adachi, H. Aihara, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A.M. Bakich, V. Balagura, E. Barberio, I. Bedny, 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, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, L.Y. Dong, A. Drutskoy, S. Eidelman, Y. Enari, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, H.C. Ha, 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, Y. Iwasaki, J.H. Kang, J.S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H.R. Khan, H. Kichimi, H.J. Kim, J.H. Kim, S.K. Kim, S.M. Kim, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, C.C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, S.E. Lee, T. Lesiak, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, G.R. Moloney, 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, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C.W. Park, N. Parslow, R. Pestotnik, L.E. Piilonen, A. Poluektov, N. Root, M. Rozanska, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, M.E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, A. Somov, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S.Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G.N. Taylor, Y. Teramoto, X.C. Tian, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, G. Varner, S. Villa, C.C. Wang, C.H. Wang, Y. Watanabe, E. Won, Q.L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, J. Zhang, L.M. Zhang, Z.P. Zhang, V. Zhilich, and D. Zürcher
Subjects: Physics, Baryon, Nuclear physics, Nuclear and High Energy Physics, Particle physics, KEKB, Electron–positron annihilation, Baryon number, Lepton
Abstract: We have searched for τ lepton decays, τ-→Λπ- and τ-→Λπ-, that simultaneously violate the conservation of the lepton (L) and baryon (B) number using a data sample of 154 fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. No evidence for a signal was found in either of the decay modes and we set the following upper limits for the branching fractions: B(τ-→Λπ-)
Published: 2006

14. Search for lepton flavor violating decays τ−→ ℓ−π0,ℓ−η,ℓ−η′

Author: A.E. Bondar, H. Nakazawa, G. Gokhroo, M. Dash, B. Golob, Y. Iwasaki, Y. J. Kwon, D. Liventsev, O. Schneider, G. S. Varner, L. S. Peak, A. Ishikawa, H. Palka, L. E. Piilonen, T. Schietinger, S. E. Lee, R. Itoh, F. Fang, F. Takasaki, M. Starič, T. Sumiyoshi, Jeremy Dalseno, N. Parslow, Yuji Enari, Ilija Bizjak, Y. Chao, J. Ying, G. Leder, H. R. Khan, R. Chistov, N. Tamura, H. Shibuya, P. Schonmeier, M. H. Tanaka, Hiroyuki Sagawa, M. Watanabe, M. C. Chang, H. Hayashii, Hyunyong Kim, V.N. Zhilich, F. Mandl, S. M. Kim, C. W. Park, W. Ostrowicz, G. R. Moloney, K. Tamai, W. A. Mitaroff, U. Bitenc, Phillip Urquijo, Osamu Tajima, M. Bračko, K. Senyo, P. Krokovny, M. E. Sevior, J. B. Singh, A. Imoto, A. M. Bakich, T. Ohshima, J. H. Kang, Seema Bahinipati, Y. Choi, O. Nitoh, I. Bedny, J. Li, N. Gabyshev, N.I. Root, W. T. Chen, Z. Natkaniec, B. Shwartz, D. Epifanov, Shaji Kumar, K. Inami, N. Soni, W. S. Hou, Y. Mikami, Q. L. Xie, D. Zontar, Hiroaki Aihara, K. Sumisawa, T. J. Gershon, M. Iwasaki, Kazuo Abe, C. C. Kuo, B. G. Cheon, Y. Asano, P. Kapusta, S. Okuno, Hikaru Kawai, Rainer Stamen, Jie Zhang, S. Eidelman, J. S. Kang, V. M. Aulchenko, L. Hinz, P. Pakhlov, S. L. Olsen, X. C. Tian, Andrej Gorišek, Samo Stanič, E. Nakano, J. Haba, Heyoung Yang, L.M. Zhang, Yasushi Nagasaka, Y. Teramoto, Bruce Yabsley, M. Nakao, S. L. Blyth, S. Korpar, Jolanta Brodzicka, A. Bozek, T. Hokuue, T. Okabe, A. Kuzmin, S. R. Hou, A. Drutskoy, Y. Ushiroda, S. Uehara, S. Fratina, A. Yamaguchi, S. Nishida, S. Ogawa, N. Katayama, A. Chen, S. W. Lin, Z. P. Zhang, Masashi Hazumi, T. Uglov, H. Sakaue, T. Matsumoto, H. Ozaki, S. Villa, H. Kichimi, T. Lesiak, H. Miyake, A. Somov, R. Mizuk, C. C. Wang, K. Ueno, T. Kawasaki, T. A. Shibata, H. Miyata, Y. Hoshi, Y. Sakai, J. Schümann, K. Hayasaka, T. Iijima, C. H. Wang, Y. Yamashita, T. Nagamine, Nobuaki Sato, T. Tsukamoto, K. Hoshina, S. Uno, A. Chuvikov, and M. Yamauchi
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Pi, Flavor, Prime (order theory), Lepton
Published: 2005

15. Time-dependent CP violation effects in partially reconstructed B0→D∗∓π± decays

Author: H. Miyata, Y. Hoshi, C. C. Wang, N. C. Hastings, K. Hayasaka, N. Kent, S. Fratina, S. Suzuki, F.J. Ronga, Z. P. Zhang, M. C. Chang, E. Nakano, M. Dash, Y. Iwasaki, Y. J. Kwon, N. Tamura, T. Matsumoto, I. Adachi, Gobinda Majumder, A. Ishikawa, A. Bay, F. Takasaki, C. W. Park, I. Bedny, J. Li, T. Tsukamoto, O. Schneider, B. Golob, S. Villa, K. Inami, A. Imoto, Y. Chao, W. Ostrowicz, D. Žontar, A. Yamaguchi, A. M. Bakich, H. Miyake, T. Ohshima, S. W. Lin, D. Liventsev, Byung Gu Cheon, S. Cole, Simon Blyth, A. Somov, K. Trabelsi, H. R. Khan, Anton Poluektov, A. Bondar, T. Iijima, M. Nakao, S. M. Kim, Jolanta Brodzicka, S. Uehara, L. S. Peak, Heyoung Yang, I. Bizjak, W. A. Mitaroff, G. S. Varner, N. Gabyshev, P. Krokovny, H. Palka, J. MacNaughton, N. Katayama, H. Hayashii, S. Bahinipati, Daniel Robert Marlow, T. Hokuue, S. Uno, C. Schwanda, L. E. Piilonen, T. Schietinger, H. J. Kim, J. H. Kang, R. Itoh, Hiroyuki Sagawa, H. Kichimi, A. Garmash, A. Chen, Shaji Kumar, Tapas Sarangi, K. Kinoshita, Hitoshi Yamamoto, Kevin Varvell, Phillip Urquijo, A. Chuvikov, M. Starič, K. Miyabayashi, J. Dalseno, M. Yamauchi, Hirokazu Ishino, T. Aushev, T. Tsuboyama, T. Lesiak, Kazuo Abe, B. D. Yabsley, Y. Asano, P. Kapusta, J. Dragic, S. Okuno, H. Aihara, D. Mohapatra, H. Kawai, S. L. Olsen, W. S. Hou, C. H. Wang, Antonio Limosani, R. Pestotnik, G. R. Moloney, T. Sumiyoshi, Jia-ju Zhang, Noriaki K. Sato, Y. Yamashita, Y. Sakai, K. Senyo, T. Gershon, T. Kawasaki, G. Leder, Andrej Gorišek, S. Stanič, N. Parslow, Long Zhang, F. Mandl, S. R. Hou, T. Nagamine, U. Bitenc, T. Nozaki, Y. Teramoto, K. Tamai, M. E. Sevior, H. Nakazawa, G. Gokhroo, T. Okabe, H. Shibuya, M. Watanabe, M. Tanaka, A. J. Schwartz, M. Bračko, W. T. Chen, Y. Mikami, T. Shibata, P. Chang, X. C. Tian, Osamu Tajima, Q. L. Xie, J. Haba, O. Nitoh, A. Kuzmin, S. Ogawa, K. Sumisawa, Masashi Hazumi, Rainer Stamen, T. Uglov, L. Hinz, S. Nishida, T. E. Browder, M. Danilov, C. C. Kuo, K. Hara, S. Eidelman, P. Pakhlov, A. Bozek, J. B. Singh, S. K. Choi, J. Ying, Motoki Iwasaki, Y. Ushiroda, Y. Choi, J. S. Kang, and S. Banerjee
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Resonance, law.invention, Nuclear physics, Pion, KEKB, law, CP violation, High Energy Physics::Experiment, B meson, Nuclear Experiment, Collider
Abstract: We report measurements of time-dependent decay rates for B 0 → D ∗ ∓ π ± decays and extraction of CP violation parameters related to ϕ 3 . We use a partial reconstruction technique, whereby signal events are identified using information only from the primary pion and the charged pion from the decay of the D ∗ ∓ . The analysis uses 140 fb −1 of data accumulated at the ϒ ( 4 S ) resonance with the Belle detector at the KEKB asymmetric-energy e + e − collider. We measure the CP violation parameters S + = 0.035 ± 0.041 ( stat ) ± 0.018 ( syst ) and S − = 0.025 ± 0.041 ( stat ) ± 0.018 ( syst ) .
Published: 2005

16. Cross-talk of a multi-anode PMT and attainment of a σ∼10ps TOF counter

Author: H. Shimoi, S. Kawakami, M. Akatsu, Y. Miyabayashi, K. Inami, N. Sato, Kiyoshi Hayasaka, T. Hokuue, H. Tokuda, H. Yanase, T. Ohshima, Yuji Enari, and T. Fujimori
Subjects: Physics, Nuclear and High Energy Physics, Photon, Optics, business.industry, Dynode, Time resolution, Tube (fluid conveyance), business, Instrumentation, Cherenkov radiation, Anode, Linear array
Abstract: We extensively studied a cross-talk phenomenon that seriously deteriorates the high time-resolution of a multi-anode 16-channel linear array photo-multiplier tube (PMT); the dynode structures were modified to eliminate the cross-talk effect and to recover a time resolution of σ = 70 – 80 ps for single photons. The use of 16 anode signals of the modified PMT enabled us to attain σ = 12 ps for a small TOF counter of Cherenkov radiation.
Published: 2005

17. Measurement of γγ→pp¯ production at Belle

Author: S. Nishida, Simon Blyth, F. Mand, J. H. Kang, H. Palka, L. E. Piilonen, V.N. Zhilich, T. Schietinger, W. A. Mitaroff, R. Kulasiri, J. Dalseno, G. Leder, H. Nakazawa, G. Gokhroo, R. Chistov, H. J. Kim, P. Krokovny, M. Iwasaki, Kazuo Abe, B. D. Yabsley, W. S. Hou, Masashi Hazumi, A. Go, E. Nakano, M. Starič, A. Ishikawa, A. Bay, Y. Hoshi, V. M. Aulchenko, Q. L. Xie, T. Aushev, Long Zhang, J. Haba, Y. Asano, P. Kapusta, S. Okuno, Osamu Tajima, F. Takasaki, A. Yamaguchi, Timothy Gershon, Jasvinder A. Singh, S. W. Lin, T. Uglov, K. Tamai, A. Matyja, A. Bondar, M. E. Sevior, M. Dash, T. Sumiyoshi, K. Hayasaka, K. Senyo, Andrej Gorišek, W. Ostrowicz, M. Danilov, C. C. Kuo, T. Kawasaki, S. Stanič, S. Uno, O. Nitoh, K. Inami, H. Kawai, S. Fratina, Gobinda Majumder, Y. Teramoto, S. Y. Suzuki, T. Tsukamoto, D. Liventsev, Akira Sugiyama, Hiroyuki Sagawa, A. Somov, K. Ueno, N. Tamura, H. Park, A. Bozek, I. Bizjak, T. Matsumoto, Yasushi Nagasaka, G. S. Varner, Hiroaki Aihara, Anton Poluektov, R. Itoh, J. Ying, Yuji Enari, Noriaki K. Sato, Rainer Stamen, R. Mizuk, Byung Gu Cheon, H. Kichimi, H. Shibuya, S. Ogawa, W. T. Chen, M. Watanabe, U. Bitenc, M. C. Chang, Zhenyu Zhang, H. Hayashii, T. Lesiak, Y. Yamashita, P. Chang, Y. J. Kwon, D. Zürcher, J. MacNaughton, A. Drutskoy, B. Shwartz, O. Schneider, S. M. Kim, A. Chuvikov, X. C. Tian, G. N. Taylor, D. Žontar, C. C. Wang, M. Nakao, Heyoung Yang, T. Hokuue, C. H. Wang, H. R. Khan, L. S. Peak, M. Yamauchi, Y. Sakai, S. R. Hou, A. Chen, R. Pestotnik, I. Bedny, J. S. Kang, S. Eidelman, N. Soni, Takehiko Mori, G. R. Moloney, Y. Choi, A.S. Kuzmin, S. Cole, S. L. Olsen, I. Adachi, S. Villa, H. Miyake, Toru Iijima, S. Uehara, S. Bahinipati, Suneel Kumar, M. Bračko, A. Imoto, A. M. Bakich, Z. Natkaniec, T. Ohshima, and N. Gabyshev
Subjects: Physics, Nuclear and High Energy Physics, Angular range, 010308 nuclear & particles physics, Branching fraction, 01 natural sciences, law.invention, Nuclear physics, Angular distribution, KEKB, law, 0103 physical sciences, Center of mass, 010306 general physics, Collider, Positron annihilation
Abstract: A high precision study of the process γγ→pp has been performed using a data sample of 89 fb-1 collected with the Belle detector at the KEKB e+e- collider. The cross section of pp production has been measured at two-photon center-of-mass (c.m.) energies between 2.025 and 4.0 GeV and in the c.m. angular range of |cosθ*
Published: 2005

18. Measurement of |Vub| near the endpoint of the electron momentum spectrum from semileptonic B-meson decays

Author: A. Limosani, K. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aushev, S. Bahinipati, A.M. Bakich, E. Barberio, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, 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, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, T. Hara, N.C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J.H. Kang, J.S. Kang, 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, R. Kulasiri, S. Kumar, C.C. Kuo, Y.-J. Kwon, J.S. Lange, G. Leder, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, H. Palka, C.W. Park, H. Park, N. Parslow, R. Pestotnik, L.E. Piilonen, F.J. Ronga, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, C. Schwanda, R. Seuster, M.E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, A. Somov, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S.Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X.C. Tian, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, P. Urquijo, G. Varner, K.E. Varvell, S. Villa, C.C. Wang, C.H. Wang, M.-Z. Wang, Q.L. Xie, B.D. Yabsley, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, J. Ying, J. Zhang, L.M. Zhang, Z.P. Zhang, and D. Žontar
Subjects: Physics, Nuclear physics, Momentum, Nuclear and High Energy Physics, Particle physics, Cabibbo–Kobayashi–Maskawa matrix, Branching fraction, Electron–positron annihilation, B meson, Center of mass, Electron, Resonance (particle physics)
Abstract: Reference EPFL-ARTICLE-154483doi:10.1016/j.physletb.2005.06.011View record in Web of Science Record created on 2010-11-05, modified on 2017-05-12
Published: 2005

19. Branching fraction, polarization and CP-violating asymmetries in B0→D+D− decays

Author: H. Miyake, M. Hazumi, K. Abe, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, T. Aziz, S. Bahinipati, A.M. Bakich, V. Balagura, Y. Ban, S. Banerjee, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T.E. Browder, Y. Chao, A. Chen, K.-F. Chen, B.G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y.K. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, L.Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, K. Hara, T. Hara, N.C. Hastings, K. Hayasaka, H. Hayashii, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J.H. Kang, J.S. Kang, P. Kapusta, S.U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H.R. Khan, H. Kichimi, H.J. Kim, J.H. Kim, S.K. Kim, S.M. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, C.C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, S.E. Lee, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, 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, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, H. Park, N. Parslow, L.S. Peak, R. Pestotnik, L.E. Piilonen, M. Rozanska, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, P. Schönmeier, J. Schümann, C. Schwanda, A.J. Schwartz, K. Senyo, R. Seuster, M.E. Sevior, H. Shibuya, J.B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, 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, T. Uglov, S. Uno, Y. Ushiroda, G. Varner, K.E. Varvell, S. Villa, C.C. Wang, C.H. Wang, M.-Z. Wang, M. Watanabe, Y. Watanabe, A. Yamaguchi, H. Yamamoto, T. Yamanaka, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yusa, J. Zhang, L.M. Zhang, Z.P. Zhang, V. Zhilich, and D. Žontar
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, Electron–positron annihilation, Astrophysics::Cosmology and Extragalactic Astrophysics, Polarization (waves), Nuclear physics, KEKB, CP violation, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract: We present measurements of the branching fraction, the polarization parameters and CP-violating asymmetries in B0→D*+D *- decays using a 140 fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We obtain B(B0→D*+D*-)=[0. 81±0.08(stat)±0.11(syst)]×10-3, R⊥=0.19±0. 08(stat)±0.01(syst), R0=0.57±0.08(stat)±0.02(syst), S=-0.75±0.56(stat)±0.12(syst) and A=-0.26±0.26(stat) ±0.06(syst). Consistency with Standard Model expectations is also discussed.
Published: 2005

20. Study of the baryon–antibaryon low-mass enhancements in charmless three-body baryonic B decays

Author: M. H. Tanaka, Hiroyuki Sagawa, H. Nakazawa, G. Gokhroo, N. Soni, T. Aushev, Phillip Urquijo, H. J. Kim, L. Hinz, Timothy Gershon, Osamu Tajima, S. M. Kim, O. Nitoh, H. Kawai, S. Nishida, Hiroaki Aihara, H. Miyata, Rainer Stamen, S. L. Olsen, N. Katayama, V.A. Sidorov, V.N. Zhilich, Y. Hoshi, I. Bedny, J. Li, N. Tamura, Zhenyu Zhang, J. S. Kang, W. A. Mitaroff, Y. Sakai, B. Shwartz, Yasushi Nagasaka, Youngjoon Kwon, S. K. Choi, A. Imoto, A. M. Bakich, Z. Natkaniec, T. Ohshima, M. Iwasaki, A. Drutskoy, J. Schümann, K. Hayasaka, S. Cole, D. Žontar, L. S. Peak, J. H. Kang, N. Gabyshev, R. Mizuk, P. Krokovny, D. Liventsev, S. Eidelman, T. Sumiyoshi, M. Dash, J. Ying, H. Ozaki, N. Parslow, Kevin Varvell, H. Palka, Jolanta Brodzicka, J. Dalseno, Seong Keun Kim, L. E. Piilonen, T. Schietinger, V. M. Aulchenko, I. Bizjak, B. Golob, G. S. Varner, M. Starič, Y. B. Hsiung, A. Ishikawa, R. Pestotnik, A.S. Kuzmin, A. Matyja, E. Nakano, T. E. Browder, S. E. Lee, F. Takasaki, C. W. Park, P. Križan, R. Itoh, A. Yamaguchi, W. S. Hou, Y.-J. Lee, Jasvinder A. Singh, S. W. Lin, M. C. Chang, Y. Iwasaki, G. R. Moloney, A. Chen, Long Zhang, Suneel Kumar, F. Fang, M. Bračko, C. C. Wang, O. Schneider, A. Somov, S. Fratina, Kai-Feng Chen, A. Bozek, T. Matsumoto, H. Shibuya, K. Senyo, T. Kawasaki, K. Kinoshita, S. Stanič, M. Watanabe, A. Chuvikov, H. Kichimi, Y. Yamashita, M. Danilov, C. C. Kuo, T. Nagamine, J. MacNaughton, T. L. Kuo, S. Uno, T. Tsukamoto, Byung Gu Cheon, S. R. Hou, K. Inami, C. H. Wang, M. Yamauchi, H. Miyake, Toru Iijima, S. Villa, S. Uehara, X. C. Tian, S. Bahinipati, J. Haba, Y. Chao, H. R. Khan, M. Nakao, G. Leder, F. Mandl, K. Tamai, M. E. Sevior, N.I. Root, W. Ostrowicz, K. Ueno, W. T. Chen, T. Shibata, P. Chang, Yuji Enari, T. Lesiak, Q. L. Xie, Kazuo Abe, B. D. Yabsley, Y. Asano, Andrej Gorišek, Y. Teramoto, T. Okabe, Heyoung Yang, T. Hokuue, R. Chistov, Samo Korpar, Meng Wang, Noriaki K. Sato, U. Bitenc, S. Ogawa, K. Sumisawa, Masashi Hazumi, and T. Uglov
Subjects: Nuclear physics, Baryon, Physics, High Energy Physics - Experiment (hep-ex), Nuclear and High Energy Physics, Particle physics, Angular distribution, Web of science, Electron–positron annihilation, FOS: Physical sciences, Low Mass, High Energy Physics - Experiment
Abstract: The angular distributions of the baryon-antibaryon low-mass enhancements seen in the charmless three-body baryonic B decays B+ -> p pbar K+, B0 -> p pbar Ks, and B0 -> p Lambdabar pi- are reported. A quark fragmentation interpretation is supported, while the gluonic resonance picture is disfavored. Searches for the Theta+ and Theta++ pentaquarks in the relevant decay modes and possible glueball states G with 2.2 GeV/c2 < M-ppbar < 2.4 GeV/c2 in the ppbar systems give null results. We set upper limits on the products of branching fractions, B(B0 -> Theta+ p)\times B(Theta+ -> p Ks) < 2.3 \times 10^{-7}, B(B+ -> Theta++ pbar) \times B(Theta++ -> p K+) < 9.1 \times 10^{-8}, and B(B+ -> G K+) \times B(G -> p pbar) < 4.1 \times 10^{-7} at the 90% confidence level. The analysis is based on a 140 fb^{-1} data sample recorded on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider., 14 pages, 13 figure files, update of hep-ex/0409010 for journal submisssion
Published: 2005

21. Spectra of prompt electrons from decays of B+ and B0 mesons and ratio of inclusive semielectronic branching fractions

Author: N. Tamura, D. Žontar, F. Mandl, S. Uno, Y. Iwasaki, E. Nakano, Y. Sakai, Jie Zhang, Y. J. Kwon, T. E. Browder, C. Schwanda, M. E. Sevior, Patrick Koppenburg, S. M. Kim, O. Schneider, Osamu Tajima, W. Ostrowicz, G. R. Moloney, M. Z. Wang, K. Kinoshita, H. Kawai, O. Nitoh, T. Aushev, C. H. Wang, H. Palka, Masashi Hazumi, S. Suzuki, S. R. Hou, A. Ishikawa, Yasushi Nagasaka, L. E. Piilonen, T. Schietinger, A. Yamaguchi, Jasvinder A. Singh, S. W. Lin, Antonio Limosani, W. S. Hou, A. Bay, S. E. Lee, T. Nozaki, Hiroaki Aihara, X. C. Tian, J. S. Lange, K. S. Park, F. Takasaki, A. Chuvikov, C. W. Park, J. Haba, R. Mizuk, Long Zhang, U. Bitenc, Rainer Stamen, H. Kichimi, A. Go, Kazuo Abe, B. D. Yabsley, T. Hara, Y. Asano, P. Kapusta, S. Okuno, M. Nakao, Gobinda Majumder, M. Starič, Zhenyu Zhang, I. Adachi, M. Rozanska, T. Uglov, S. L. Olsen, Takuya Higuchi, T. Tsukamoto, D. Liventsev, C. C. Wang, J. H. Kang, S. K. Choi, A. Garmash, H. Shibuya, A. Bondar, A. Drutskoy, J. Dalseno, M. Watanabe, Y. Teramoto, K. Ueno, K. Inami, Semen Eidelman, M. Akatsu, T. Okabe, S. Korpar, Jolanta Brodzicka, V. Eiges, Y. Hoshi, Heyoung Yang, J. MacNaughton, A. Somov, G. S. Varner, T. J. Gershon, M. H. Tanaka, T. Hokuue, G. Gokhroo, Y. Yamashita, Hiroyuki Sagawa, W. T. Chen, R. Chistov, T. Sumiyoshi, D. Mohapatra, Y. Watanabe, Yuji Enari, N. Gabyshev, A. M. Bakich, R. Itoh, H. J. Kim, Tapas Sarangi, Jung-Hyun Kim, Kevin Varvell, N. Parslow, S. Ogawa, H. Miyata, Byung Gu Cheon, S. Cole, A. Matyja, Ilija Bizjak, H. Miyake, T. Lesiak, V.N. Zhilich, J. Ying, P. Krokovny, S. H. Lee, Kai-Feng Chen, Simon Blyth, S. Semenov, W. A. Mitaroff, H. Hayashii, S. Fratina, Young-Il Choi, K. Sumisawa, S. Y. Suzuki, T. Kawasaki, J. Schümann, K. Hayasaka, T. Nagamine, M. Dash, T. Matsumoto, S. Stanič, R. Pestotnik, Akira Sugiyama, B. Golob, Toru Iijima, Y. Choi, S. Uehara, N. Katayama, Y. Chao, Rolf Seuster, A. Chen, J. S. Kang, I. Bedny, J. Li, S. Banerjee, Y. Yusa, N. Soni, Y. Ban, M. Yamauchi, M. Danilov, C. C. Kuo, L. Hinz, S. Nishida, M. Bračko, H. Park, A. Imoto, Z. Natkaniec, A. Bozek, and T. Ohshima
Subjects: Semileptonic decay, Nuclear physics, Physics, Nuclear and High Energy Physics, KEKB, Meson, High Energy Physics::Phenomenology, High Energy Physics::Experiment, B meson, Electron, Rest frame, Branching (polymer chemistry), Spectral line
Abstract: We present spectra of prompt electrons from decays of neutral and charged B mesons. The results are based on 140 fb −1 of data collected by the Belle detector on the ϒ ( 4 S ) resonance at the KEKB e + e − asymmetric collider. We tag ϒ ( 4 S ) → B B ¯ events by reconstructing a B meson in one of several hadronic decay modes; the semileptonic decay of the other B meson is inferred from the presence of an identified electron. We obtain for charged and neutral B mesons the partial rates of semileptonic decay, to electrons with momentum greater than 0.6 GeV / c in the B rest frame, and their ratio b + / b 0 = 1.08 ± 0.05 ± 0.02 , where the first and second errors are statistical and systematic, respectively.
Published: 2005

22. Search for τ→eγ decay at Belle

Author: S. U. Kataoka, G. Gokhroo, Noriaki K. Sato, U. Bitenc, H. J. Kim, M. Iwasaki, T. Aushev, Heyoung Yang, T. Hokuue, S. Blyth, S. Ogawa, J. Haba, C. C. Wang, B. Shwartz, V.N. Zhilich, H. R. Khan, D. Epifanov, Osamu Tajima, A. Matyja, Y. Yamashita, S. Uno, A. Bondar, A. Ishikawa, Jolanta Brodzicka, Y. Choi, K. Inami, M. C. Chang, Y. Iwasaki, O. Nitoh, G. Leder, Y. J. Kwon, H. Miyata, W. A. Mitaroff, A. Chuvikov, S. L. Olsen, K. Sumisawa, W. S. Hou, S. E. Lee, F. Takasaki, C. W. Park, S. Y. Suzuki, T. Nagamine, M. H. Tanaka, Y. Hoshi, Y. Sakai, V.A. Sidorov, O. Schneider, A.S. Kuzmin, E. Nakano, N. Tamura, S. Fratina, Long Zhang, Hiroyuki Sagawa, T. Tsukamoto, Kazuo Abe, Young-Il Choi, Y. Asano, K. Miyabayashi, Hiroaki Aihara, J. Schümann, K. Hayasaka, Masashi Hazumi, S. Okuno, F. Mandl, K. Senyo, H. Kawai, Rainer Stamen, A. Imoto, M. Dash, T. Matsumoto, A. M. Bakich, D. Žontar, A. Yamaguchi, T. Kawasaki, S. Stanič, P. Krokovny, T. Uglov, Z. Natkaniec, T. Ohshima, N. Soni, S. W. Lin, Byung Gu Cheon, Yasushi Nagasaka, Y. Teramoto, T. Okabe, H. Shibuya, M. Watanabe, I. Bedny, J. Li, W. Ostrowicz, J. H. Kang, N.I. Root, I. Bizjak, A. Garmash, G. S. Varner, W. T. Chen, J. Dalseno, A. Somov, H. Hayashii, P. Chang, Jung-Hyun Kim, M. Starič, J. S. Kang, N. Gabyshev, You-Jin Yuan, S. M. Kim, M. Yamauchi, Yuji Enari, H. Kichimi, S. Eidelman, T. Tsuboyama, C. H. Wang, T. Lesiak, S. R. Hou, X. C. Tian, M. Nakao, S. H. Lee, M. Bračko, R. Pestotnik, A. Chen, Zhenyu Zhang, T. E. Browder, Timothy Gershon, C. C. Kuo, L. Hinz, S. Nishida, Seong Keun Kim, H. Palka, L. E. Piilonen, T. Schietinger, P. Pakhlov, A. Bozek, R. Chistov, T. Sumiyoshi, N. Parslow, S. Villa, S. Uehara, N. Katayama, S. Bahinipati, H. Miyake, and Toru Iijima
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, Electron–positron annihilation, High Energy Physics::Phenomenology, Decays of taus, Taus, Lepton number, law.invention, Nuclear physics, KEKB, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider
Abstract: We have searched for the lepton-flavor-violating decay τ → e γ using a data sample of 86.7 fb−1 collected with the Belle detector at the KEKB asymmetric e + e − collider. No evidence for a signal is obtained, and we set an upper limit for the branching fraction B ( τ → e γ ) 3.9 × 10 −7 at the 90% C.L.
Published: 2005

23. Observation of B+→K+ηγ

Author: O. Nitoh, Kazuo Abe, T. Hara, G. Leder, Hiroaki Aihara, Y. Asano, P. Kapusta, S. Okuno, F. Mandl, A. Ishikawa, Takuya Higuchi, Rainer Stamen, Jie Zhang, M. H. Tanaka, S. E. Lee, Y. Choi, A. Somov, Y. Teramoto, S. R. Hou, F. Takasaki, C. W. Park, Hiroyuki Sagawa, M. E. Sevior, P. Križan, Timothy Gershon, R. Mizuk, W. Ostrowicz, R. Pestotnik, T. Okabe, E. Nakano, M. Dash, A. Chuvikov, S. Uno, M. Starič, B. Golob, M. Yamauchi, H. Miyata, Y. Hoshi, K. Inami, Zhenyu Zhang, Y. Sakai, W. S. Hou, J. Schümann, K. Hayasaka, T. Kawasaki, H. Park, Yuji Enari, H. Kichimi, S. Stanič, S. K. Choi, A. Drutskoy, D. Zürcher, Long Zhang, A. Bozek, T. Tsuboyama, V. M. Aulchenko, S. M. Kim, T. Lesiak, L. Y. Dong, S. Suzuki, M. Iwasaki, T. E. Browder, M. Danilov, C. C. Kuo, J. Ying, L. Hinz, S. Nishida, W. T. Chen, X. C. Tian, J. Haba, A. Bondar, S. Korpar, M. Nakao, Jolanta Brodzicka, Takehiko Mori, Y. Chao, Y. Ban, D. Liventsev, M. Z. Wang, P. Krokovny, I. Bizjak, C. H. Wang, J. S. Lange, G. S. Varner, H. Nakazawa, D. Epifanov, G. Gokhroo, A. Imoto, A. M. Bakich, R. Itoh, F. Fang, K. S. Park, Z. Natkaniec, T. Ohshima, P. Schonmeier, S. L. Olsen, H. Hayashii, Tapas Sarangi, C. C. Wang, A. J. Schwartz, H. J. Kim, C. C. Zhang, Kevin Varvell, H. Shibuya, M. Watanabe, V. Eiges, N. Gabyshev, Y. Yamashita, M. Akatsu, A. Chen, T. Nagamine, H. Palka, L. E. Piilonen, A. Matyja, T. Schietinger, I. Bedny, J. Li, J. S. Kang, M. Bračko, H. Ozaki, S. H. Lee, A. Yamaguchi, S. Banerjee, Y. Yusa, S. Eidelman, Jasvinder A. Singh, S. W. Lin, S. Fratina, H. Kawai, Yasushi Nagasaka, R. Chistov, T. Matsumoto, S. Blyth, Y. Ushiroda, T. Sumiyoshi, N. Parslow, V.N. Zhilich, W. A. Mitaroff, J. MacNaughton, Young-Il Choi, K. Miyabayashi, T. Aushev, S. Ogawa, N. Tamura, J. Dragic, D. Žontar, Masashi Hazumi, T. Uglov, Gobinda Majumder, T. Tsukamoto, Heyoung Yang, Byung Gu Cheon, S. Cole, T. Hokuue, H. Miyake, S. U. Kataoka, Y. J. Kwon, O. Schneider, J. H. Kang, A. Garmash, G. R. Moloney, J. Dalseno, Patrick Koppenburg, Toru Iijima, L. S. Peak, Noriaki K. Sato, K. F. Chen, U. Bitenc, S. Uehara, N. Katayama, S. Bahinipati, Rolf Seuster, D. Mohapatra, K. Sumisawa, S. Y. Suzuki, and Osamu Tajima
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, KEKB, Branching fraction, Electron–positron annihilation, Radiative B decay, Radiative transfer, Resonance, Storage ring
Abstract: We report measurements of radiative B decays with K η γ final states, using a data sample of 253 fb −1 recorded at the ϒ ( 4 S ) resonance with the Belle detector at the KEKB e + e − storage ring. We observe B + → K + η γ for the first time with a branching fraction of ( 8.4 ± 1.5 (stat) −0.9 +1.2 (syst) ) × 10 −6 for M K η 2.4 GeV / c 2 , and find evidence of B 0 → K 0 η γ . We also search for B → K 3 ∗ ( 1780 ) γ .
Published: 2005

24. Observation of the decays B0→K+π−π0 and B0→ρ−K+

Author: P. Chang, K. Abe, T. Abe, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, T. Aziz, S. Bahinipati, A.M. Bakich, Y. Ban, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T.E. Browder, M.-C. Chang, Y. Chao, B.G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, S. Cole, M. Danilov, M. Dash, L.Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, R. Guo, N.C. Hastings, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, Y.B. Hsiung, H.-C. Huang, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, 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, J.H. Kim, S.K. Kim, T.H. Kim, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y.-J. Kwon, S.E. Lee, T. Lesiak, J. Li, S.-W. Lin, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Okabe, S. Okuno, S.L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Park, N. Parslow, L.S. Peak, L.E. Piilonen, A. Poluektov, N. Root, M. Rozanska, H. Sagawa, Y. Sakai, O. Schneider, J. Schümann, S. Semenov, K. Senyo, M.E. Sevior, H. Shibuya, V. Sidorov, A. Somov, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, G. Varner, K.E. Varvell, S. Villa, C.C. Wang, C.H. Wang, M.-Z. Wang, M. Watanabe, B.D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, C.C. Zhang, J. Zhang, Z.P. Zhang, and D. Žontar
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, Electron–positron annihilation, media_common.quotation_subject, Dalitz plot, State (functional analysis), Asymmetry, law.invention, KEKB, law, Collider, media_common
Abstract: We report the observation of B0 decays to the K+π-π0 final state using a data sample of 78 fb-1 collected by the Belle detector at the KEKB e+e- collider. With no assumptions about intermediate states in the decay, the branching fraction is measured to be (36.6-4.3+4.2±3.0)×10-6. We also search for B decays to intermediate two-body states with the same K+π-π0 final state. Significant B signals are observed in the ρ(770)-K+ and K*(892)+π- channels, with branching fractions of (15.1-3.3-1.5-2.1+3.4+1.4+2.0)×10-6 and (14.8-4.4-1.0-0.9+4.6+1.5+2.4) ×10-6, respectively. The first error is statistical, the second is systematic and the third is due to the largest possible interference. Contributions from other possible two-body states will be discussed. No CP asymmetry is found in the inclusive K+π-π0 or ρ-K+ modes, and we set 90% confidence level bounds on the asymmetry of -0.12
Published: 2004

25. MCP-PMT timing property for single photons

Author: Y. Miyabayashi, N. Kishimoto, M Kojima, Yuji Enari, N. Sato, H. Yanase, T. Hokuue, T. Matsuishi, Kenji Itoh, Y. Kozakai, Takayoshi Ohshima, T. Kubota, A. Sugi, M. Tomita, Toru Iijima, K. Inami, Kiyoshi Hayasaka, S. Tokuda, K. Senyo, Y Kuriyama, S. Yoshino, Yusuke Kawakami, and M. Akatsu
Subjects: Physics, Nuclear and High Energy Physics, Scintillation, Photomultiplier, Photon, Physics::Instrumentation and Detectors, business.industry, Resolution (electron density), Radiation, Magnetic field, Optics, Ballistic photon, business, Instrumentation, Cherenkov radiation
Abstract: We have measured the performance, especially the timing properties, of micro-channel plate photo-multiplier tubes (MCP-PMTs) by irradiating with single photons with/without a magnetic field. A time resolution of σ=30– 35 ps was obtained for single photons under 1.5 T . With an MCP-PMT, a small time-of-flight counter, by means of Cherenkov light radiation instead of scintillation light has been prepared, and a time resolution σ∼10 ps was attained for a high-energy π-beam by multiple photons.
Published: 2004

26. Search for neutrinoless decays τ→3ℓ

Author: Y. Yusa, T. Nagamine, A. Yamaguchi, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A.M. Bakich, E. Banas, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T.E. Browder, M.-C. Chang, B.G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, M. Danilov, L.Y. Dong, S. Eidelman, V. Eiges, Y. Enari, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, J.H. Kang, J.S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H.O. Kim, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y.-J. Kwon, S.H. Lee, T. Lesiak, J. Li, S.-W. Lin, J. MacNaughton, T. Matsumoto, A. Matyja, Y. Mikami, W. Mitaroff, H. Miyata, D. Mohapatra, G.R. Moloney, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, H. Park, K.S. Park, N. Parslow, J.-P. Perroud, L.E. Piilonen, A. Poluektov, N. Root, H. Sagawa, S. Saitoh, Y. Sakai, T.R. Sarangi, O. Schneider, A.J. Schwartz, S. Semenov, K. Senyo, M.E. Sevior, H. Shibuya, B. Shwartz, J.B. Singh, N. Soni, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, Y. Unno, S. Uno, G. Varner, C.C. Wang, C.H. Wang, Y. Yamada, Y. Yamashita, M. Yamauchi, H. Yanai, J. Zhang, Z.P. Zhang, V. Zhilich, T. Ziegler, and D. Žontar
Subjects: Nuclear physics, Physics, Particle physics, Nuclear and High Energy Physics, KEKB, Electron–positron annihilation, TAU lepton flavor violation, Lepton
Abstract: We have searched for neutrinoless τ lepton decays into three charged leptons using an 87.1fb-1 data sample collected with the Belle detector at the KEKB e+e- collider. Since the number of signal candidate events is compatible with that expected from the background, we set 90% confidence level upper limits on the branching fractions in the range (1.9-3.5)×10-7 for various decay modes τ -→l-l+l- where l represents e or μ. © 2004 Published by Elsevier B.V.
Published: 2004
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27. Search for lepton flavor-violating τ → μγ decay

Author: T. Ohshimaa, T. Hokuue, and K. Inami
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Signal region, Radiative transfer, Limit (mathematics), Event (particle physics), Atomic and Molecular Physics, and Optics, Flavor, Belle experiment, Lepton
Abstract: We search for the lepton flavor-violating τ → μγ decay using 29.7 million τ pairs accumulated by the Belle experiment. The main background sources are found to be τ pairs with τ → μνν decay and radiative μμ events. One event is observed in the signal region, while 2.5 ± 0.6 background events are expected. A preliminary upper limit Br(τ → μγ) < 6 × 107 at the 90% confidence limit is obtained.
Published: 2003

28. Search for the Electric Dipole Moment of the τ Lepton

Author: K. Inami, K. Abe, R. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A.M. Bakich, Y. Ban, E. Banas, P.K. Behera, I. Bizjak, A. Bondar, T.E. Browder, P. Chang, Y. Chao, B.G. Cheon, R. Chistov, Y. Choi, Y.K. Choi, L.Y. Dong, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, C. Hagner, F. Handa, T. Hara, H. Hayashii, M. Hazumi, I. Higuchi, T. Higuchi, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, T. Igaki, T. Iijima, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, H.K. Jang, J.H. Kang, J.S. Kang, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, H.O. Kim, Hyunwoo Kim, J.H. Kim, S.K. Kim, S. Korpar, P. Krokovny, R. Kulasiri, A. Kuzmin, Y.-J. Kwon, J.S. Lange, G. Leder, S.H. Lee, J. Li, D. Liventsev, R.-S. Lu, J. MacNaughton, F. Mandl, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, H. Miyake, H. Miyata, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J.W. Nam, S. Nishida, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Park, K.S. Park, L.S. Peak, J.-P. Perroud, L.E. Piilonen, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, O. Schneider, S. Semenov, K. Senyo, M.E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J.B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S.Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G.N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, Y. Unno, S. Uno, G. Varner, K.E. Varvell, C.C. Wang, Y. Watanabe, B.D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, Y. Yusa, Z.P. Zhang, V. Zhilich, and D. Žontar
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Electric dipole moment, Form factor (quantum field theory), FOS: Physical sciences, Observable, Optimal observable, Atomic and Molecular Physics, and Optics, High Energy Physics - Experiment, law.invention, High Energy Physics - Experiment (hep-ex), Dipole, CP violation, KEKB, law, Tau, Signature (topology), Collider, Lepton
Abstract: We have searched for a T/CP violation signature arising from an electric dipole form factor (d_tau) of the tau lepton in the e+e- -> tau+tau- reaction. Using an optimal observable method for 29.5 fb^{-1} of data collected with the Belle detector at the KEKB collider at sqrt{s}=10.58 GeV, we obtained the preliminary result Re(d_tau) = (1.15 +- 1.70) x 10^{-17} ecm and Im(d_tau) = (-0.83 +- 0.86) x 10^{-17} ecm for the real and imaginary parts of d_tau, respectively, and set the 95% confidence level limits -2.2 < Re(d_tau) < 4.5 (10^{-17} ecm) and -2.5 < Im(d_tau) < 0.8 (10^{-17} ecm)., Invited talk at the Seventh International Workshop on Tau Lepton Physics (TAU02), Santa Cruz, Ca, USA, Sept 2002, 8 pages, LaTeX, 19 eps figures
Published: 2003

29. Study of →Dππ decays

Author: A Satpathy, K Abe, R Abe, T Abe, I Adachi, H Aihara, M Akatsu, Y Asano, T Aso, T Aushev, A.M Bakich, Y Ban, A Bay, I Bedny, P.K Behera, A Bondar, A Bozek, M Bračko, T.E Browder, B.C.K Casey, P Chang, Y Chao, K.-F Chen, B.G Cheon, R Chistov, S.-K Choi, Y Choi, M Danilov, L.Y Dong, S Eidelman, V Eiges, C Fukunaga, N Gabyshev, A Garmash, T Gershon, B Golob, J Haba, T Hara, N.C Hastings, H Hayashii, M Hazumi, I Higuchi, L Hinz, T Hokuue, W.-S Hou, H.-C Huang, T Igaki, Y Igarashi, T Iijima, K Inami, A Ishikawa, R Itoh, H Iwasaki, Y Iwasaki, H.K Jang, J.H Kang, P Kapusta, S.U Kataoka, N Katayama, H Kawai, Y Kawakami, N Kawamura, T Kawasaki, H Kichimi, D.W Kim, H.J Kim, Hyunwoo Kim, S.K Kim, K Kinoshita, S Kobayashi, P Krokovny, R Kulasiri, S Kumar, A Kuzmin, Y.-J Kwon, S.H Lee, J Li, D Liventsev, R.-S Lu, J MacNaughton, G Majumder, F Mandl, S Matsumoto, T Matsumoto, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, T Mori, T Nagamine, Y Nagasaka, T Nakadaira, E Nakano, M Nakao, H Nakazawa, J.W Nam, Z Natkaniec, S Nishida, O Nitoh, S Noguchi, S Ogawa, T Ohshima, T Okabe, S Okuno, S.L Olsen, Y Onuki, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, C.W Park, K.S Park, J.-P Perroud, M Peters, L.E Piilonen, K Rybicki, H Sagawa, S Saitoh, Y Sakai, M Satapathy, O Schneider, S Schrenk, C Schwanda, S Semenov, K Senyo, R Seuster, H Shibuya, V Sidorov, J.B Singh, N Soni, S Stanič, M Starič, A Sugi, K Sumisawa, T Sumiyoshi, S Suzuki, S.Y Suzuki, S.K Swain, T Takahashi, F Takasaki, K Tamai, N Tamura, J Tanaka, M Tanaka, G.N Taylor, Y Teramoto, T Tomura, K Trabelsi, T Tsuboyama, T Tsukamoto, S Uehara, K Ueno, S Uno, G Varner, C.H Wang, J.G Wang, M.-Z Wang, E Won, B.D Yabsley, Y Yamada, A Yamaguchi, Y Yamashita, M Yamauchi, H Yanai, Y Yuan, C.C Zhang, Z.P Zhang, and V Zhilich
Subjects: Nuclear physics, Hadronic decay, Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Annihilation, Branching fraction, Pi, Omega
Abstract: We report on a study of $\bar{B^{0}} \to D^{(*) 0} \pi^+ \pi^-$ decays using 29.1 fb$^{-1}$ of $e^{+}e^{-}$ annihilation data recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB storage ring. Making no assumptions about the intermediate mechanism, the branching fractions for $\bar{B}^0 \to D^0 \pi^+ \pi^-$ and $\bar{B}^0 \to D^{* 0} \pi^+ \pi^-$ are determined to be $(8.0 \pm 0.6 \pm 1.5) \times 10^{-4} $ and $ (6.2 \pm 1.2 \pm 1.8) \times 10^{-4}$ respectively. An analysis of $\bar{B^{0}} \to D^{0} \pi^+ \pi^-$ candidates yields to the first observation of the color-suppressed hadronic decay $\bar{B}^0 \to D^0 \rho^0$ with the branching fraction $(2.9 \pm 1.0 \pm 0.4) \times 10^{-4}$. We measure the ratio of branching fractions ${\mathcal B}(\bar{B^0} \to D^0 \rho^0) / {\mathcal B}(\bar{B^0} \to D^0 \omega)$ = 1.6 $\pm$ 0.8.
Published: 2003

30. Progress report on Time-Of-Propagation counter—a new type of ring imaging Cherenkov detector

Author: K. Inami, A. Ishikawa, T. Matsumoto, T. Matsuishi, K. Senyo, T. Igaki, A. Sugiyama, Y. Kawakami, Y. Miyabayashi, S. Tokuda, T. Hokuue, Yuji Enari, Takayoshi Ohshima, M. Akatsu, and A. Sugi
Subjects: Physics, Nuclear and High Energy Physics, Photon, Spectrometer, business.industry, Cherenkov detector, Particle detector, Ring-imaging Cherenkov detector, Particle identification, law.invention, Nuclear physics, Nonlinear Sciences::Exactly Solvable and Integrable Systems, Optics, law, Physics::Atomic and Molecular Clusters, business, Instrumentation, Image resolution, Cherenkov radiation
Abstract: The Time-Of-Propagation (TOP) counter measures both the time and position information of radiated photons with high resolutions to distinguish the Cherenkov angles between different particle species. Current R&D status is reported. We also propose a further simplified version of the TOP-counter.
Published: 2002

31. R&D report on fine-mesh multi-anode PMT with =100 under B⩽1

Author: S. Tokuda, Y. Miyabayashi, Yuji Enari, T. Igaki, K. Senyo, Shiro Suzuki, K. Inami, T. Matsuishi, M. Hirose, T. Ohshima, K. Fujimoto, T. Matsumoto, T. Hokuue, A. Sugiyama, A. Ishikawa, Y. Kawakami, S. Matsui, A. Sugi, and M. Akatsu
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Top counter, business.industry, Electrode, Optoelectronics, Transit time, business, Instrumentation, Linear array, Anode, Magnetic field
Abstract: R&D results on a 24-anode linear-array fine-mesh photomultiplier tube (L24-PMT) are reported. Under a magnetic field of B ⩽1 and 1.5 T , we have attained a transit time spread of σ =100 and 150 ps , respectively, as well as a photoelectron collection efficiency of 85%.
Published: 2002

32. Observation of B→DKK decays

Author: A. Drutskoy, K. Abe, N. Abe, R. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A.M. Bakich, Y. Ban, E. Banas, A. Bay, I. Bedny, P.K. Behera, I. Bizjak, A. Bondar, A. Bozek, T.E. Browder, B.C.K. Casey, M.-C. Chang, P. Chang, Y. Chao, K.-F. Chen, B.G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y.K. Choi, M. Danilov, L.Y. Dong, S. Eidelman, V. Eiges, Y. Enari, C.W. Everton, F. Fang, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, R. Guo, J. Haba, T. Hara, Y. Harada, H. Hayashii, M. Hazumi, E.M. Heenan, I. Higuchi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, S.-C. Hsu, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, Y. Iwasaki, H.K. Jang, J.H. Kang, J.S. Kang, P. Kapusta, S.U. Kataoka, N. Katayama, H. Kawai, Y. Kawakami, T. Kawasaki, H. Kichimi, D.W. Kim, Heejong Kim, H.J. Kim, Hyunwoo Kim, T.H. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, G. Leder, S.H. Lee, J. Li, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, Y. Miyabayashi, H. Miyake, H. Miyata, G.R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J.W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, F. Ohno, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C.W. Park, H. Park, L.S. Peak, J.-P. Perroud, M. Peters, L.E. Piilonen, N. Root, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, H. Sakamoto, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, S. Semenov, K. Senyo, R. Seuster, M.E. Sevior, H. Shibuya, V. Sidorov, J.B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S.Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G.N. Taylor, Y. Teramoto, S. Tokuda, M. Tomoto, T. Tomura, S.N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K.E. Varvell, C.C. Wang, C.H. Wang, J.G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B.D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, P. Yeh, Y. Yusa, J. Zhang, Z.P. Zhang, V. Zhilich, and D. Žontar
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, KEKB, law, Invariant mass, Polarization (waves), Collider, law.invention
Abstract: The B -> D^{(*)} K^- K^{(*)0} decays have been observed for the first time. The branching fractions of the B -> D^{(*)} K^- K^{(*)0} decay modes are measured. Significant signals are found for the B -> D^{(*)} K^- K^{*0} and B^- -> D^0 K^- K^0_S decay modes. The invariant mass and polarization distributions for the K^-K^{*0} and K^-K^0_S subsystems have been studied. For the K^-K^{*0} sybsystem these distributions agree well with those expected for two-body B -> D^{(*)} a_1^-(1260) decays, with a_1^-(1260) -> K^- K^{*0}. The analysis was done using 29.4 fb^{-1} of data collected with the Belle detector at the e^+ e^- asymmetric collider KEKB.
Published: 2002

33. Study of B→ρπ decays at Belle

Author: A. Gordon, Y. Chao, K. Abe, N. Abe, R. Abe, T. Abe, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A.M. Bakich, Y. Ban, A. Bay, I. Bedny, P.K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T.E. Browder, B.C.K. Casey, M.-C. Chang, P. Chang, B.G. Cheon, R. Chistov, Y. Choi, Y.K. Choi, M. Danilov, L.Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C.W. Everton, F. Fang, H. Fujii, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, R. Guo, J. Haba, T. Hara, Y. Harada, N.C. Hastings, H. Hayashii, M. Hazumi, E.M. Heenan, I. Higuchi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S.R. Hou, W.-S. Hou, S.-C. Hsu, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, Y. Iwasaki, H.K. Jang, J.H. Kang, J.S. Kang, N. Katayama, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D.W. Kim, Heejong Kim, H.J. Kim, H.O. Kim, Hyunwoo Kim, S.K. Kim, T.H. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J.S. Lange, G. Leder, S.H. Lee, J. Li, A. Limosani, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, S. Matsumoto, T. Matsumoto, W. Mitaroff, K. Miyabayashi, Y. Miyabayashi, H. Miyake, H. Miyata, G.R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J.W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C.W. Park, H. Park, L.S. Peak, J.-P. Perroud, M. Peters, L.E. Piilonen, J.L. Rodriguez, F.J. Ronga, N. Root, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, M.E. Sevior, H. Shibuya, V. Sidorov, J.B. Singh, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S.Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G.N. Taylor, Y. Teramoto, S. Tokuda, S.N. Tovey, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K.E. Varvell, C.C. Wang, C.H. Wang, J.G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B.D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, P. Yeh, Y. Yuan, Y. Yusa, J. Zhang, Z.P. Zhang, Y. Zheng, and D. Žontar
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Pi, B meson
Abstract: This paper describes a study of B meson decays to the pseudoscalar-vector final state \rho\pi using 31.9\times 10^6 B\bar{B} events collected with the Belle detector at KEKB. The branching fractions B(B^+ \to \rho^0\pi^+) = (8.0^{+2.3+0.7}_{-2.0-0.7}) \times 10^{-6} and B(B^0 -> \rho^{+-} \pi^{-+}) = (20.8^{+6.0+2.8}_{-6.3-3.1}) \times 10^{-6} are obtained. In addition, a 90% confidence level upper limit of B(B^0 \to \rho^0\pi^0) < 5.3 \times 10^{-6}is reported.
Published: 2002

34. Measurement of χ2 production in two-photon collisions

Author: K. Abe, R. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A.M. Bakich, Y. Ban, E. Banas, A. Bay, P.K. Behera, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, B.C.K. Casey, P. Chang, Y. Chao, B.G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, M. Danilov, L.Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, R. Guo, F. Handa, T. Hara, Y. Harada, H. Hayashii, M. Hazumi, E.M. Heenan, I. Higuchi, T. Hojo, T. Hokuue, Y. Hoshi, K. Hoshina, S.R. Hou, W.-S. Hou, H.-C. Huang, T. Igaki, Y. Igarashi, K. Inami, A. Ishikawa, R. Itoh, M. Iwamoto, H. Iwasaki, Y. Iwasaki, H.K. Jang, J. Kaneko, J.H. Kang, J.S. Kang, P. Kapusta, S.U. Kataoka, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D.W. Kim, Heejong Kim, H.J. Kim, H.O. Kim, Hyunwoo Kim, S.K. Kim, T.H. Kim, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, G. Leder, S.H. Lee, J. Li, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, S. Matsumoto, T. Matsumoto, K. Miyabayashi, H. Miyake, H. Miyata, G.R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, J.W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, F. Ohno, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C.W. Park, H. Park, K.S. Park, L.S. Peak, J.-P. Perroud, M. Peters, L.E. Piilonen, N. Root, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, M.E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J.B. Singh, S. Stanič, M. Starič, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S.K. Swain, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G.N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, S.N. Tovey, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, S.E. Vahsen, G. Varner, K.E. Varvell, C.C. Wang, C.H. Wang, J.G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B.D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Yashima, Y. Yuan, Y. Yusa, J. Zhang, Z.P. Zhang, V. Zhilich, and D. Žontar
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Branching fraction, Product (mathematics), High Energy Physics::Experiment, Production (computer science), High Energy Physics - Experiment
Abstract: The production of the \chi_{c2} charmonium state in two-photon collisions has been measured with the Belle detector at the KEKB e^+e^- collider. A clear signal for \chi_{c2} --> \gamma J/\psi, J/\psi --> l^+l^- is observed in a 32.6fb^{-1} data sample accumulated at center-of-mass energies near 10.6GeV, and the product of its two-photon decay width and branching fraction is determined to be \Gamma_{\gamma\gamma}(\chi_{c2})B(\chi_{c2} --> \gamma J/\psi) B(J/\psi --> l^+l^-)= 13.5 +/- 1.3(stat.) +/- 1.1(syst.)eV., Comment: 16 pages, 5 figures, to be submitted to Phys. Lett. B
Published: 2002

35. Measurement of (→Dℓ) and determination of |V

Author: Hiroyuki Sagawa, G. Leder, D. W. Kim, Y. Watanabe, H. Kichimi, K. Tamai, M. E. Sevior, T. Tsuboyama, Masashi Hazumi, Shaji Kumar, J. L. Rodriguez, H. Miyake, M. Yamauchi, A. Murakami, Y. Zheng, S. Matsumoto, M. Satapathy, N. Kawamura, R. Abe, M. Rozanska, H. Palka, L. E. Piilonen, K. S. Park, L. S. Peak, Y. Ushiroda, R. Guo, S. Uehara, Shih-Chieh Hsu, M. Tanaka, I. Higuchi, J. Haba, J. W. Nam, S. Behari, S. Yanaka, A. Garmash, Hirokazu Ishino, T. Iijima, D. J. Jackson, S. Noguchi, Byoung Sup Ahn, D. Liventsev, H. K. Jang, R. Kulasiri, T. Aushev, T. Hojo, T. Nakadaira, N. Katayama, I. Adachi, S. Y. Suzuki, H. J. Kim, J. P. Perroud, Y. Sakai, S. R. Hou, H. Kawai, B. C. K. Casey, Yasushi Nagasaka, E.J. Prebys, S. N. Tovey, S. K. Swain, J. Zhang, R. Itoh, R. Chistov, F. Fang, K. Sumisawa, Kevin Varvell, D. Žontar, A. Bondar, S. Korpar, V.N. Zhilich, M. Takita, Masashi Yokoyama, Y. Ban, Tsukasa Aso, Ascelin Gordon, H. Aihara, E. M. Heenan, Y. Chao, B. Shwartz, Y. Iwasaki, Chikara Fukunaga, J. B. Singh, Y. Tanaka, S. K. Choi, A. Kuzmin, S. Semenov, Y. J. Kwon, Y. Igarashi, Hiroshi Sakamoto, K. Miyabayashi, S. Ogawa, Ho Kim, Kyo Yoshida, Hirokazu Ikeda, J. G. Wang, Takahiko Matsubara, T. Sumiyoshi, S. E. Vahsen, T. Tomura, L. Y. Dong, C. W. Park, E. Won, N. Tamura, T. J. Gershon, T. Hokuue, S. K. Kim, J. Yashima, K. Senyo, K. Ueno, T. Kawasaki, S. Stanič, Makoto Tomoto, N.I. Root, Heejong Kim, Kazunori Hanagaki, K. Neichi, Y. Mikami, Hitoshi Yamamoto, M. Nakao, K. Trabelsi, J. S. Kang, P. Chang, T. Takahashi, V. M. Aulchenko, H. Fujii, O. Nitoh, J. Tanaka, Masaki Fukushima, Shigeki Mori, Kazuo Abe, H. Ozaki, Y. Asano, P. Kapusta, S. Okuno, Y. Yusa, J. MacNaughton, W. S. Hou, F. Handa, M. D. Peters, T. Abe, Y. Choi, M. Yamaga, Takuya Higuchi, T. Hara, S. H. Lee, A. Ishikawa, Y. Teramoto, A. M. Bakich, Bruce Yabsley, Elzbieta Banas, T. Okabe, N. C. Hastings, Y. Yamashita, F. Takasaki, Z. Natkaniec, T. Ohshima, H. Konishi, T. Nagamine, S. Nishida, H. C. Huang, P. Križan, T. Nozaki, S. Schrenk, W. Ostrowicz, E. Nakano, C. H. Wang, N. Gabyshev, You-Jin Yuan, A. Yamaguchi, Hyunwoo Kim, C. C. Zhang, H. Shibuya, V. Eiges, Rong-Shyang Lu, J. H. Kang, J. Ryuko, T. E. Browder, Hiroyuki Iwasaki, T. Tsukamoto, A. Sugiyama, C.W. Everton, Byung Gu Cheon, K. Hara, K. Hoshina, T. Mori, S. Uno, S. Eidelman, P. Pakhlov, A. Satpathy, S. L. Olsen, H. Park, A. Bozek, T. Matsumoto, M. Z. Wang, K. Kinoshita, A. Drutskoy, P. Krokovny, Y. Nagashima, G. N. Taylor, J. S. Lange, H. Hayashii, K. Inami, Changwon Park, G. R. Moloney, Y. Unno, P. Jalocha, H. W. Zhao, H. Hamasaki, Yasuhiko Yamada, H. Miyata, Prafulla Kumar Behera, Y. Hoshi, T.H. Kim, C. C. Wang, and M. Akatsu
Subjects: Physics, Nuclear and High Energy Physics, Muon, KEKB, Branching fraction, Cabibbo–Kobayashi–Maskawa matrix, Electron–positron annihilation, Analytical chemistry, Form factor (quantum field theory), Resonance, Electron, Atomic physics
Abstract: We present a measurement of the branching fraction for the semileptonic B decay B 0 →D + l − ν , where l− can be either an electron or a muon. We find Γ( B 0 →D + l − ν )=(13.79±0.76±2.51) ns −1 , and the resulting branching fraction B ( B 0 →D + l − ν )=(2.13±0.12±0.39)% , where the first error is statistical and the second systematic. We also investigate the B 0 →D + l − ν form factor and the implications of the result for |Vcb|. From a fit to the differential decay distribution we obtain the rate normalization |Vcb|FD(1)=(4.11±0.44±0.52)×10−2. Using a theoretical calculation of FD(1), the Cabibbo–Kobayashi–Maskawa matrix element |Vcb|=(4.19±0.45±0.53±0.30)×10−2 is obtained, where the last error comes from the theoretical uncertainty of FD(1). The results are based on a data sample of 10.2fb−1 recorded at the ϒ(4S) resonance with the Belle detector at the KEKB e+e− collider.
Published: 2002

36. Determination of |V| using the semileptonic decay →De

Author: K. Abe, R. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A.M. Bakich, Y. Ban, E. Banas, S. Behari, P.K. Behera, A. Bondar, A. Bozek, T.E. Browder, B.C.K. Casey, P. Chang, Y. Chao, B.G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, L.Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, C.W. Everton, F. Fang, H. Fujii, C. Fukunaga, M. Fukushima, N. Gabyshev, A. Garmash, T. Gershon, A. Gordon, R. Guo, J. Haba, H. Hamasaki, K. Hanagaki, F. Handa, K. Hara, T. Hara, N.C. Hastings, H. Hayashii, M. Hazumi, E.M. Heenan, I. Higuchi, T. Higuchi, T. Hojo, T. Hokuue, Y. Hoshi, K. Hoshina, S.R. Hou, W.-S. Hou, S.-C. Hsu, H.-C. Huang, Y. Igarashi, T. Iijima, H. Ikeda, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, Y. Iwasaki, D.J. Jackson, P. Jalocha, H.K. Jang, J.H. Kang, J.S. Kang, P. Kapusta, N. Katayama, H. Kawai, N. Kawamura, T. Kawasaki, H. Kichimi, D.W. Kim, Heejong Kim, H.J. Kim, H.O. Kim, Hyunwoo Kim, S.K. Kim, T.H. Kim, K. Kinoshita, H. Konishi, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J.S. Lange, G. Leder, S.H. Lee, D. Liventsev, R.-S. Lu, J. MacNaughton, T. Matsubara, S. Matsumoto, T. Matsumoto, Y. Mikami, K. Miyabayashi, H. Miyake, H. Miyata, G.R. Moloney, S. Mori, T. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, Y. Nagashima, T. Nakadaira, E. Nakano, M. Nakao, J.W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C.S. Park, C.W. Park, H. Park, K.S. Park, L.S. Peak, J.-P. Perroud, M. Peters, L.E. Piilonen, E. Prebys, J.L. Rodriguez, N. Root, M. Rozanska, J. Ryuko, H. Sagawa, Y. Sakai, H. Sakamoto, M. Satapathy, A. Satpathy, S. Schrenk, S. Semenov, K. Senyo, M.E. Sevior, H. Shibuya, B. Shwartz, J.B. Singh, S. Stanič, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S.Y. Suzuki, S.K. Swain, T. Takahashi, F. Takasaki, M. Takita, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, Y. Tanaka, G.N. Taylor, Y. Teramoto, M. Tomoto, T. Tomura, S.N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, S.E. Vahsen, K.E. Varvell, C.C. Wang, C.H. Wang, J.G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B.D. Yabsley, Y. Yamada, M. Yamaga, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, S. Yanaka, J. Yashima, M. Yokoyama, K. Yoshida, Y. Yuan, Y. Yusa, C.C. Zhang, J. Zhang, H.W. Zhao, Y. Zheng, V. Zhilich, and D. Žontar
Subjects: Nuclear physics, Physics, Semileptonic decay, Nuclear and High Energy Physics, KEKB, Branching fraction, Electron–positron annihilation, Form factor (quantum field theory), Value (computer science), Resonance, Storage ring
Abstract: We present a measurement of the Cabibbo–Kobayashi–Maskawa (CKM) matrix element |Vcb| using a 10.2 fb−1 data sample recorded at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric e+e− storage ring. By extrapolating the differential decay width of the B 0 →D ∗+ e − ν decay to the kinematic limit at which the D ∗+ is at rest with respect to the B 0 , we extract the product of |Vcb| with the normalization of the decay form factor F(1), |Vcb|F(1)=(3.54±0.19±0.18)×10−2, where the first error is statistical and the second is systematic. A value of |Vcb|=(3.88±0.21±0.20±0.19)×10−2 is obtained using a theoretical calculation of F(1), where the third error is due to the theoretical uncertainty in the value of F(1). The branching fraction B ( B 0 →D ∗+ e − ν ) is measured to be (4.59±0.23±0.40)×10−2.
Published: 2002

37. HAPD time-resolution study under single-photon irradiation

Author: Y. Higashino, K. Misono, A. Sugiyama, Y. Enari, Shiro Suzuki, M. Hirose, A. Sugi, T. Hokuue, M. Akatsu, A. Ishikawa, S. Matsui, Makoto Tomoto, K. Fujimoto, Takayoshi Ohshima, T. Matsumoto, and K. Inami
Subjects: Physics, Nuclear and High Energy Physics, Photon, business.industry, Resolution (electron density), Photon irradiation, Time resolution, Avalanche photodiode, Photocathode, Optics, Optoelectronics, business, Instrumentation, Diode, Voltage
Abstract: We have studied the timing property of a Hybrid Avalanche PhotoDiode, Hamamatsu R7110U-07, and attained a time resolution of σ t ∼150 ps for single photons and ⩽100 ps for a few photons under certain conditions of photocathode voltage and diode reverse bias voltage. Relation between the achievable timing resolution and a multiplication gain is discussed, especially in realizing σ t ⩽100 ps for single photons.
Published: 2001

38. Development of a 24-anode linear-array fine-mesh PMT with 85% photoelectron detection efficiency and 100 ps TTS at B≤1

Author: T. Matsumoto, M. Hirose, Akihisa Ishikawa, Y. Higashino, A. Sugiyama, Y. Hotta, Shiro Suzuki, T. Fujita, Makoto Tomoto, K. Fujimoto, M. Akatsu, T. Hokuue, Y. Enari, K. Misono, Takayoshi Ohshima, A. Sugi, S. Matsui, A. Suzuki, and K. Inami
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Physics::Instrumentation and Detectors, business.industry, Dynode, Transit time, Photocathode, Anode, Linear array, Magnetic field, Top counter, Optoelectronics, business, Instrumentation
Abstract: By shortening the distance between the photocathode and the first dynode to 1 mm and using a finer mesh size of 2500 lines/in. with , a 24 anode linear-array of fine-mesh photomultiplier tube has produced a clear single-photon peak in its pulse-height distribution under a strong magnetic field of , and provided of transit time spread (TTS) and 85% of photoelectron detection efficiency.
Published: 2001

39. 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

40. Observation ofe+e−→K+K−J/ψvia initial-state radiation at Belle

Author: O. Nitoh, H. Miyata, Hiroaki Aihara, Y. Hoshi, J. Schümann, K. Hayasaka, L. S. Peak, A. Ishikawa, S. E. Lee, T. Nozaki, C. C. Wang, Chang-Zheng Yuan, F. Takasaki, S. Nishida, M. Starič, D. Liventsev, C. W. Park, P. Križan, K. Vervink, G. S. Varner, D. H. Kah, Y. Iwasaki, Y. J. Kwon, R. Itoh, Masashi Hazumi, H. Miyake, P. Wang, Yu. V. Usov, O. Schneider, M. Shapkin, A. Somov, Y. J. Kim, S. Uehara, H. Ha, S. Uno, H. J. Hyun, S. Noguchi, K. Senyo, P. Pakhlov, J. H. Kang, T. Kawasaki, C. P. Shen, H. Sahoo, J. Dalseno, Y. Miyazaki, B. G. Cheon, I. Adachi, H. Park, T. Uglov, I. Tikhomirov, T. Hokuue, A. Chen, M. Yamauchi, S. Villa, R. Mizuk, T. E. Browder, D. Mohapatra, A. Yamaguchi, Jasvinder A. Singh, S. W. Lin, Yoshinobu Unno, U. Bitenc, M. Danilov, C. C. Kuo, E. Won, S. Eidelman, Y. Choi, G. R. Moloney, A.S. Kuzmin, M. Nakao, S. McOnie, P. Krokovny, X. L. Wang, S. Ogawa, D. Epifanov, W. S. Hou, K. Arinstein, O. Zyukova, Zhenyu Zhang, Y. Sakai, Vladislav Balagura, S. L. Olsen, A. Matyja, M. Dash, B. Golob, Y. Chao, F. Mandl, K. Tamai, Rakesh Kumar, M. E. Sevior, Y. Yamashita, T. Sumiyoshi, L. E. Piilonen, M. Tanaka, G. Pakhlova, I. S. Cho, S. Okuno, R. Chistov, C. H. Wang, T. Aushev, J. Haba, C. C. Zhang, H. Shibuya, D. Heffernan, Y. Teramoto, Bruce Yabsley, Tatiana Medvedeva, Hirokazu Ishino, H. Kichimi, H. Kawai, T. Lesiak, W. T. Chen, W. A. Mitaroff, Yasushi Nagasaka, V. M. Aulchenko, E. L. Barberio, K. Miyabayashi, K. Inami, K. Kinoshita, Samo Stanič, Y. Watanabe, B. Shwartz, A. Bondar, M. J. Lee, K. Belous, S. Korpar, Jolanta Brodzicka, M. Bračko, Anirban Das, A. M. Bakich, T. Ohshima, J. G. Shiu, N. Gabyshev, Phillip Urquijo, and A. Zupanc
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle decay, Positron, Electron–positron annihilation, Resonance, State (functional analysis), Radiation, Particle identification
Abstract: The process e+e-→K+K-J/ψ is observed for the first time via initial-state radiation. The cross section of e+e-→K+K-J/ψ for center-of-mass energies between threshold and 6.0 GeV is measured using 673fb-1 of data collected with the Belle detector on and off the Υ(4S) resonance. No significant signal for Y(4260)→K+K-J/ψ is observed, and we determine B(Y(4260)→K+K-J/ψ)Γ(Y(4260)→e+e-)
Published: 2008

41. Measurements of time-dependentCPviolation inB0→ωKS0,f0(980)KS0,KS0π0andK+K−KS0decays

Author: Y. Chao, K.-F. Chen, H. Miyake, O. Tajima, K. Trabelsi, K. Abe, I. Adachi, H. Aihara, D. Anipko, A. M. Bakich, E. Barberio, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, M. Bračko, T. E. Browder, M.-C. Chang, P. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hara, T. Hara, N. C. Hastings, H. Hayashii, M. Hazumi, D. Heffernan, T. Higuchi, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. J. Kim, H. O. 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, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, T. Matsumoto, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, Y. Nakahama, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, 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, K. Sumisawa, T. Sumiyoshi, S. 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, Y. Usov, G. Varner, K. E. Varvell, S. Villa, A. Vinokurova, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, V. Zhilich, V. Zhulanov, and A. Zupanc
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle decay, Positron, Distribution (number theory), media_common.quotation_subject, Electron–positron annihilation, CP violation, Electron, Asymmetry, Particle identification, media_common
Abstract: Reference EPFL-ARTICLE-154434doi:10.1103/PhysRevD.76.091103View record in Web of Science Record created on 2010-11-05, modified on 2017-05-12
Published: 2007

42. 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

43. 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

44. 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

45. 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

46. 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

47. Study ofB+→pΛ¯γ,pΛ¯π0andB0→pΛ¯π−

Author: D. Liventsev, I. Bizjak, G. S. Varner, Y. Chao, A. Ishikawa, S. E. Lee, G. R. Moloney, R. Itoh, F. Takasaki, C. W. Park, Y.-J. Lee, P. Križan, T. Iijima, M. C. Chang, A. Chen, Rakesh Kumar, Y. Sakai, P. Wang, Yu. V. Usov, T. Sumiyoshi, Y. Watanabe, H. Palka, L. E. Piilonen, M. Shapkin, G. Pakhlova, Y. J. Kim, S. Blyth, H. Kichimi, H. Ozaki, H. J. Hyun, Joowon Lee, Andrey Sokolov, T. Lesiak, M. Tanaka, R. Chistov, R. Pestotnik, N. Soni, M. Z. Wang, K. Kinoshita, J. H. Kang, W. T. Chen, H. Stoeck, Y. Miyazaki, V.N. Zhilich, M. Dash, I. Bedny, A. Zupanc, X. C. Tian, J. Dalseno, T. E. Browder, M. J. Lee, T. Hokuue, M. Bračko, D. Heffernan, W. A. Mitaroff, Q. L. Xie, S. Cole, O. Nitoh, Kazuo Abe, C. C. Kuo, Tatiana Medvedeva, Young-Il Choi, S. Okuno, F. Mandl, Vladimir Zhulanov, K. Tamai, M. Starič, B. G. Cheon, S. Nishida, T. Aushev, K. S. Park, K. Senyo, D. Anipko, K. Inami, Y. Teramoto, K. Vervink, K. Ueno, A. Imoto, T. Kawasaki, N. Satoyama, S. Eidelman, A. M. Bakich, P. Pakhlov, Y. Choi, G. Gokhroo, T. Ohshima, J. Haba, A. J. Schwartz, H. Park, A. Bondar, K. Belous, Y. Iwasaki, A. Yamaguchi, S. W. Lin, Y. J. Kwon, E. Won, N. J. Joshi, H. Miyake, O. Schneider, A. Vinokurova, Y. Unno, A. Somov, P. Krokovny, I. Adachi, W. S. Hou, S. Villa, R. Mizuk, K. F. Chen, S. Uehara, H. Ha, N. Katayama, S. Bahinipati, D. H. Kah, Kevin Varvell, Y. B. Hsiung, H. Aihara, H. Miyata, Y. Hoshi, J. Schümann, K. Hayasaka, Y. Onuki, S. Fratina, Z. P. Zhang, T. Matsumoto, M. Nakao, S. McOnie, B. Shwartz, K. Ikado, Masashi Hazumi, T. Uglov, Motoki Iwasaki, S. Uno, T. Tsukamoto, H. Shibuya, Y. Yamashita, W. Ostrowicz, I. S. Cho, and C. H. Wang
Subjects: Physics, Nuclear and High Energy Physics, Angular distribution, Web of science, Library science
Abstract: Reference EPFL-ARTICLE-154390doi:10.1103/PhysRevD.76.052004View record in Web of Science Record created on 2010-11-05, modified on 2017-12-10
Published: 2007

48. 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

49. 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

50. Observation of the decayB¯0→Ds+Λp¯

Author: T. Medvedeva, R. Chistov, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, A. M. Bakich, V. Balagura, 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, W. T. Chen, B. G. Cheon, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, 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, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y.-J. Kwon, G. Leder, M. J. Lee, S. E. Lee, T. Lesiak, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, Y. Nagasaka, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, 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, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, 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, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, and A. Zupanc
Subjects: Nuclear physics, Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Luminosity (scattering theory), KEKB, law, Hyperon, Resonance, Lambda baryon, Collider, Particle identification, law.invention
Abstract: We report the first observation of the decay B0→Ds+Λ p with a statistical significance of 6.6σ. We measure B(B0→Ds+Λp)=(2.9±0.7±0.5±0.4) ×10-5, where the first error is statistical, the second is systematic, and the third error comes from the uncertainty in B(Ds+→π+). The data used for this analysis was accumulated at the Υ(4S) resonance, using the Belle detector at the KEKB asymmetric-energy e+e- collider. The integrated luminosity of the data sample is 414fb-1, corresponding to 449×106 BB pairs. © 2007 The American Physical Society.
Published: 2007

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