Search

Your search keyword '"R. Khan"' showing total 84 results
Start Over Author "R. Khan" Journal physical review letters
84 results on '"R. Khan"'

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

Author

R, Seidl, K, Hasuko, K, Abe, I, Adachi, H, Aihara, D, Anipko, Y, Asano, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, W, Bartel, A, Bay, U, Bitenc, I, Bizjak, S, Blyth, A, Bozek, M, Bracko, T E, Browder, P, Chang, A, Chen, B G, Cheon, Y, Choi, Y K, Choi, A, Chuvikov, J, Dalseno, M, Danilov, M, Dash, J, Dragic, S, Eidelman, S, Fratina, N, Gabyshev, T, Gershon, A, Go, G, Gokhroo, B, Golob, A, Gorisek, M, Grosse Perdekamp, H C, Ha, K, Hayasaka, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, P, Kapusta, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, S K, Kim, S M, Kim, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, J, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, D, Liventsev, F, Mandl, T, Matsumoto, A, Matyja, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, T, Mori, I, Nakamura, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, A, Ogawa, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, N, Parslow, L S, Peak, R, Pestotnik, L E, Piilonen, Y, Sakai, N, Sato, N, Satoyama, T, Schietinger, O, Schneider, J, Schümann, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, A, Somov, N, Soni, R, Stamen, S, Stanic, M, Staric, K, Sumisawa, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, T, Tsukamoto, S, Uehara, T, Uglov, S, Uno, P, Urquijo, Y, Usov, G, Varner, S, Villa, C C, Wang, C H, Wang, Y, Watanabe, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, Y, Yusa, L M, Zhang, Z P, Zhang, V, Zhilich, and D, Zürcher

Abstract

The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e(+)e(-) annihilation at a center-of-mass energy of 10.52 GeV, which can be attributed to a transverse polarization of the primordial quarks. The measurement was performed using a sample of 79 x 10(6) hadronic events collected with the Belle detector.

Published
2006

2. 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
Full Text
View/download PDF

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

Author

K. Belous, M. Shapkin, A. Sokolov, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, M. Fujikawa, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, H. Ha, J. Haba, Y. Hasegawa, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, O. Schneider, J. Schümann, R. Seidl, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, A. Vinokurova, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich, V. Zhulanov, and A. Zupanc

Subjects
Nuclear physics, Physics, Particle decay, Particle physics, Pion, Relative mass, General Physics and Astronomy, Limit (mathematics), Lepton, Standard Model
Abstract

The mass of the τ lepton has been measured in the decay mode τ→3πντ using a pseudomass technique. The result obtained from 414fb-1 of data collected with the Belle detector is Mτ=[1776.61±0. 13(stat)±0.35(sys)]MeV/c2. The upper limit on the relative mass difference between positive and negative τ leptons is |Mτ+-Mτ-|/ Mτ

Published
2007
Full Text
View/download PDF

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

Author

Masashi Hazumi, S. Cole, Masahiro Fujikawa, L. S. Peak, K. Tanabe, P. Goldenzweig, J. S. H. Lee, R. Dowd, J. S. Kang, Takashi Kubota, Y. Uchida, G. R. Moloney, M. Grosse Perdekamp, N. Tamura, H. Stoeck, P. Krizan, H. Sahoo, B. Golob, James Mueller, A.E. Bondar, P. Krokovny, Z. Natkaniec, T. Uglov, Yoji Hasegawa, C. W. Park, E. Won, H. Sakaue, Y.T. Tsai, Yu Nakahama, Daniel Robert Marlow, Marco Barbero, K. Trabelsi, S. Banerjee, A. Murakami, Y. Iwasaki, V.N. Zhilich, W. A. Mitaroff, Young-Il Choi, K. Miyabayashi, B. Shwartz, T. Ziegler, Y. J. Kwon, O. Schneider, M. Yamauchi, Tariq Aziz, N. Kikuchi, Seema Bahinipati, R. Seidl, K. Hoshina, S. Nishida, Tapas Sarangi, M. Rozanska, Kevin Varvell, M. Shapkin, K. Aoki, M. Dash, J.H. Choi, Y. Choi, M. Iwabuchi, D. Epifanov, M. Starič, Yuji Enari, T. Higuchi, T. Seki, H. Nakazawa, G. Gokhroo, T. Hara, A. J. Schwartz, A. Matyja, Ilija Bizjak, V.A. Sidorov, M. Z. Wang, K. Kinoshita, S. Saitoh, Y.-T. Shen, K. Uchida, T. Aushev, R. Mizuk, Y.-J. Lee, V. M. Aulchenko, D. Anipko, H. Guler, S. Yoshino, K. S. Park, Antonio Limosani, N. Soni, M. C. Chang, Kimitaka Itoh, A. Kuzmin, J. S. Lange, J. Dragic, Vladislav Balagura, S. L. Olsen, H. Fujii, T. Mori, E. L. Barberio, Rakesh Kumar, Y. Usov, Y. F. Liu, Hiroshi Sakamoto, N. Takada, H. Palka, L. E. Piilonen, M. Bračko, S. Fratina, G. N. Taylor, T. Schietinger, Z. P. Zhang, G. Pakhlova, R. Kulasiri, S. Ogawa, S. Ono, Y. Igarashi, C. C. Wang, M. Pernicka, T. Matsumoto, W. S. Hou, W. Ostrowicz, A. Go, I. Adachi, K. Arinstein, Y. Mikami, E. Nakano, Y. Ushiroda, Y. Sakai, Sadaharu Uehara, E. Kurihara, Akito Kusaka, H. Miyake, R. Chistov, H. O. Kim, Y.F. Tse, A. Somov, Jie Zhang, A. Yamaguchi, Samo Stanič, A. Kibayashi, S. Uno, C. Schwanda, K. Inami, A. Imoto, S. R. Hou, M. Nakao, I. Bedny, J. Li, Gobinda Majumder, S. Noguchi, S. McOnie, S. Y. Suzuki, A. M. Bakich, T. Ohshima, J. MacNaughton, Anton Poluektov, Osamu Tajima, K. Nishimura, T. Tsukamoto, J. B. Singh, S. K. Choi, T. E. Browder, N. Gabyshev, You-Jin Yuan, K. Sumisawa, S. Villa, Y. Miyazaki, N. Satoyama, P. Schonmeier, T. J. Gershon, K. Neichi, A. Zupanc, A. Chuvikov, L. Hinz, H. Hayashii, Hyunyong Kim, S. L. Blyth, T. Hokuue, A. Sokolov, K. Ikado, M. Danilov, C. C. Kuo, O. Nitoh, I. Nakamura, Y. Kozakai, Y. Ban, K. Hara, Y. Yusa, S. U. Kataoka, T. Sumiyoshi, Jeremy Dalseno, Y. B. Hsiung, K. Sayeed, S. Eidelman, C.Y. Lin, N. Parslow, L. Widhalm, P. Pakhlov, H. Miyata, N. C. Hastings, Y. Hoshi, J. Schümann, Matthew Jones, K. Hayasaka, H. Park, A. Bozek, M. H. Tanaka, C. H. Wang, U. Bitenc, T.H. Kim, A. Drutskoy, Y. J. Kim, Hiroaki Aihara, Tatiana Medvedeva, Phillip Urquijo, H. Ozaki, C. Z. Yuan, Rainer Stamen, D. Mohapatra, I. Tikhomirov, H. Ha, M. Iwasaki, N. Katayama, C. C. Zhang, B. G. Cheon, H. Shibuya, M. Watanabe, M. D. Peters, J. Haba, L.M. Zhang, Frederic Jean Ronga, Y. Yamashita, R. Pestotnik, K. Belous, S. Korpar, Jolanta Brodzicka, H. Yamamoto, T. Nagamine, Nobuaki Sato, Shimpei Yamamoto, Y. Chao, C. Jacoby, N. Kishimoto, H. R. Khan, S. K. Kim, A. Chen, Toru Iijima, Y. Unno, Kazuo Abe, Y. Asano, P. Kapusta, S. Okuno, A. Ogawa, Andrej Gorišek, A. Garmash, Hirokazu Ishino, A. Ishikawa, Y. Teramoto, Bruce Yabsley, A. Bay, S.L. Zang, T. Okabe, Yasushi Nagasaka, S. E. Lee, T. Nozaki, S. W. Lin, F. Takasaki, D. Liventsev, N.I. Root, G. S. Varner, W. T. Chen, P. Chang, J. Wicht, Jung-Hyun Kim, R. Itoh, Q. L. Xie, Tsukasa Aso, T. Nakagawa, T. Arakawa, H. Kakuno, Kai-Feng Chen, K. Senyo, K. Ueno, T. Kawasaki, D. Zurcher, J. H. Kang, A. Sugiyama, Jamal Rorie, X. C. Tian, D. Heffernan, C.-H. Wu, Y. Watanabe, H. Kichimi, T. Tsuboyama, T. Lesiak, J. Wiechczynski, G. Leder, F. Mandl, K. Tamai, and M. E. Sevior

Subjects
Physics, Particle decay, Crystallography, Annihilation, KEKB, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, General Physics and Astronomy, Resonance, Continuum (set theory), Lambda, Quantum number
Abstract

We report the results of several studies of the {lambda}{sub c}{sup +}{pi}{sup +}{pi}{sup -}X final state in continuum e{sup +}e{sup -} annihilation data collected by the Belle detector. An analysis of angular distributions in {lambda}{sub c}(2880){sup +}{yields}{sigma}{sub c}(2455){sup 0,++}{pi}{sup +,-} decays strongly favors a {lambda}{sub c}(2880){sup +} spin assignment of (5/2) over (3/2) or (1/2). We find evidence for {lambda}{sub c}(2880){sup +}{yields}{sigma}{sub c}(2520){sup 0,++}{pi}{sup +,-} decay and measure the ratio of {lambda}{sub c}(2880){sup +} partial widths {gamma}({sigma}{sub c}(2520){pi})/{gamma}({sigma}{sub c}(2455){pi})=0.225{+-}0.062{+-}0.= 025. This value favors the {lambda}{sub c}(2880){sup +} spin-parity assignment of (5/2){sup +} over (5/2){sup -}. We also report the first observation of {lambda}{sub c}(2940){sup +}{yields}{sigma}{sub c}(2455){sup 0,++}{pi}{sup +,-} decay and measure {lambda}{sub c}(2880){sup +} and {lambda}{sub c}(2940){sup +} mass and width parameters. These studies are based on a 553 fb{sup -1} data sample collected at or near the {upsilon}(4S) resonance at the KEKB collider.

Published
2007
Full Text
View/download PDF

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

Author

A. Kusaka, C. C. Wang, H. Ishino, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, M. Fujikawa, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, H. Kakuno, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, K. Miyabayashi, H. Miyake, Y. Miyazaki, R. Mizuk, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, O. Schneider, J. Schümann, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Physics, Particle physics, Particle decay, KEKB, Cabibbo–Kobayashi–Maskawa matrix, Electron–positron annihilation, Isospin, General Physics and Astronomy, Dalitz plot, Energy (signal processing), Standard Model
Abstract

We present a measurement of $CP$ asymmetry using a time-dependent Dalitz plot analysis of ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ decays based on a $414\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample containing $449\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs. The data was collected on the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. Combining our analysis with information on charged $B$ decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle ${\ensuremath{\phi}}_{2}$, $68\ifmmode^\circ\else\textdegree\fi{}l{\ensuremath{\phi}}_{2}l95\ifmmode^\circ\else\textdegree\fi{}$ as the 68.3% confidence interval for the ${\ensuremath{\phi}}_{2}$ solution consistent with the standard model (SM). A large SM-disfavored region also remains.

Published
2007
Full Text
View/download PDF

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

Author

H. Ishino, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, M. Barbero, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, H. Ha, J. Haba, K. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, Y. Iwasaki, J. H. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, A. Kibayashi, H. Kichimi, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kusaka, A. Kuzmin, Y.-J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, J. MacNaughton, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, C.-H. Wu, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Physics, Quark, Particle physics, media_common.quotation_subject, General Physics and Astronomy, Weinberg angle, Asymmetry, Standard Model, Nuclear physics, Pair production, KEKB, Isospin, CP violation, media_common
Abstract

We report a new measurement of the time-dependent CP-violating parameters in B0→π+π- decays with 535×106 BB pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider operating at the Υ(4S) resonance. We find 1464±65 B0→π+π- events and measure the CP-violating parameters Sππ=-0.61±0.10(stat)±0. 04(syst) and Aππ=+0.55±0.08(stat)±0.05(syst). We observe large direct CP violation with a significance greater than 5 standard deviations for any Sππ value. Using isospin relations, we measure the Cabibbo-Kobayashi-Maskawa quark-mixing matrix angle 2=(97±11)° for the solution consistent with the standard model and exclude the range 11°< 2

Published
2007
Full Text
View/download PDF

7. Observation ofBDecays to Two Kaons

Author

S.-W. Lin, P. Chang, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, 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, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, R. Kulasiri, C. C. Kuo, Y.-J. Kwon, J. S. Lange, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, T. Mori, I. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, K. Senyo, M. Shapkin, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Usov, G. Varner, 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, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Physics, High Energy Physics - Experiment (hep-ex), Crystallography, Particle decay, Pair production, KEKB, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, FOS: Physical sciences, General Physics and Astronomy, Atomic physics, High Energy Physics - Experiment
Abstract

Using 449 million BBbar pairs collected with the Belle detector at the KEKB asymmetric-energy e^+e^- collider, we observe clear signals for B^+-> \bar{K}^0 K^+ and B^0-> \bar{K}^0 K^0 decays with 5.3 sigma and 6.0 sigma significance, respectively. We measure the branching fractions Br(B^+-> \bar{K}^0 K^+ = (1.22^{+0.32+0.13}_{-0.28-0.16})x10^{-6} and Br(B^0-> \bar{K}^0 K^0) = (0.87^{+0.25}_{-0.20} +- 0.09)x10^{-6}, and partial-rate asymmetries A_{CP}(B^+-> \bar{K}^0 K^+) = 0.13^{+0.23}_{-0.24}+- 0.02 and A_{CP}(B^0-> \bar{K}^0 K^0) = -0.58^{+0.73}_{-0.66}+- 0.04. From a simultaneous fit we also obtain Br(B^+-> K^0��^+)= (22.8^{+0.8}_{-0.7} +- 1.3)x 10^{-6} and A_{CP}(B^+-> K^0 ��^+) = 0.03 +- 0.03 +- 0.01. The first and second error in the branching fractions and the partial-rate asymmetries are statistical and systematic, respectively. No signal is observed for B^0-> K^+ K^- decays, and for this branching fraction we set an upper limit of 4.1x10^{-7} at the 90% confidence level., 6 pages, 3 figures

Published
2007
Full Text
View/download PDF

8. Observation of the DecayB0→J/ψη

Author

M.-C. Chang, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, S. U. Kataoka, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, T. Nagamine, I. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, R. Seidl, K. Senyo, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, C. C. Zhang, L. M. Zhang, Z. P. Zhang, and A. Zupanc

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, General Physics and Astronomy, Resonance, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, law.invention, Particle decay, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider
Abstract

We report the first observation of B(0)-->J/psieta decay. These results are obtained from a data sample that contains 449 x10(6) BB[over] pairs accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a signal with a significance of 8.1 sigma and obtain a branching fraction of (9.5+/-1.7(stat)+/-0.8(syst)) x 10(-6).

Published
2007
Full Text
View/download PDF

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

Author

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

Subjects
World Wide Web, Web of science, Computer science, General Physics and Astronomy
Abstract

Reference EPFL-ARTICLE-154572doi:10.1103/PhysRevLett.98.132001View record in Web of Science Record created on 2010-11-05, modified on 2017-05-12

Published
2007
Full Text
View/download PDF

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

Author

A, Go, A, Bay, K, Abe, H, Aihara, D, Anipko, V, Aulchenko, T, Aushev, A M, Bakich, E, Barberio, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bozek, M, Bracko, T E, Browder, P, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, S, Cole, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, T, Gershon, G, Gokhroo, B, Golob, A, Gorisek, H, Ha, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, Y, Iwasaki, C, Jacoby, J H, Kang, N, Katayama, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, S K, Kim, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, J, Lee, M J, Lee, T, Lesiak, A, Limosani, S-W, Lin, Y, Liu, D, Liventsev, T, Matsumoto, A, Matyja, S, McOnie, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, T, Mori, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, S L, Olsen, Y, Onuki, P, Pakhlov, G, Pakhlova, H, Palka, C W, Park, H, Park, L S, Peak, R, Pestotnik, M, Peters, L E, Piilonen, H, Sahoo, Y, Sakai, N, Satoyama, T, Schietinger, O, Schneider, J, Schümann, A J, Schwartz, R, Seidl, K, Senyo, M, Shapkin, H, Shibuya, B, Shwartz, J B, Singh, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, T, Sumiyoshi, F, Takasaki, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Unno, S, Uno, G, Varner, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, J, Wicht, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, Z P, Zhang, V, Zhilich, and A, Zupanc

Abstract

The neutral B meson pair produced at the Upsilon(4S) should exhibit a nonlocal correlation of the type discussed by Einstein, Podolsky, and Rosen. We measure this correlation using the time-dependent flavor asymmetry of semileptonic B(0) decays, which we compare with predictions from quantum mechanics and two local realistic models. The data are consistent with quantum mechanics, and inconsistent with the other models. Assuming that some B pairs disentangle to produce B(0) and B(0) with definite flavor, we find a decoherent fraction of 0.029 +/ -0.057, consistent with no decoherence.

Published
2007

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

Author

T. Tsukamoto, H. Stoeck, T. E. Browder, H. Nakazawa, G. Gokhroo, M. Danilov, C. C. Kuo, Byung Gu Cheon, K. Ueno, H. Miyake, E. Nakano, Y. Choi, P. Pakhlov, B. Golob, Y. Watanabe, A. Somov, A. Ishikawa, A. Bay, H. Kichimi, A. J. Schwartz, P. Krian, Y. Iwasaki, S. E. Lee, Y. Chao, A.S. Kuzmin, Y. J. Kwon, F. Takasaki, T. Tsuboyama, H. Park, A. Bozek, Kai-Feng Chen, H. R. Khan, Toru Iijima, T. Lesiak, Samo Stanič, O. Schneider, R. Mizuk, S. Nishida, Y. Sakai, B. Shwartz, D. Anipko, N. Soni, H. Miyata, I. Adachi, A. Yamaguchi, C. H. Wang, Y. Hoshi, V.N. Zhilich, K. Senyo, Y. Yamashita, Jasvinder A. Singh, S. W. Lin, X. C. Tian, K. Hayasaka, E. Won, A. Zupanc, M. Nakao, O. Nitoh, M. H. Tanaka, S. Villa, Anton Poluektov, T. Kawasaki, W. A. Mitaroff, M. Starič, Young-Il Choi, P. Krokovny, D. Heffernan, Y. Onuki, Hiroaki Aihara, Tatiana Medvedeva, Y. Miyazaki, Zhenyu Zhang, M. J. Lee, D. Liventsev, S. Blyth, S. K. Choi, V. M. Aulchenko, E. L. Barberio, Phillip Urquijo, S. Uno, T. Hokuue, S. Cole, S. McOnie, I. Bizjak, M. Bračko, H. Kaji, A. Drutskoy, G. S. Varner, A. Chen, N. Satoyama, S. Uehara, H. Ha, S. R. Hou, R. Itoh, W. T. Chen, F. Mandl, T. J. Gershon, N. Katayama, K. Tamai, Yu. V. Usov, J. H. Kang, I. Tikhomirov, S. Eidelman, K. S. Park, U. Bitenc, A. Imoto, M. E. Sevior, A. M. Bakich, M. Iwasaki, C. C. Zhang, H. Shibuya, Z. Natkaniec, T. Ohshima, Vladislav Balagura, Q. L. Xie, S. L. Olsen, H. Hayashii, J. Haba, J. Dalseno, A. Bondar, K. Belous, Kazuo Abe, P. Kapusta, S. Okuno, T. Aushev, Y. Teramoto, Bruce Yabsley, N. Gabyshev, J. Schümann, I. Bedny, K. Kinoshita, L. E. Piilonen, W. S. Hou, S. Y. Suzuki, M. Shapkin, G. Pakhlova, G. N. Taylor, R. Kulasiri, Y. J. Kim, H. Ozaki, A. Matyja, K. Ikado, S. Fratina, T. Matsumoto, R. Pestotnik, Masashi Hazumi, K. Inami, J. S. H. Lee, T. Uglov, S. Ogawa, R. Chistov, R. Seidl, M. C. Chang, Rakesh Kumar, and Gobinda Majumder

Subjects
Physics, Positron, Annihilation, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, General Physics and Astronomy, Electron, State (functional analysis), Atomic physics, Radiation, Energy (signal processing), Luminosity
Abstract

We report a measurement of the exclusive e{sup +}e{sup -}{yields}D{sup (*){+-}}D*{sup {+-}} cross section as a function of center-of-mass energy near the D{sup (*)}{+-}D*{sup {+-}} threshold with initial-state radiation. A partial reconstruction technique is used to increase the efficiency and to suppress background. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 547.8 fb{sup -1}.

Published
2007
Full Text
View/download PDF

12. Observation of a Charmoniumlike State Produced in Association with aJ/ψine+e−Annihilation ats≈10.6 GeV

Author

E. Nakano, H. Ozaki, A. Yamaguchi, S. W. Lin, D. Epifanov, Masashi Hazumi, X. C. Tian, N. Tamura, C. C. Wang, T. Iijima, T. Uglov, Yoji Hasegawa, C. C. Zhang, Noriaki K. Sato, Y. Sakai, M. Starič, Marco Barbero, M. Dash, A. Chen, U. Bitenc, C. H. Wang, K. S. Park, Jie Zhang, Y. Iwasaki, D. Liventsev, Y. Yamashita, B. Golob, I. Bizjak, S. Uehara, S. L. Olsen, O. Schneider, G. Gokhroo, K. Trabelsi, G. S. Varner, H. Ha, I. Bedny, Zhilich, S. Y. Suzuki, Y. Chao, A. J. Schwartz, H. J. Kim, A. Ishikawa, I. Adachi, Y. B. Hsiung, Zhenyu Zhang, Yasushi Nagasaka, F. Takasaki, H. R. Khan, C. W. Park, T. E. Browder, T. Aushev, B. Shwartz, G. Leder, S. R. Hou, S. Villa, S. K. Choi, A. Drutskoy, Anton Poluektov, Antonio Limosani, W. A. Mitaroff, H. Miyata, Young-Il Choi, K. Miyabayashi, S. Ogawa, Y. Hoshi, F. Mandl, T. J. Gershon, H. Hayashii, E. Won, K. Hayasaka, M. Danilov, O. Nitoh, M. E. Sevior, C. C. Kuo, P. Krokovny, K. Senyo, T. Kawasaki, Y. Unno, P. Pakhlov, M. Z. Wang, K. Kinoshita, Hiroaki Aihara, J. Dalseno, J. Ying, Rainer Stamen, J. S. Lange, Aulchenko, H. Park, K. Ueno, L. Hinz, S. Nishida, W. S. Hou, Y. Mikami, K. Arinstein, A. Somov, Long Zhang, S. M. Kim, Q. L. Xie, H. Kichimi, Kazuo Abe, B. D. Yabsley, Y. Asano, P. Kapusta, S. Okuno, Y. Teramoto, R. Mizuk, T. Lesiak, M. Bračko, M. Yamauchi, A. M. Bakich, T. Ohshima, A. Chuvikov, N. Gabyshev, M. H. Tanaka, T. Sumiyoshi, Phillip Urquijo, H. Palka, L. E. Piilonen, T. Schietinger, Balagura, M. Iwasaki, J. Haba, A. Bondar, S. Korpar, Jolanta Brodzicka, R. Chistov, R. Seidl, Tariq Aziz, Y. Choi, A.S. Kuzmin, S. Eidelman, S. Cole, M. Nakao, Kevin Varvell, A. Matyja, S. Fratina, Sidorov, T. Tsukamoto, T. Matsumoto, Byung Gu Cheon, S. Uno, and L. S. Peak

Subjects
Physics, Particle physics, Annihilation, 010308 nuclear & particles physics, Electron–positron annihilation, General Physics and Astronomy, Resonance, Computer Science::Computation and Language (Computational Linguistics and Natural Language and Speech Processing), State (functional analysis), 01 natural sciences, Nuclear physics, Particle decay, KEKB, 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), 010306 general physics
Abstract

We report the first observation of a charmoniumlike state recoiling from the $J/\ensuremath{\psi}$ in the inclusive process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}+\mathrm{\text{anything}}$ at a mass of $(3.943\ifmmode\pm\else\textpm\fi{}0.006\ifmmode\pm\else\textpm\fi{}0.006)\text{ }\text{ }\mathrm{GeV}/{c}^{2}$. We also observe the decay of this state into ${D}^{*}\overline{D}$ and determine its intrinsic width to be less than $52\text{ }\text{ }\mathrm{MeV}/{c}^{2}$ at the 90% C.L. These results are obtained from a $357\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample collected with the Belle detector near the $\ensuremath{\Upsilon}(4S)$ resonance, at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider.

Published
2007
Full Text
View/download PDF

13. Measurement of InclusiveDs,D0, andJ/ψRates and Determination of theBs(*)B¯s(*)Production Fraction inbb¯Events at theΥ(5S)Resonance

Author

A. Drutskoy, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, S. Banerjee, E. Barberio, M. Barbero, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Higuchi, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, J. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Sokolov, A. Somov, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. 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, J. Wiechczynski, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Physics, Particle physics, KEKB, Pair production, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Quarkonium, Dimensionless quantity
Abstract

The inclusive production of Ds, D0, and J/ψ mesons is studied using a 1.86fb-1 data sample collected on the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The number of bb events in this Υ(5S) data sample is determined. We measure the branching fractions B(Υ(5S)→DsX)/2=(23.6±1.2±3.6)%, B(Υ(5S)→D0X)/2=(53.8±2.0±3.4)%, and B(Υ(5S)→J/ ψX)/2=(1.030±0.080±0.067)%. From the Ds and D0 inclusive branching fractions the ratio fs=(18.0±1.3±3.2)% of Bs(*)Bs(*) to the total bb quark pair production at the Υ(5S) energy is obtained in a model-dependent way. © 2007 The American Physical Society.

Published
2007
Full Text
View/download PDF

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

Author

K.-F. Chen, K. Hara, M. Hazumi, T. Higuchi, K. Miyabayashi, Y. Nakahama, K. Sumisawa, O. Tajima, Y. Ushiroda, Y. Yusa, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, S. Banerjee, E. Barberio, M. Barbero, A. Bay, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, A. Garmash, T. Gershon, A. Go, G. Gokhroo, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kakuno, J. H. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kusaka, A. Kuzmin, Y.-J. Kwon, G. Leder, J. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, Y. Liu, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, A. Murakami, T. Nagamine, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Physics, Particle physics, Particle decay, Pair production, KEKB, General Physics and Astronomy, CP violation
Abstract

We present improved measurements of $CP$-violation parameters in ${B}^{0}\ensuremath{\rightarrow}\ensuremath{\phi}{K}^{0}$, ${\ensuremath{\eta}}^{\ensuremath{'}}{K}^{0}$, ${K}_{S}^{0}{K}_{S}^{0}{K}_{S}^{0}$ decays based on a sample of $535\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB energy-asymmetric ${e}^{+}{e}^{\ensuremath{-}}$ collider. We obtain $\mathrm{sin} 2{\ensuremath{\phi}}_{1}^{\mathrm{eff}}=+0.64\ifmmode\pm\else\textpm\fi{}0.10(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.04(\mathrm{syst})$ for ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\eta}}^{\ensuremath{'}}{K}^{0}$, $+0.50\ifmmode\pm\else\textpm\fi{}0.21(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.06(\mathrm{syst})$ for ${B}^{0}\ensuremath{\rightarrow}\ensuremath{\phi}{K}^{0}$, and $+0.30\ifmmode\pm\else\textpm\fi{}0.32(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.08(\mathrm{syst})$ for ${B}^{0}\ensuremath{\rightarrow}{K}_{S}^{0}{K}_{S}^{0}{K}_{S}^{0}$ decays. We have observed $CP$ violation in the ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\eta}}^{\ensuremath{'}}{K}^{0}$ decay with a significance of 5.6 standard deviations. We also perform an improved measurement of $CP$ asymmetries in ${B}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}{K}^{0}$ decays and obtain $\mathrm{sin} 2{\ensuremath{\phi}}_{1}=+0.642\ifmmode\pm\else\textpm\fi{}0.031(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.017(\mathrm{syst})$.

Published
2007
Full Text
View/download PDF

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

Author

R, Mizuk, K, Abe, I, Adachi, H, Aihara, D, Anipko, V, Aulchenko, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, A, Bay, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, M-C, Chang, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, S, Cole, J, Dalseno, M, Danilov, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, H, Ha, J, Haba, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kaji, J H, Kang, P, Kapusta, N, Katayama, H R, Khan, H, Kichimi, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, G, Leder, J, Lee, M J, Lee, S E, Lee, T, Lesiak, S-W, Lin, D, Liventsev, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, S, McOnie, H, Miyake, H, Miyata, Y, Miyazaki, M, Nakao, Z, Natkaniec, S, Nishida, S, Ogawa, T, Ohshima, S, Okuno, Y, Onuki, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Park, K S, Park, L S, Peak, R, Pestotnik, L E, Piilonen, Y, Sakai, N, Satoyama, O, Schneider, J, Schümann, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, J B, Singh, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, S Y, Suzuki, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, Y, Usov, G, Varner, S, Villa, C H, Wang, Y, Watanabe, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, C Z, Yuan, L M, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc

Abstract

We report the results of several studies of the Lambda(c)(+)pi(+)pi(-)X final state in continuum e(+)e(-) annihilation data collected by the Belle detector. An analysis of angular distributions in Lambda(c)(2880)(+)--Sigma(c)(2455)(0,++)pi(+,-) decays strongly favors a Lambda(c)(2880)(+) spin assignment of 5/2 over 3/2 or 1/2. We find evidence for Lambda(c)(2880)(+)--Sigma(c)(2520)(0,++)pi(+,-) decay and measure the ratio of Lambda(c)(2880)(+) partial widths Gamma(Sigma(c)(2520)pi)/Gamma(Sigma(c)(2455)pi)=0.225+/-0.062+/-0.025. This value favors the Lambda(c)(2880)(+) spin-parity assignment of 5/2(+) over 5/2(-). We also report the first observation of Lambda(c)(2940)(+)--Sigma(c)(2455)(0,++)pi(+,-) decay and measure Lambda(c)(2880)(+) and Lambda(c)(2940)(+) mass and width parameters. These studies are based on a 553 fb(-1) data sample collected at or near the Upsilon(4S) resonance at the KEKB collider.

Published
2007

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

Author

G, Pakhlova, K, Abe, I, Adachi, H, Aihara, D, Anipko, V, Aulchenko, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, A, Bay, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, T E, Browder, M-C, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, S, Cole, J, Dalseno, M, Danilov, A, Drutskoy, S, Eidelman, S, Fratina, N, Gabyshev, T, Gershon, G, Gokhroo, B, Golob, H, Ha, J, Haba, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kaji, J H, Kang, P, Kapusta, N, Katayama, T, Kawasaki, H R, Khan, H, Kichimi, Y J, Kim, K, Kinoshita, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J, Lee, M J, Lee, S E, Lee, T, Lesiak, S-W, Lin, D, Liventsev, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, S, McOnie, T, Medvedeva, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, P, Pakhlov, H, Park, K S, Park, R, Pestotnik, L E, Piilonen, A, Poluektov, Y, Sakai, N, Satoyama, O, Schneider, J, Schümann, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, J B, Singh, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, S Y, Suzuki, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, Y, Usov, G, Varner, S, Villa, C H, Wang, Y, Watanabe, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, C C, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc

Abstract

We report a measurement of the exclusive e+e- --D(*)+/-D*-/+ cross section as a function of center-of-mass energy near the D(*)+/-D*-/+ threshold with initial-state radiation. A partial reconstruction technique is used to increase the efficiency and to suppress background. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 547.8 fb(-1).

Published
2007

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

Author

A, Kusaka, C C, Wang, H, Ishino, K, Abe, I, Adachi, H, Aihara, D, Anipko, V, Aulchenko, T, Aushev, A M, Bakich, E, Barberio, A, Bay, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, T E, Browder, M-C, Chang, P, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, S, Fratina, M, Fujikawa, N, Gabyshev, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, H, Ha, J, Haba, T, Hara, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kaji, H, Kakuno, J H, Kang, P, Kapusta, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J, Lee, M J, Lee, S E, Lee, T, Lesiak, A, Limosani, S-W, Lin, D, Liventsev, F, Mandl, D, Marlow, T, Matsumoto, K, Miyabayashi, H, Miyake, Y, Miyazaki, R, Mizuk, T, Mori, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, S, Noguchi, S, Ogawa, T, Ohshima, S, Okuno, Y, Onuki, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Park, K S, Park, L S, Peak, R, Pestotnik, L E, Piilonen, A, Poluektov, Y, Sakai, N, Satoyama, O, Schneider, J, Schümann, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, J B, Singh, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, S Y, Suzuki, O, Tajima, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, Y, Unno, S, Uno, P, Urquijo, Y, Ushiroda, Y, Usov, G, Varner, S, Villa, C H, Wang, M-Z, Wang, Y, Watanabe, R, Wedd, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, L M, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc

Abstract

We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B0--pi+pi-pi0 decays based on a 414 fb(-1) data sample containing 449 x 10(6) BB pairs. The data was collected on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e+ e- collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle phi2, 68 degreesphi295 degrees as the 68.3% confidence interval for the phi2 solution consistent with the standard model (SM). A large SM-disfavored region also remains.

Published
2007

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

Author

N. Gabyshev, K. Abe, I. Adachi, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, A. M. Bakich, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, Y. Enari, S. Fratina, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, T. Hara, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Krokovny, S. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, T. Lesiak, S.-W. Lin, F. Mandl, T. Matsumoto, Y. Mikami, W. Mitaroff, H. Miyake, H. Miyata, R. Mizuk, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, H. Palka, C. W. Park, H. Park, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, M. Rozanska, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, A. J. Schwartz, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, V. Sidorov, J. B. Singh, A. Somov, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, M.-Z. Wang, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, Heyoung Yang, C. C. Zhang, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Particle physics, Branching fraction, General Physics and Astronomy, Two-body problem, law.invention, Charmed baryons, Nuclear physics, Particle decay, KEKB, law, Collider, Low Mass, P system
Abstract

Using a sample of 152×106 BB pairs accumulated with the Belle detector at the KEKB e+e- collider, we study the decay mechanism of three-body charmed decay B-→Λc+pπ-. The intermediate two-body decay B-→Σc(2455)0p is observed for the first time with a branching fraction of (3.7±0.7±0.4±1.0)×10-5 and a statistical significance of 8.4σ. We also observe a low-mass enhancement in the (Λc+p) system, which can be parametrized as a Breit-Wigner function with a mass of (3.35-0.02+0.01±0.02)GeV/c2 and a width of (0.07-0.03+0.04±0.04)GeV/c2. We measure its branching fraction to be (3.9-0.7+0.8±0.4±1.0)×10-5 with a statistical significance of 6.2σ. The errors are statistical, systematic, and that of the Λc+→pK-π+ decay branching fraction. © 2006 The American Physical Society.

Published
2006
Full Text
View/download PDF

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

Author

O, Tajima, H, Hayashii, M, Hazumi, K, Inami, Y, Iwasaki, S, Uehara, K, Abe, I, Adachi, H, Aihara, D, Anipko, V, Aulchenko, A M, Bakich, E, Barberio, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, M-C, Chang, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, S, Cole, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, S, Fratina, N, Gabyshev, T, Gershon, A, Go, G, Gokhroo, H, Ha, J, Haba, K, Hayasaka, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, J H, Kang, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, S K, Kim, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, J, Lee, M J, Lee, T, Lesiak, A, Limosani, S-W, Lin, D, Liventsev, G, Majumder, F, Mandl, T, Matsumoto, S, McOnie, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, T, Mori, J, Mueller, I, Nakamura, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Park, R, Pestotnik, L E, Piilonen, H, Sahoo, Y, Sakai, N, Satoyama, T, Schietinger, O, Schneider, J, Schümann, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, J B, Singh, A, Sokolov, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, K, Sumisawa, T, Sumiyoshi, S, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, T, Uglov, S, Uno, P, Urquijo, Y, Ushiroda, Y, Usov, G, Varner, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, R, Wedd, J, Wicht, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, Z P, Zhang, V, Zhilich, and A, Zupanc

Abstract

We report results of a search for the invisible decay of the Upsilon(1S) via the Upsilon(3S)--pi+ pi- Upsilon(1S) transition using a data sample of 2.9 fb-1 at the Upsilon(3S) resonance. The data were collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No signal is found, and an upper limit for the branching fraction at the 90% confidence level is determined to be B(Upsilon(1S)--invisible)2.5 x 10(-3).

Published
2006

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

Author

N. Gabyshev, K. Abe, I. Adachi, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, W. Bartel, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, K. Ikado, A. Imoto, K. Inami, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, T. Kawasaki, H. R. Khan, H. Kichimi, S. M. Kim, S. Korpar, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, T. Lesiak, S.-W. Lin, D. Liventsev, G. Majumder, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, H. Palka, C. W. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, M. Yamauchi, J. Ying, and Z. P. Zhang

Subjects
Baryon, Physics, Particle physics, KEKB, Branching fraction, General Physics and Astronomy, Resonance, Lambda
Abstract

We report the first measurements of the doubly charmed baryonic $B$ decays $B\ensuremath{\rightarrow}{\ensuremath{\Lambda}}_{c}^{+}{\ensuremath{\Lambda}}_{c}^{\ensuremath{-}}K$. The ${B}^{+}\ensuremath{\rightarrow}{\ensuremath{\Lambda}}_{c}^{+}{\ensuremath{\Lambda}}_{c}^{\ensuremath{-}}{K}^{+}$ decay is observed with a branching fraction of $({6.5}_{\ensuremath{-}0.9}^{+1.0}\ifmmode\pm\else\textpm\fi{}1.1\ifmmode\pm\else\textpm\fi{}3.4)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ and a statistical significance of $15.4\ensuremath{\sigma}$. The ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\Lambda}}_{c}^{+}{\ensuremath{\Lambda}}_{c}^{\ensuremath{-}}{K}^{0}$ decay is observed with a branching fraction of $({7.9}_{\ensuremath{-}2.3}^{+2.9}\ifmmode\pm\else\textpm\fi{}1.2\ifmmode\pm\else\textpm\fi{}4.1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ and a statistical significance of $6.6\ensuremath{\sigma}$. The branching fraction errors are statistical, systematic, and the error resulting from the uncertainty of the ${\ensuremath{\Lambda}}_{c}^{+}\ensuremath{\rightarrow}p{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decay branching fraction. The analysis is based on $357\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data accumulated at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider.

Published
2006
Full Text
View/download PDF

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

Author

S. Nishida, A. Ishikawa, A. Bay, I. Adachi, A. Chuvikov, F. Takasaki, P. Križan, T. E. Browder, O. Nitoh, M. Z. Wang, S. Eidelman, S. Ogawa, M. Shapkin, T. Iijima, Hiroaki Aihara, G. N. Taylor, S. U. Kataoka, G. Leder, Y. J. Kim, H. Ozaki, M. Danilov, M. Iwasaki, C. C. Kuo, A. Somov, R. Mizuk, Y. Iwasaki, Y. Choi, T. Sumiyoshi, Y. Yamashita, V.A. Sidorov, W. T. Chen, Y. J. Kwon, F. Mandl, P. Pakhlov, P. Krokovny, H. Kawai, H. Stoeck, Masashi Hazumi, W. A. Mitaroff, Zhenyu Zhang, Y. Onuki, A.S. Kuzmin, H. Miyake, S. Blyth, M. E. Sevior, O. Schneider, R. Seidl, Young-Il Choi, R. Pestotnik, J. S. H. Lee, H. Park, A. Bozek, K. Miyabayashi, D. Liventsev, N. Soni, C. C. Wang, J. Haba, Ho Kim, H. Hayashii, Y.-J. Lee, T. Uglov, Rakesh Kumar, Takehiko Mori, A. Go, Gobinda Majumder, Kazuo Abe, E. Nakano, K. S. Park, T. J. Gershon, I. Bizjak, H. Palka, A. Bondar, U. Bitenc, S. Okuno, L. E. Piilonen, T. Schietinger, G. S. Varner, X. C. Tian, T. Tsukamoto, Vladislav Balagura, S. L. Olsen, T. Aushev, S. Cole, R. Kulasiri, K. Belous, J. H. Kang, A. Matyja, Andrej Gorišek, G. Gokhroo, K. Inami, A. Yamaguchi, D. Heffernan, S. W. Lin, S. Uehara, E. Won, R. Itoh, A. J. Schwartz, H. J. Kim, H. Miyata, Y. Teramoto, Bruce Yabsley, H. Ha, N. Katayama, K. Ueno, S. Bahinipati, T. Okabe, Yu. V. Usov, C.-H. Wu, M. H. Tanaka, H. Shibuya, K. Hayasaka, J. Dalseno, Y. Miyazaki, Y. Watanabe, Byung Gu Cheon, H. Kichimi, T. Hokuue, A. Chen, T. Tsuboyama, A. Sokolov, T. Lesiak, Phillip Urquijo, Y. Chao, H. R. Khan, M. Starič, Y. B. Hsiung, C. H. Wang, T. Kawasaki, M. Nakao, M. Dash, S. McOnie, W. S. Hou, Samo Stanič, S. Uno, Long Zhang, T. Matsumoto, A. M. Bakich, Z. Natkaniec, T. Ohshima, N. Gabyshev, V. M. Aulchenko, Y. Sakai, and S. R. Hou

Subjects
Physics, Baryon, Particle physics, KEKB, Branching fraction, General Physics and Astronomy, Resonance, B meson
Abstract

We study the baryonic charmonium decays of B mesons B+-->etacK+ and B+-->J/psiK+, where the etac and J/psi subsequently decay into a pp[over] or LambdaLambda[over] pair. We measure the J/psi-->pp[over] and LambdaLambda[over] anisotropy parameters alphaB=-0.60+/-0.13+/-0.14 (pp[over]), -0.44+/-0.51+/-0.31 (LambdaLambda[over ]) and compare to results from e;{+}e;{-}-->J/psi formation experiments. We also report the first observation of etac-->LambdaLambda[over]. The measured branching fraction is B(etac-->LambdaLambda[over ])=(0.87(+0.24)/(-0.21)(stat)(+0.09/-0.14) (syst)+/-0.27(PDG))x10-3. This study is based on a 357 fb-1 data sample recorded on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.

Published
2006
Full Text
View/download PDF

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

Author

I. Adachi, M. H. Tanaka, S. Villa, Y. Yamashita, Y. Iwasaki, Y. J. Kwon, Masashi Hazumi, I. Bedny, T. E. Browder, A. Sokolov, T. Iijima, J. S. H. Lee, O. Schneider, T. Aushev, T. Nagamine, Zhenyu Zhang, M. Danilov, J. H. Kang, A. Chen, K. F. Chen, C. C. Kuo, A. Chuvikov, S. Cole, H. Ozaki, M. Nakao, O. Nitoh, V.A. Sidorov, Samo Stanič, W. A. Mitaroff, T. Kawasaki, S. Uehara, A. Drutskoy, A. Garmash, Y. B. Hsiung, H. Ha, S. McOnie, N. Katayama, Ho Kim, S. Nishida, I. Tikhomirov, R. Pestotnik, T. Uglov, R. Mizuk, M. Iwasaki, Hiroaki Aihara, Young-Il Choi, J. Dalseno, K. Miyabayashi, D. Anipko, H. Miyake, W. T. Chen, D. Liventsev, J. Dragic, T. J. Gershon, I. Bizjak, G. S. Varner, C. C. Wang, A. Imoto, A. M. Bakich, R. Itoh, P. Pakhlov, N. Tamura, H. Stoeck, C. H. Wang, Q. L. Xie, T. Ohshima, Y. Miyazaki, E. Nakano, S. Blyth, A. Bondar, K. Belous, S. Korpar, Jolanta Brodzicka, G. R. Moloney, P. Krokovny, N. Gabyshev, T. Sumiyoshi, H. Park, A. Bozek, Kazuo Abe, T. Hara, S. Okuno, M. Starič, A. Matyja, H. Miyata, W. S. Hou, Y. Hoshi, G. Leder, Y. Sakai, T. Hokuue, Andrej Gorišek, A. Yamaguchi, A. Ishikawa, A. Somov, H. Palka, T. Tsukamoto, A. Bay, K. Hayasaka, Jasvinder A. Singh, S. W. Lin, L. E. Piilonen, T. Schietinger, Long Zhang, G. Pakhlova, T. Nozaki, F. Takasaki, H. Shibuya, D. Epifanov, S. Eidelman, P. Križan, Y. Teramoto, G. Gokhroo, Bruce Yabsley, T. Okabe, A. J. Schwartz, H. J. Kim, Y. Choi, Y. Chao, M. Bračko, F. Mandl, H. Kawai, M. Dash, Y. Onuki, H. R. Khan, R. Chistov, A.S. Kuzmin, B. Golob, Byung Gu Cheon, R. Seidl, K. S. Park, M. Shapkin, S. R. Hou, T. Matsumoto, S. Ogawa, N. Soni, Rakesh Kumar, Vladislav Balagura, S. L. Olsen, M. E. Sevior, E. Won, Daniel Robert Marlow, U. Bitenc, S. Uno, Yu. V. Usov, M. C. Chang, M. Yamauchi, S. Suzuki, K. Ueno, C.-H. Wu, Y. Watanabe, H. Kichimi, T. Tsuboyama, T. Lesiak, X. C. Tian, H. Hayashii, J. Haba, D. Heffernan, M. Z. Wang, K. Kinoshita, G. N. Taylor, A. Go, K. Inami, V. M. Aulchenko, E. L. Barberio, and B. Shwartz

Subjects
Physics, Particle physics, Web of science, 010308 nuclear & particles physics, Electron–positron annihilation, media_common.quotation_subject, Hyperon, General Physics and Astronomy, 01 natural sciences, Asymmetry, Resonance (particle physics), Charmed baryons, Nuclear physics, Particle decay, Isospin, 0103 physical sciences, 010306 general physics, media_common
Abstract

Reference EPFL-ARTICLE-154577doi:10.1103/PhysRevLett.97.162001View record in Web of Science Record created on 2010-11-05, modified on 2017-05-12

Published
2006
Full Text
View/download PDF

23. Measurement of inclusive Ds, D0, and J/psi rates and determination of the Bs(*)Bs(*) production fraction in bb Events at the Upsilon(5S) resonance

Author

A, Drutskoy, K, Abe, I, Adachi, H, Aihara, D, Anipko, K, Arinstein, V, Aulchenko, T, Aushev, S, Banerjee, E, Barberio, M, Barbero, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, P, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, T, Gershon, A, Go, G, Gokhroo, P, Goldenzweig, B, Golob, H, Ha, J, Haba, T, Hara, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Higuchi, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, S K, Kim, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, J, Lee, M J, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, D, Liventsev, J, Macnaughton, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, S, McOnie, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, G R, Moloney, T, Nagamine, Y, Nagasaka, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, Y, Onuki, P, Pakhlov, G, Pakhlova, H, Park, K S, Park, R, Pestotnik, L E, Piilonen, A, Poluektov, Y, Sakai, N, Satoyama, T, Schietinger, O, Schneider, C, Schwanda, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, A, Sokolov, A, Somov, S, Stanic, M, Staric, H, Stoeck, K, Sumisawa, T, Sumiyoshi, S, Suzuki, S Y, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, K, Trabelsi, T, 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, J, Wiechczynski, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, Y, Yusa, L M, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc

Abstract

The inclusive production of D(s), D(0), and J/psi mesons is studied using a 1.86 fb(-1) data sample collected on the Upsilon(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The number of bb events in this Upsilon(5S) data sample is determined. We measure the branching fractions B(Upsilon(5S)--D(s)X)/2=(23.6+/-1.2+/-3.6)%, B(Upsilon(5S)--D(0)X)/2=(53.8+/-2.0+/-3.4)%, and B(Upsilon(5S)--J/psiX)/2=(1.030+/-0.080+/-0.067)%. From the D(s) and D(0) inclusive branching fractions the ratio f(s)=(18.0+/-1.3+/-3.2)% of B(s)(*)B(s)(*) to the total bb quark pair production at the Upsilon(5S) energy is obtained in a model-dependent way.

Published
2006

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

Author

K-F, Chen, K, Hara, M, Hazumi, T, Higuchi, K, Miyabayashi, Y, Nakahama, K, Sumisawa, O, Tajima, Y, Ushiroda, Y, Yusa, K, Abe, I, Adachi, H, Aihara, D, Anipko, K, Arinstein, V, Aulchenko, T, Aushev, T, Aziz, A M, Bakich, V, Balagura, S, Banerjee, E, Barberio, M, Barbero, A, Bay, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, P, Chang, Y, Chao, A, Chen, W T, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, A, Garmash, T, Gershon, A, Go, G, Gokhroo, P, Goldenzweig, B, Golob, H, Ha, J, Haba, T, Hara, K, Hayasaka, H, Hayashii, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kakuno, J H, Kang, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, S K, Kim, Y J, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kusaka, A, Kuzmin, Y-J, Kwon, G, Leder, J, Lee, M J, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, Y, Liu, D, Liventsev, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, D, Mohapatra, G R, Moloney, A, Murakami, T, Nagamine, Y, Nagasaka, I, Nakamura, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, Y, Onuki, W, Ostrowicz, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Palka, H, Park, R, Pestotnik, L E, Piilonen, H, Sahoo, Y, Sakai, N, Satoyama, T, Schietinger, O, Schneider, J, Schümann, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, J B, Singh, A, Sokolov, A, Somov, S, Stanic, M, Staric, H, Stoeck, T, Sumiyoshi, S, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Unno, S, Uno, P, Urquijo, Y, Usov, G, Varner, K E, Varvell, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, R, Wedd, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, C C, Zhang, Z P, Zhang, V, Zhilich, and A, Zupanc

Abstract

We present improved measurements of CP-violation parameters in B(0) --phiK(0), eta(')K(0), KS(0)KS(0)KS(0) decays based on a sample of 535 x 10(6) BB pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We obtain sin2phi1(eff)=+0.64+/-0.10(stat)+/-0.04(syst) for B(0) --eta(')K(0), +0.50+/-0.21(stat)+/-0.06(syst) for B(0) --phiK(0), and +0.30+/-0.32(stat)+/-0.08(syst) for B(0) --KS(0)KS(0)KS(0) decays. We have observed CP violation in the B(0) --eta(')K(0) decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B(0) --J/psiK(0) decays and obtain sin2phi1=+0.642+/-0.031(stat)+/-0.017(syst).

Published
2006

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

Author

L. Widhalm, K. Abe, I. Adachi, H. Aihara, K. Arinstein, Y. Asano, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kakuno, J. H. Kang, P. Kapusta, S. U. Kataoka, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, H. O. Kim, K. Kinoshita, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y.-J. Kwon, J. S. Lange, G. Leder, J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, H. Miyata, Y. Miyazaki, D. Mohapatra, I. Nakamura, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, P. Pakhlov, C. W. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, A. Somov, R. Stamen, S. Stanič, M. Starič, H. Stoeck, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, L. M. Zhang, Z. P. Zhang, and D. Zürcher

Subjects
Physics, Particle decay, Particle physics, Crystallography, KEKB, Meson, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, Branching (polymer chemistry), Reconstruction method
Abstract

Using a 282 fb{sup -1} data sample collected by the Belle experiment at the KEKB e{sup +}e{sup -} collider, we study D{sup 0} decays to K{sup -}l{sup +}{nu} and {pi}{sup -}l{sup +}{nu} final states. The D{sup 0} flavor and momentum are tagged through a full reconstruction of the recoiling charm meson and additional mesons from fragmentation. The reconstruction method provides very good resolution in neutrino momentum and in q{sup 2}=(p{sub l}+p{sub {nu}}){sup 2}. Normalizing to the total number of D{sup 0} tags, we measure the absolute branching fractions to be B(D{sup 0}{yields}Kl{nu})=(3.45{+-}0.07{sub stat}{+-}0.20{sub syst})% and B(D{sup 0}{yields}{pi}l{nu})=(0.255{+-}0.019{sub stat}{+-}0.016{sub syst})% and the semileptonic form factors (within the modified pole model) f{sub +}{sup K}(0)=0.695{+-}0.007{sub stat}{+-}0.022{sub syst} and f{sub +}{sup {pi}}(0)=0.624{+-}0.020{sub stat}{+-}0.030{sub syst}.

Published
2006
Full Text
View/download PDF

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

Author

A. Garmash, K. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, M. Barbero, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, H. C. Ha, T. Hara, Y. Hasegawa, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, T. Nagamine, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, C. W. Park, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, M. Rozanska, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, R. Seidl, M. E. Sevior, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, M. Yamauchi, Heyoung Yang, L. M. Zhang, Z. P. Zhang, V. Zhilich, and D. Zürcher

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, General Physics and Astronomy, Resonance, Dalitz plot, 01 natural sciences, Particle decay, KEKB, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, CP violation, 010306 general physics
Abstract

We report results on a Dalitz analysis of three-body charmless B{sup {+-}}{yields}K{sup {+-}}{pi}{sup {+-}}{pi}{sup {+-}} decay including searches for direct CP violation. We report the first observation of the decay B{sup {+-}}{yields}f{sub 2}(1270)K{sup {+-}} with a statistical significance above 6{sigma}. We also observe first evidence for large direct CP violation in the B{sup {+-}}{yields}{rho}(770){sup 0}K{sup {+-}} channel. The results are obtained with a data sample that contains 386x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider.

Published
2006
Full Text
View/download PDF

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

Author

Y. Chao, H. R. Khan, T. E. Browder, M. Yamauchi, C. C. Wang, Y. Iwasaki, Y. J. Kwon, Kazuo Abe, T. Hara, R. Mizuk, K. Senyo, Y. Asano, S. Okuno, M. Danilov, C. C. Kuo, L. Hinz, T. Kawasaki, Andrej Gorišek, Osamu Tajima, Y. Sakai, Jie Zhang, E. Nakano, S. Nishida, D. Anipko, D. Liventsev, I. Bizjak, G. S. Varner, O. Nitoh, M. Starič, O. Schneider, W. A. Mitaroff, S. U. Kataoka, Y. Ushiroda, Young-Il Choi, S. R. Hou, A. Yamaguchi, Seong Keun Kim, R. Itoh, Yu. V. Usov, Y. Teramoto, Bruce Yabsley, K. Miyabayashi, T. Okabe, A. M. Bakich, Z. Natkaniec, X. C. Tian, Noriaki K. Sato, M. Rozanska, Masashi Tanaka, Zhenyu Zhang, G. Gokhroo, A. J. Schwartz, S. W. Lin, U. Bitenc, Hiroaki Aihara, A. Drutskoy, N. Gabyshev, L. E. Piilonen, E. Won, K. Sumisawa, Rainer Stamen, Y. B. Hsiung, A. Chuvikov, T. J. Gershon, J. Haba, K. Ikado, T. Schietinger, H. Miyata, Y. Hoshi, S. Blyth, S. M. Kim, P. Chang, Masashi Hazumi, Hirokazu Ishino, A. Bozek, J. Ying, K. Hayasaka, Phillip Urquijo, H. Kawai, J. S. H. Lee, Y. Miyazaki, Y. Onuki, R. Kulasiri, Q. L. Xie, A. Somov, T. Hokuue, Samo Korpar, Marco Barbero, W. S. Hou, Y. Yusa, Samo Stanič, J. H. Kang, Long Zhang, A. Chen, M. Dash, M. Iwasaki, J. Dalseno, B. Golob, Y. Watanabe, H. Kichimi, M. Bračko, T. Lesiak, J. Li, A. Ishikawa, F. Mandl, K. Tamai, S. E. Lee, T. Nozaki, M. E. Sevior, F. Takasaki, C. W. Park, P. Križan, M. Shapkin, A. Bondar, H. Ozaki, R. Pestotnik, S. Eidelman, G. R. Moloney, Y. Choi, R. Seidl, N. Soni, Rakesh Kumar, Takayoshi Ohshima, A. Matyja, K. Inami, M. Z. Wang, K. Kinoshita, G. N. Taylor, N. Satoyama, H. Hayashii, M. Nakao, S. McOnie, S. Uno, C. Schwanda, Vladislav Balagura, S. Fratina, S. L. Olsen, T. Matsumoto, S. Suzuki, N. Tamura, H. Stoeck, S. Uehara, H. Ha, N. Katayama, K. Trabelsi, T. Aushev, Gobinda Majumder, Antonio Limosani, H. Miyake, T. Tsukamoto, H. Shibuya, Toru Iijima, Byung Gu Cheon, I. Adachi, S. Villa, C. H. Wang, Y. Yamashita, and T. Nagamine

Subjects
Physics, Particle physics, Muon, Electron–positron annihilation, media_common.quotation_subject, General Physics and Astronomy, Resonance, Asymmetry, Particle decay, KEKB, Pair production, High Energy Physics::Experiment, B meson, media_common
Abstract

We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients A{sub 9}/A{sub 7} and A{sub 10}/A{sub 7} in B{yields}K{sup *}l{sup +}l{sup -}, where l represents an electron or a muon. We find evidence for the forward-backward asymmetry with a significance of 3.4{sigma}. The results are obtained from a data sample containing 386x10{sup 6} BB pairs that were collected on the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider.

Published
2006
Full Text
View/download PDF

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

Author

R, Chistov, K, Abe, I, Adachi, H, Aihara, D, Anipko, V, Aulchenko, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, A, Bay, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, M-C, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, D, Epifanov, N, Gabyshev, A, Garmash, T, Gershon, A, Go, G, Gokhroo, B, Golob, A, Gorisek, H, Ha, J, Haba, T, Hara, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, H O, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, G, Leder, J, Lee, T, Lesiak, S-W, Lin, D, Liventsev, F, Mandl, D, Marlow, T, Matsumoto, A, Matyja, S, McOnie, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, G R, Moloney, T, Nagamine, E, Nakano, M, Nakao, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, P, Pakhlov, G, Pakhlova, H, Palka, H, Park, K S, Park, R, Pestotnik, L E, Piilonen, Y, Sakai, T, Schietinger, O, Schneider, A J, Schwartz, R, Seidl, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, A, Sokolov, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, T, Sumiyoshi, S, Suzuki, F, Takasaki, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, I, Tikhomirov, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, Y, Usov, G, Varner, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, E, Won, C-H, Wu, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, L M, Zhang, and Z P, Zhang

Abstract

We report the first observation of two charmed strange baryons that decay into Lambda(c)(+)Kappa(-)pi(+). The broader of the two states is measured to have a mass of 2978.5+/-2.1+/-2.0 MeV/c2 and a width of 43.5+/-7.5+/-7.0 MeV/c2. The mass and width of the narrow state are measured to be 3076.7+/-0.9+/-0.5 MeV/c;{2} and 6.2+/-1.2+/-0.8 MeV/c2, respectively. We also perform a search for the isospin partner states that decay into Lambda(c)(+)Kappa(0)/(s)pi(-) and observe a significant signal at the mass of 3082.8+/-1.8+/-1.5 MeV/c2. The data used for this analysis were accumulated at or near the Upsilon(4S) resonance, using the Belle detector at the e+ e- asymmetric-energy collider KEKB. The integrated luminosity of the data sample used is 461.5 fb(-1).

Published
2006

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

Author

O. Nitoh, P. Pakhlov, Kazuo Abe, K. Sumisawa, Y. Asano, P. Kapusta, W. Bartel, S. Okuno, Hiroaki Aihara, A. Ogawa, E. Nakano, M. Bračko, Andrej Gorišek, N. Satoyama, H. Shibuya, H. Hayashii, C. H. Wang, M. Nakao, M. Iwasaki, Masashi Hazumi, H. Park, A. Bozek, Rainer Stamen, M. Grosse Perdekamp, Y. Yamashita, A. Yamaguchi, S. W. Lin, Y. Teramoto, T. Aushev, Bruce Yabsley, J. S. H. Lee, I. Nakamura, T. Okabe, T. Uglov, S. Uehara, F. Mandl, S. Nishida, H. Ha, Antonio Limosani, N. Katayama, K. Tamai, Samo Stanič, M. E. Sevior, D. Anipko, G. N. Taylor, J. S. Lange, L. S. Peak, T. Iijima, A. M. Bakich, Z. Natkaniec, T. Ohshima, A. Go, I. Adachi, Seong Keun Kim, S. Ogawa, N. Gabyshev, Y. Sakai, H. Miyata, Y. Hoshi, K. Senyo, Vladislav Balagura, W. S. Hou, S. L. Olsen, K. Inami, S. Villa, Y. Watanabe, P. Chang, T. E. Browder, T. Kawasaki, H. Kichimi, K. Hasuko, Y. Yusa, J. Schümann, K. Hayasaka, Noriaki K. Sato, S. R. Hou, T. Tsukamoto, Long Zhang, A. Matyja, N. Parslow, M. Danilov, T. Lesiak, D. Liventsev, Q. L. Xie, A. Chuvikov, C. C. Kuo, U. Bitenc, H. Miyake, Phillip Urquijo, J. Ying, H. Palka, L. E. Piilonen, I. Bizjak, M. Dash, Byung Gu Cheon, D. Zürcher, T. Schietinger, R. Kulasiri, G. S. Varner, R. Mizuk, B. Golob, Y. Iwasaki, M. Yamauchi, Y. J. Kwon, R. Itoh, Yu. V. Usov, J. Dragic, H. Kawai, S. Uno, O. Schneider, H. R. Khan, E. L. Barberio, Zhenyu Zhang, Y. Miyazaki, C. C. Wang, X. C. Tian, E. Won, T. Hokuue, S. Eidelman, S. Fratina, T. Matsumoto, N. Soni, T. J. Gershon, Takehiko Mori, R. Seidl, A. Somov, Rakesh Kumar, Y. Choi, A.S. Kuzmin, S. Blyth, S. M. Kim, J. H. Kang, J. Dalseno, A. Ishikawa, A. Bay, F. Takasaki, C. W. Park, J. Li, M. Shapkin, H. Ozaki, V.N. Zhilich, R. Pestotnik, W. A. Mitaroff, Young-Il Choi, Masashi Tanaka, A. Chen, G. Gokhroo, and M. Starič

Subjects
Quark, Physics, Annihilation, 010308 nuclear & particles physics, Electron–positron annihilation, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, 01 natural sciences, Nuclear physics, Baryon, Pair production, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Spin-½
Abstract

The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e(+)e(-) annihilation at a center-of-mass energy of 10.52 GeV, which can be attributed to a transverse polarization of the primordial quarks. The measurement was performed using a sample of 79 x 10(6) hadronic events collected with the Belle detector.

Published
2006
Full Text
View/download PDF

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

Author

C-H, Wu, M-Z, Wang, K, Abe, I, Adachi, H, Aihara, V, Aulchenko, T, Aushev, S, Bahinipati, A M, Bakich, V, Balagura, A, Bay, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, T E, Browder, Y, Chao, A, Chen, W T, Chen, B G, Cheon, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, S, Eidelman, N, Gabyshev, T, Gershon, A, Go, G, Gokhroo, A, Gorisek, H, Ha, J, Haba, K, Hayasaka, H, Hayashii, M, Hazumi, D, Heffernan, T, Hokuue, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, H O, Kim, Y J, Kim, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, G, Leder, J, Lee, Y-J, Lee, T, Lesiak, S-W, Lin, D, Liventsev, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, S, McOnie, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, T, Mori, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, P, Pakhlov, H, Palka, H, Park, K S, Park, R, Pestotnik, L E, Piilonen, Y, Sakai, T, Schietinger, O, Schneider, A J, Schwartz, R, Seidl, M E, Sevior, M, Shapkin, H, Shibuya, V, Sidorov, A, Sokolov, A, Somov, N, Soni, S, Stanic, M, Staric, H, Stoeck, T, Sumiyoshi, F, Takasaki, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, Y, Usov, G, Varner, C C, Wang, C H, Wang, Y, Watanabe, E, Won, B D, Yabsley, A, Yamaguchi, Y, Yamashita, L M, Zhang, and Z P, Zhang

Abstract

We study the baryonic charmonium decays of B mesons B+--etacK+ and B+--J/psiK+, where the etac and J/psi subsequently decay into a pp[over] or LambdaLambda[over] pair. We measure the J/psi--pp[over] and LambdaLambda[over] anisotropy parameters alphaB=-0.60+/-0.13+/-0.14 (pp[over]), -0.44+/-0.51+/-0.31 (LambdaLambda[over ]) and compare to results from e;{+}e;{-}--J/psi formation experiments. We also report the first observation of etac--LambdaLambda[over]. The measured branching fraction is B(etac--LambdaLambda[over ])=(0.87(+0.24)/(-0.21)(stat)(+0.09/-0.14) (syst)+/-0.27(PDG))x10-3. This study is based on a 357 fb-1 data sample recorded on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.

Published
2006

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

Author

D. Mohapatra, M. Nakao, S. Nishida, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, M. Barbero, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, H. C. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, S. U. Kataoka, N. Katayama, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, H. O. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, J. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, E. Nakano, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, F. J. Ronga, M. Rozanska, Y. Sakai, T. R. Sarangi, N. Sato, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, R. Seidl, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, J. Wicht, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, and D. Zürcher

Subjects
Physics, Particle physics, Neutral current, Meson, 010308 nuclear & particles physics, Branching fraction, Hadron, General Physics and Astronomy, 01 natural sciences, KEKB, Isospin, 0103 physical sciences, CP violation, B meson, Atomic physics, 010306 general physics
Abstract

We report the observation of the flavor-changing neutral current process b→dγ using a sample of 386×106 B meson pairs accumulated by the Belle detector at the KEKB e+e- collider. We measure branching fractions for the exclusive modes B-→ρ-γ, B0→ρ0γ, and B0→ωγ. Assuming that these three modes are related by isospin, we find B(B→(ρ,ω)γ)=(1.32-0.31+0.34(stat)-0.09+0.10(syst)) ×10-6 with a significance of 5.1σ. This result is used to determine the ratio of Cabibbo-Kobayashi-Maskawa matrix elements |Vtd/Vts| to be 0.199-0.025+0.026(exp)-0.015+0.018(theor). © 2006 The American Physical Society.

Published
2006
Full Text
View/download PDF

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

Author

L, Widhalm, K, Abe, I, Adachi, H, Aihara, K, Arinstein, Y, Asano, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, M, Barbero, A, Bay, I, Bedny, K, Belous, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, T E, Browder, P, Chang, A, Chen, W T, Chen, Y, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, N, Gabyshev, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, A, Gorisek, H, Ha, J, Haba, T, Hara, K, Hayasaka, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, H, Kakuno, J H, Kang, P, Kapusta, S U, Kataoka, H, Kawai, T, Kawasaki, H R, Khan, H J, Kim, H O, Kim, K, Kinoshita, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, Y-J, Kwon, J S, Lange, G, Leder, J, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, G, Majumder, F, Mandl, T, Matsumoto, A, Matyja, S, McOnie, W, Mitaroff, H, Miyata, Y, Miyazaki, D, Mohapatra, I, Nakamura, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, P, Pakhlov, C W, Park, L S, Peak, R, Pestotnik, L E, Piilonen, Y, Sakai, N, Sato, N, Satoyama, K, Sayeed, T, Schietinger, O, Schneider, C, Schwanda, A J, Schwartz, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, A, Somov, R, Stamen, S, Stanic, M, Staric, H, Stoeck, S Y, Suzuki, F, Takasaki, K, Tamai, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Unno, S, Uno, P, Urquijo, Y, Usov, G, Varner, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, L M, Zhang, Z P, Zhang, and D, Zürcher

Abstract

Using a 282 fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider, we study D0 decays to K-l+nu and pi-l+nu final states. The D0 flavor and momentum are tagged through a full reconstruction of the recoiling charm meson and additional mesons from fragmentation. The reconstruction method provides very good resolution in neutrino momentum and in q2=(pl+pnu)2. Normalizing to the total number of D0 tags, we measure the absolute branching fractions to be B(D0--Klnu)=(3.45+/-0.07stat+/-0.20syst)% and B(D0--pilnu)=(0.255+/-0.019stat+/-0.016syst)% and the semileptonic form factors (within the modified pole model) f+K(0)=0.695+/-0.007stat+/-0.022syst and f+pi(0)=0.624+/-0.020stat+/-0.030syst.

Published
2006

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

Author

J, Schümann, C H, Wang, K, Abe, I, Adachi, H, Aihara, D, Anipko, K, Arinstein, Y, Asano, T, Aushev, A M, Bakich, V, Balagura, E, Barberio, M, Barbero, A, Bay, I, Bedny, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, T E, Browder, M-C, Chang, P, Chang, Y, Chao, A, Chen, W T, Chen, B G, Cheon, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, T, Gershon, A, Go, G, Gokhroo, B, Golob, A, Gorisek, H C, Ha, J, Haba, T, Hara, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, L, Hinz, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, P, Kapusta, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, S K, Kim, S M, Kim, K, Kinoshita, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, J, Lee, T, Lesiak, A, Limosani, D, Liventsev, J, MacNaughton, G, Majumder, F, Mandl, D, Marlow, T, Matsumoto, A, Matyja, W, Mitaroff, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, G R, Moloney, T, Mori, T, Nagamine, I, Nakamura, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, N, Parslow, L S, Peak, R, Pestotnik, L E, Piilonen, M, Rozanska, Y, Sakai, T R, Sarangi, N, Sato, T, Schietinger, O, Schneider, C, Schwanda, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, V, Sidorov, A, Sokolov, A, Somov, N, Soni, R, Stamen, S, Stanic, M, Staric, K, Sumisawa, S, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, Y, Usov, G, Varner, K E, Varvell, S, Villa, C C, Wang, M-Z, Wang, Y, Watanabe, E, Won, Q L, Xie, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, Y, Yusa, C C, Zhang, L M, Zhang, Z P, Zhang, V, Zhilich, and D, Zürcher

Abstract

We report evidence for the exclusive two-body charmless hadronic B meson decay B--eta'pi, and improved measurements of B--eta'K. The results are obtained from a data sample of 386x10(6) BB pairs collected at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure B(B+--eta'pi+)=[1.76(-0.62)(+0.67)(stat)(-0.14)(+0.15)(syst)]x10(-6) and B(B0--eta'pi0)=[2.79(-0.96)(+1.02)(stat)(-0.34)(+0.25)(syst)]x10(-6). We also find the ratio of B(B+--eta'K+)/B(B0--eta'K0)=1.17+/-0.08(stat)+/-0.03(syst) and measure the direct CP asymmetries for the charged modes.

Published
2006

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

Author

D, Mohapatra, M, Nakao, S, Nishida, K, Abe, I, Adachi, H, Aihara, D, Anipko, K, Arinstein, Y, Asano, V, Aulchenko, T, Aushev, S, Bahinipati, A M, Bakich, V, Balagura, M, Barbero, I, Bedny, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, T E, Browder, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, T, Gershon, G, Gokhroo, B, Golob, A, Gorisek, H C, Ha, J, Haba, T, Hara, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, L, Hinz, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Imoto, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, S U, Kataoka, N, Katayama, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, H O, Kim, S M, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, R, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, J, Lee, T, Lesiak, A, Limosani, S-W, Lin, D, Liventsev, G, Majumder, F, Mandl, D, Marlow, T, Matsumoto, A, Matyja, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, G R, Moloney, T, Mori, E, Nakano, O, Nitoh, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, N, Parslow, L S, Peak, R, Pestotnik, L E, Piilonen, A, Poluektov, F J, Ronga, M, Rozanska, Y, Sakai, T R, Sarangi, N, Sato, T, Schietinger, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, R, Seidl, M E, Sevior, M, Shapkin, H, Shibuya, B, Shwartz, V, Sidorov, A, Sokolov, A, Somov, N, Soni, R, Stamen, S, Stanic, M, Staric, T, Sumiyoshi, S, Suzuki, O, Tajima, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, K, Trabelsi, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Unno, S, Uno, P, Urquijo, Y, Usov, G, Varner, K E, Varvell, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Y, Watanabe, J, Wicht, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, Y, Yusa, L M, Zhang, Z P, Zhang, V, Zhilich, and D, Zürcher

Abstract

We report the observation of the flavor-changing neutral current process b--dgamma using a sample of 386 x 106 B meson pairs accumulated by the Belle detector at the KEKB e+e- collider. We measure branching fractions for the exclusive modes B---rho-gamma, B0rho0gamma, and B0omegagamma. Assuming that these three modes are related by isospin, we find B(B--(rho,gamma)gamma)=[Formula: See Text] with a significance of 5.1sigma. This result is used to determine the ratio of Cabibbo-Kobayashi-Maskawa matrix elements /Vtd/Vts/ to be [Formula: See Text].

Published
2006

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

Author

N, Gabyshev, K, Abe, I, Adachi, H, Aihara, Y, Asano, V, Aulchenko, T, Aushev, S, Bahinipati, A M, Bakich, V, Balagura, E, Barberio, W, Bartel, A, Bay, I, Bedny, U, Bitenc, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, A, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, J, Haba, K, Hayasaka, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, K, Ikado, A, Imoto, K, Inami, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, T, Kawasaki, H R, Khan, H, Kichimi, S M, Kim, S, Korpar, P, Krokovny, R, Kulasiri, C C, Kuo, A, Kuzmin, Y-J, Kwon, G, Leder, T, Lesiak, S-W, Lin, D, Liventsev, G, Majumder, T, Matsumoto, W, Mitaroff, K, Miyabayashi, H, Miyata, Y, Miyazaki, R, Mizuk, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, H, Ozaki, H, Palka, C W, Park, K S, Park, R, Pestotnik, L E, Piilonen, Y, Sakai, N, Sato, N, Satoyama, T, Schietinger, O, Schneider, C, Schwanda, R, Seidl, K, Senyo, M E, Sevior, M, Shapkin, H, Shibuya, A, Somov, N, Soni, R, Stamen, S, Stanic, M, Staric, T, Sumiyoshi, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, G, Varner, K E, Varvell, S, Villa, C C, Wang, C H, Wang, Y, Watanabe, E, Won, Q L, Xie, A, Yamaguchi, M, Yamauchi, J, Ying, and Z P, Zhang

Abstract

We report the first measurements of the doubly charmed baryonic B decays B --Lambda c+ Lambda c- K. The B+ --Lambda c+ Lambda c- K+ decay is observed with a branching fraction of (6.5(-0.9)(+1.0)+/-1.1+/-3.4)x10(-4) and a statistical significance of 15.4sigma. The B0 --Lambda c+ Lambda c- K0 decay is observed with a branching fraction of (7.9(-2.3)(+2.9)+/-1.2+/-4.1)x10(-4) and a statistical significance of 6.6sigma. The branching fraction errors are statistical, systematic, and the error resulting from the uncertainty of the Lambda c+ --pK- pi+ decay branching fraction. The analysis is based on 357 fb(-1) of data accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.

Published
2006

36. Evidence for large direct CP violation in B+/- --rho(770)0K+/- from analysis of three-body charmless B+/- --K+/-pi+/-pi+/- decays

Author

A, Garmash, K, Abe, I, Adachi, H, Aihara, Y, Asano, T, Aushev, T, Aziz, S, Bahinipati, A M, Bakich, M, Barbero, I, Bedny, U, Bitenc, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, P, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, A, Chuvikov, J, Dalseno, M, Danilov, M, Dash, J, Dragic, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, T, Gershon, A, Go, G, Gokhroo, B, Golob, A, Gorisek, H C, Ha, T, Hara, Y, Hasegawa, N C, Hastings, K, Hayasaka, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, P, Kapusta, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, S K, Kim, S M, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, C C, Kuo, A, Kuzmin, Y-J, Kwon, S E, Lee, T, Lesiak, A, Limosani, S-W, Lin, D, Liventsev, F, Mandl, D, Marlow, T, Matsumoto, A, Matyja, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, T, Nagamine, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, S, Noguchi, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, H, Ozaki, C W, Park, H, Park, K S, Park, L S, Peak, R, Pestotnik, L E, Piilonen, M, Rozanska, Y, Sakai, N, Satoyama, T, Schietinger, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, R, Seidl, M E, Sevior, H, Shibuya, B, Shwartz, J B, Singh, A, Somov, R, Stamen, S, Stanic, M, Staric, T, Sumiyoshi, S, Suzuki, S Y, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, X C, Tian, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, S, Uno, P, Urquijo, G, Varner, K E, Varvell, S, Villa, C H, Wang, M-Z, Wang, Y, Watanabe, E, Won, Q L, Xie, A, Yamaguchi, M, Yamauchi, Heyoung, Yang, L M, Zhang, Z P, Zhang, V, Zhilich, and D, Zürcher

Abstract

We report results on a Dalitz analysis of three-body charmless B+/- --K+/-pi+/-pi+/- decay including searches for direct CP violation. We report the first observation of the decay B+/- --f2(1270)K+/- with a statistical significance above 6sigma. We also observe first evidence for large direct CP violation in the B+/- --rho(770)0K+/- channel. The results are obtained with a data sample that contains 386 10(6) BB pairs collected at the Y(4s) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.

Published
2005

37. Determination of|Vub|from Measurements of the Inclusive Charmless Semileptonic Partial Rates ofBMesons using Full Reconstruction Tags

Author

I. Bizjak, K. Abe, H. Aihara, Y. Asano, S. Bahinipati, A. M. Bakich, Y. Ban, E. Barberio, M. Barbero, A. Bay, U. Bitenc, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, L. Y. Dong, A. Drutskoy, S. Eidelman, Y. Enari, F. Fang, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, T. Hara, 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, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, S. E. Lee, T. Lesiak, J. Li, A. Limosani, 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, R. Mizuk, T. Nagamine, Y. Nagasaka, I. Nakamura, 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, P. Pakhlov, 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, C. Schwanda, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, 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, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Heyoung Yang, L. M. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Semileptonic decay, Physics, Particle physics, 010308 nuclear & particles physics, Cabibbo–Kobayashi–Maskawa matrix, Electron–positron annihilation, Hadron, Monte Carlo method, General Physics and Astronomy, 01 natural sciences, Nuclear physics, KEKB, 0103 physical sciences, B meson, Invariant mass, 010306 general physics
Abstract

We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element data collected by the Belle detector at the KEKB e+e-asymmetric collider. Events are tagged by fully reconstructing one of the B mesons, produced in pairs from Υ(4S). The signal for b→u semileptonic decay is distinguished from the b→c background using the hadronic mass MX, the leptonic invariant mass squared q2 and the variable P+≡EX-|p→X|. The results are obtained for events with pl*≥1GeV/c, in three kinematic regions (1)MX 8GeV2/c2, and by (3)P+

Published
2005
Full Text
View/download PDF

38. Measurement of the Wrong-Sign DecaysD0→K+π−π0andD0→K+π−π+π−, and Search forCPViolation

Author

X. C. Tian, Y. Ban, K. Abe, H. Aihara, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, A. M. Bakich, 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, Y. K. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, L. Y. Dong, A. Drutskoy, S. Eidelman, Y. Enari, F. Fang, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, S. E. Lee, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, H. Palka, C. W. Park, H. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yuan, C. C. Zhang, L. M. Zhang, and Z. P. Zhang

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Cabibbo–Kobayashi–Maskawa matrix, Electron–positron annihilation, media_common.quotation_subject, General Physics and Astronomy, Resonance (chemistry), 01 natural sciences, Asymmetry, Belle experiment, Amplitude, 0103 physical sciences, CP violation, 010306 general physics, media_common, Sign (mathematics)
Abstract

Using 281fb-1 of data from the Belle experiment recorded at or near the Υ(4S) resonance, we have measured the rates of the "wrong-sign" decays D0→K+π-π0 and D0→K+π-π+π- relative to those of the Cabibbo-favored decays D0→K-π+π0 and D0→K-π+π+π-. These wrong-sign decays proceed via a doubly Cabibbo-suppressed amplitude or via D0-D0 mixing; the latter has not yet been observed. We obtain RWS(Kππ0)=[0.229±0.015(stat)-0.009+0.013(syst)]% and RWS(K3π)=[0.320±0.018(stat)-0.013+0.018(syst)]%. The CP asymmetries are measured to be -0.006±0.053 and -0.018±0.044 for the K+π-π0 and K+π-π+π- final states, respectively. © 2005 The American Physical Society.

Published
2005
Full Text
View/download PDF

39. Observation of a charmoniumlike state produced in association with a J/psi in e+e- annihilation at sqrt[s] approximately equal to 10.6 GeV

Author

K, Abe, I, Adachi, H, Aihara, K, Arinstein, Y, Asano, V, Aulchenko, T, Aushev, T, Aziz, A M, Bakich, V, Balagura, M, Barbero, I, Bedny, U, Bitenc, I, Bizjak, A, Bondar, M, Bracko, J, Brodzicka, T E, Browder, Y, Chao, A, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, D, Epifanov, S, Fratina, N, Gabyshev, T, Gershon, G, Gokhroo, B, Golob, H C, Ha, J, Haba, Y, Hasegawa, K, Hayasaka, H, Hayashii, M, Hazumi, L, Hinz, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Ishikawa, M, Iwasaki, Y, Iwasaki, P, Kapusta, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, S M, Kim, K, Kinoshita, S, Korpar, P, Krokovny, C C, Kuo, A, Kuzmin, J S, Lange, G, Leder, T, Lesiak, A, Limosani, S-W, Lin, D, Liventsev, F, Mandl, T, Matsumoto, A, Matyja, Y, Mikami, W, Mitaroff, K, Miyabayashi, H, Miyata, R, Mizuk, Y, Nagasaka, E, Nakano, M, Nakao, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, K S, Park, L S, Peak, L E, Piilonen, A, Poluektov, Y, Sakai, N, Sato, T, Schietinger, O, Schneider, A J, Schwartz, R, Seidl, K, Senyo, M E, Sevior, B, Shwartz, V, Sidorov, A, Somov, R, Stamen, M, Staric, T, Sumiyoshi, S Y, Suzuki, F, Takasaki, N, Tamura, M, Tanaka, Y, Teramoto, X C, Tian, K, Trabelsi, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Unno, S, Uno, P, Urquijo, G, Varner, K E, Varvell, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, E, Won, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, C C, Zhang, J, Zhang, L M, Zhang, Z P, Zhang, and V, Zhilich

Abstract

We report the first observation of a charmoniumlike state recoiling from the J/psi in the inclusive process e+e- --J/psi+anything at a mass of (3.943+/-0.006+/-0.006) GeV/c{2}. We also observe the decay of this state into D*D[over ] and determine its intrinsic width to be less than 52 MeV/c{2} at the 90% C.L. These results are obtained from a 357 fb{-1} data sample collected with the Belle detector near the Upsilon(4S) resonance, at the KEKB asymmetric-energy e+e- collider.

Published
2005

40. Measurements of the Branching Fraction and Polarization inB+→ρ+K*0Decays

Author

J. Zhang, K. Abe, I. Adachi, H. Aihara, K. Arinstein, Y. Asano, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, E. Barberio, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, J. Brodzicka, T. E. Browder, P. Chang, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, S. Eidelman, F. Fang, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, T. Hara, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, A. Imoto, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, J. H. Kang, J. S. Kang, S. U. Kataoka, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Krokovny, C. C. Kuo, Y.-J. Kwon, G. Leder, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, J. MacNaughton, F. Mandl, T. Matsumoto, A. Matyja, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. R. Moloney, T. Nagamine, 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, Y. Onuki, W. Ostrowicz, H. Ozaki, C. W. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sagawa, Y. Sakai, T. R. Sarangi, T. Schietinger, O. Schneider, A. J. Schwartz, M. E. Sevior, H. Shibuya, A. Somov, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, M. Tanaka, Y. Teramoto, X. C. Tian, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, Heyoung Yang, J. Ying, L. M. Zhang, Z. P. Zhang, and D. Žontar

Subjects
Physics, Particle physics, KEKB, Meson, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, High Energy Physics::Experiment, Polarization (waves), Helicity
Abstract

We present the results of a study of the charmless vector-vector decay B+ --> rho+ K*0, based on 253 fb(-1) of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. We obtain the branching fraction B(B+ --> rho+ K*0) = [8.9 +/- 1.7(stat) +/- 1.2(syst)] x 10(-6). We also perform a helicity analysis of the rho and K* vector mesons, and obtain the longitudinal polarization fraction f(L)(B+ --> rho+ K*0) = 0.43 +/- 0.11(stat)(-0.02)(+0.05) (syst).

Published
2005
Full Text
View/download PDF

41. Improved Evidence for DirectCPViolation inB0→π+π−Decays and Model-Independent Constraints onϕ2

Author

R. Mizuk, Y. Sakai, Jie Zhang, L. S. Peak, C. C. Wang, S. R. Hou, M. Rozanska, A. Kibayashi, L. Hinz, S. Nishida, Akito Kusaka, K. Inami, S. L. Olsen, H. Kakuno, Noriaki K. Sato, U. Bitenc, Frederic Jean Ronga, M. Iwasaki, H. Miyata, K. Senyo, Y. Hoshi, T. Kawasaki, W. S. Hou, J. Schümann, N. C. Hastings, Y. Yamashita, K. Arinstein, C. H. Wang, Y. Choi, Kazuo Abe, B. D. Yabsley, T. Hara, Long Zhang, Heyoung Yang, S. Noguchi, A.S. Kuzmin, Y. Asano, P. Kapusta, Y. Iwasaki, Y. J. Kwon, T. Nagamine, S. Okuno, A. Bondar, T. Hokuue, M. Yamauchi, E. L. Barberio, T. Iijima, T. E. Browder, A. Imoto, O. Schneider, H. Shibuya, V.A. Sidorov, K. Ueno, I. Bizjak, S. Korpar, Jolanta Brodzicka, L. Y. Dong, J. H. Kang, G. S. Varner, C. C. Kuo, Andrej Gorišek, I. Nakamura, Daniel Robert Marlow, T. Aushev, H. Palka, L. E. Piilonen, A. M. Bakich, Z. Natkaniec, T. Schietinger, Zhenyu Zhang, Y. B. Hsiung, R. Itoh, P. Schonmeier, J. S. Kang, K. Hara, P. Pakhlov, F. Fang, Y. Teramoto, E. Nakano, H. Hayashii, M. H. Tanaka, T. Ohshima, Y. Ushiroda, Hiroyuki Sagawa, S. K. Choi, A. Drutskoy, H. Park, A. Bozek, M. Dash, T. Okabe, A. Chuvikov, S. Cole, S. Uno, B. Golob, A. Garmash, H. Miyake, M. Z. Wang, K. Kinoshita, Y. Watanabe, A. Yamaguchi, Jasvinder A. Singh, S. W. Lin, T. J. Gershon, N. Tamura, Gobinda Majumder, Phillip Urquijo, R. Chistov, Yuji Enari, H. Kichimi, Y. Chao, S. Eidelman, J. Dalseno, J. MacNaughton, T. Tsukamoto, H. R. Khan, Hirokazu Ishino, N. Soni, D. Žontar, P. Krokovny, K. Trabelsi, S. Blyth, N. Gabyshev, T. Tsuboyama, S. Fratina, Y. Ban, A. Somov, A. Ishikawa, A. Bay, T. Sumiyoshi, B. Shwartz, S. E. Lee, T. Nozaki, T. Lesiak, Byung Gu Cheon, H. Kawai, F. Takasaki, H. Ozaki, P. Križan, Y. Onuki, N. Parslow, S. Suzuki, G. Leder, Kevin Varvell, R. Pestotnik, W. T. Chen, Yasushi Nagasaka, Y. Mikami, A. Matyja, Y. Unno, P. Chang, S. M. Kim, K. F. Chen, F. Mandl, Q. L. Xie, J. Li, K. Tamai, M. E. Sevior, D. Zürcher, S. Uehara, N. Katayama, W. Ostrowicz, A. Chen, I. Adachi, Samo Stanič, A. Murakami, S. Villa, X. C. Tian, D. Mohapatra, J. Haba, H. Nakazawa, G. Gokhroo, A. J. Schwartz, Suneel Kumar, M. Nakao, M. Bračko, V.N. Zhilich, W. A. Mitaroff, Young-Il Choi, K. Miyabayashi, M. Starič, Osamu Tajima, O. Nitoh, Hiroaki Aihara, Rainer Stamen, S. Ogawa, Masashi Hazumi, T. Uglov, Marco Barbero, K. Sumisawa, and S. Y. Suzuki

Subjects
Physics, Particle physics, Crystallography, KEKB, 010308 nuclear & particles physics, Isospin, Electron–positron annihilation, 0103 physical sciences, General Physics and Astronomy, Resonance, CP violation, 010306 general physics, 01 natural sciences
Abstract

We present a new measurement of the time-dependent CP-violating parameters in B{sup 0}{yields}{pi}{sup +}{pi}{sup -} decays with 275x10{sup 6} BB pairs collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider operating at the {upsilon}(4S) resonance. We find 666{+-}43 B{sup 0}{yields}{pi}{sup +}{pi}{sup -} events and measure the CP-violating parameters: S{sub {pi}}{sub {pi}}=-0.67{+-}0.16(stat){+-}0.06(syst) and A{sub {pi}}{sub {pi}}=+0.56{+-}0.12(stat){+-}0.06(syst). We find evidence for large direct CP violation with a significance greater than 4 standard deviations for any S{sub {pi}}{sub {pi}} value. Using isospin relations, we obtain 95.4% confidence intervals for the Cabibbo-Kobayashi-Maskawa quark-mixing matrix angle {phi}{sub 2} of 0 deg.

Published
2005
Full Text
View/download PDF

42. Studies ofCPViolation inB→J/ψK*Decays

Author

R. Itoh, Y. Onuki, K. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aushev, A. M. Bakich, Y. Ban, E. Barberio, A. Bay, 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, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Dash, L. Y. Dong, A. Drutskoy, S. Eidelman, Y. Enari, F. Fang, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, K. Hara, T. Hara, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, 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, S. M. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, S. Kumar, C. C. Kuo, A. Kusaka, A. Kuzmin, Y.-J. Kwon, G. Leder, S. E. Lee, T. Lesiak, J. Li, S.-W. Lin, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, T. Nagamine, 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, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, P. Schönmeier, J. Schümann, A. J. Schwartz, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, 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. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, Y. Watanabe, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Heyoung Yang, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, Null (mathematics), General Physics and Astronomy, 01 natural sciences, law.invention, Standard Model, Nuclear physics, KEKB, Triple product, law, 0103 physical sciences, CP violation, High Energy Physics::Experiment, B meson, 010306 general physics, Collider
Abstract

CP violation in B-->J/PsiK* decays is studied using an angular analysis in a data sample of 253 fb(-1) recorded with the Belle detector at the KEKB e(+)e(-) collider. The flavor separated measurements of the decay amplitudes indicate no evidence for direct CP violation. T-odd CP violation is studied using the asymmetries in triple product correlations, and the results are consistent with the standard model null predictions. The time-dependent angular analysis gives the following values of CP-violating parameters: sin(2phi(1) = 0.24 +/- 0.31 +/- 0.05 and cos(2phi(1)=0.56 +/- 0.79 +/- 0.11.

Published
2005
Full Text
View/download PDF

43. Measurement of Time-DependentCP-Violating Asymmetries inB0→Ks0Ks0Ks0Decay

Author

Kazuo Abe, B. D. Yabsley, T. Tsukamoto, Y. Asano, S. Okuno, Andrej Gorišek, Byung Gu Cheon, Y. Teramoto, Osamu Tajima, Akito Kusaka, S. U. Kataoka, I. Bizjak, H. Miyake, G. S. Varner, T. Okabe, W. S. Hou, S. Cole, Simon Blyth, A. Somov, Tapas Sarangi, O. Nitoh, K. Inami, R. Itoh, Kevin Varvell, J. H. Kang, Long Zhang, S. Suzuki, A. Matyja, R. Mizuk, F. Fang, G. Gokhroo, H. Aihara, Noriaki K. Sato, J. Haba, L. S. Peak, A. Garmash, S. Fratina, Z. P. Zhang, T. Matsumoto, K. F. Chen, T. Iijima, H. Miyata, W. T. Chen, Y. Hoshi, Rainer Stamen, J. Dalseno, A. Kuzmin, U. Bitenc, A. Bondar, S. Korpar, J. B. Singh, N. Tamura, M. Tanaka, Jolanta Brodzicka, M. Nakao, T. Nozaki, A. Drutskoy, S. Uehara, S. Ogawa, H. J. Kim, Ho Kim, V.A. Sidorov, M. Starič, Q. L. Xie, N. Katayama, A. Ishikawa, Rolf Seuster, T. J. Gershon, T. Sumiyoshi, X. C. Tian, D. Žontar, H. Hayashii, Daniel Robert Marlow, Jia-ju Zhang, Motoki Iwasaki, Y. Ushiroda, F. Takasaki, C. W. Park, P. Križan, Y. Chao, Hiroyuki Sagawa, I. Adachi, K. Trabelsi, Hitoshi Yamamoto, K. Ueno, T. Kawasaki, V.N. Zhilich, S. Stanič, M. Z. Wang, H. R. Khan, Y. Iwasaki, Y. J. Kwon, K. Sumisawa, N. Parslow, K. Kinoshita, L. E. Piilonen, W. A. Mitaroff, S. Villa, Phillip Urquijo, O. Schneider, S. Uno, H. Shibuya, T. Schietinger, M. Dash, R. Kulasiri, T. Aushev, Heyoung Yang, Y. B. Hsiung, J. S. Lange, K. Miyabayashi, G. Leder, Masashi Hazumi, T. Hokuue, M. Yamauchi, M. Bračko, W. Ostrowicz, M. Rozanska, F. Mandl, K. Tamai, M. E. Sevior, V. M. Aulchenko, R. Chistov, T. Uglov, A. Imoto, A. M. Bakich, Z. Natkaniec, T. Ohshima, A. Chuvikov, S. M. Kim, N. Gabyshev, B. Golob, C. C. Wang, S. K. Kim, Y. Sakai, T. Higuchi, E. Nakano, C. H. Wang, Y. Yamashita, Yuji Enari, H. Kichimi, S. R. Hou, T. Tsuboyama, T. Lesiak, T. Nagamine, A. Yamaguchi, S. W. Lin, H. Ozaki, R. Pestotnik, A. Chen, P. Krokovny, Shaji Kumar, S. L. Olsen, S. Eidelman, H. Park, A. Bozek, T. E. Browder, M. Danilov, C. C. Kuo, K. Hara, S. Nishida, J. S. Kang, Hirokazu Ishino, H. Kawai, Y. Onuki, Y. Choi, T. Hara, and Yasushi Nagasaka

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, media_common.quotation_subject, Electron–positron annihilation, General Physics and Astronomy, Resonance, 01 natural sciences, Asymmetry, law.invention, Standard Model, Nuclear physics, KEKB, law, 0103 physical sciences, CP violation, High Energy Physics::Experiment, B meson, 010306 general physics, Collider, media_common
Abstract

We present a measurement of CP-violation parameters in the B0 --> K(s)0K(s)0K(s)0 decay based on a sample of 275 x 10(6) BB pairs collected at the upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One neutral B meson is fully reconstructed in the decay B0 --> K(s)0K(s)0K(s)0, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters are obtained from the asymmetry in the distributions of the proper-time interval between the two B decays: S = +1.26 +/- 0.68(stat) +/- 0.20(syst) and [symbol: see text] = +0.54 +/- 0.34(stat) +/- 0.09(syst).

Published
2005
Full Text
View/download PDF

44. Measurements of B decays to two kaons

Author

K. Abe, I. Adachi, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, 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, S. Cole, J. Dalseno, M. Danilov, M. Dash, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, Y. Enari, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, J. H. Kim, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, S. E. Lee, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, Y. Nagasaka, E. Nakano, M. Nakao, 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, M. Rozanska, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, A. J. Schwartz, M. E. Sevior, H. Shibuya, V. Sidorov, A. Somov, N. Soni, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, G. Varner, 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
Physics, Particle physics, Tamura, Norio, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, media_common.quotation_subject, Hadron, FOS: Physical sciences, General Physics and Astronomy, 01 natural sciences, Asymmetry, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), KEKB, 0103 physical sciences, 田村, 詔生, B meson, 010306 general physics, media_common
Abstract

We report measurements of B meson decays to two kaons using 250/fb of data collected with the Belle detector at the KEKB asymmetric energy e+ e- collider. We find evidence of signals in B+ -> K0(bar) K+ and B0 -> K0 K0(bar) with significances of 3.0 sigma and 3.5 sigma, respectively. The corresponding branching fractions are measured to be BF(B+ -> K0(bar) K+) = (1.0+-0.4+-0.1) x 10^-6 and Br(B0 -> K0 K0(bar)) = 0.8+-0.3+-0.1) x 10^-6. These decay modes are examples of hadronic b -> d transitions. No signal is observed in the decay B0 -> K+ K- and we set an upper limit of 3.7 x 10^-7 at 90% confidence level., 8 pages, 1 figure, submitted to the Lepton Photon 2005 conference in Uppsala, Sweden and to the HEP2005 Europhysics Conference in Lisbon, Portugal Submitted to PRL

Published
2005

45. Evidence forB0→D+D−and Observation ofB−→D0D−andB−→D0D*−Decays

Author

G. Majumder, K. Abe, I. Adachi, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, S. Banerjee, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, Y. Enari, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. K. Kim, S. M. Kim, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, S. E. Lee, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, J. MacNaughton, F. Mandl, T. Matsumoto, A. Matyja, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, G. R. Moloney, T. Nagamine, Y. Nagasaka, I. Nakamura, 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, H. Palka, C. W. Park, H. Park, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, M. Rozanska, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, P. Schönmeier, J. Schümann, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Heyoung Yang, J. Ying, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Crystallography, Particle physics, KEKB, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, General Physics and Astronomy, B meson
Abstract

We report evidence for B{sup 0}{yields}D{sup +}D{sup -} and the first observation of the decay modes B{sup -}{yields}D{sup 0}D{sup -} and B{sup -}{yields}D{sup 0}D{sup *-} based on a sample of 152x10{sup 6} BB events collected by the Belle detector at KEKB. The branching fractions for B{sup 0}{yields}D{sup +}D{sup -}, B{sup -}{yields}D{sup 0}D{sup -}, and B{sup -}{yields}D{sup 0}D{sup *-} are found to be (1.91{+-}0.51{+-}0.30)x10{sup -4} (4.83{+-}0.78{+-}0.58)x10{sup -4}, and (4.57{+-}0.71{+-}0.56)x10{sup -4}, respectively. Charge asymmetries in the B{sup -}{yields}D{sup 0}D{sup -} and B{sup -}{yields}D{sup 0}D{sup *-} channels are consistent with zero.

Published
2005
Full Text
View/download PDF

46. Measurement of the wrong-sign decays D0 --K+ pi- pi0 and D0 --K+ pi- pi+ pi-, and search for CP violation

Author

X C, Tian, Y, Ban, K, Abe, H, Aihara, K, Arinstein, Y, Asano, V, Aulchenko, T, Aushev, A M, Bakich, S, Banerjee, E, Barberio, M, Barbero, A, Bay, I, Bedny, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, P, Chang, Y, Chao, A, Chen, K-F, Chen, W T, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, J, Dalseno, M, Danilov, M, Dash, L Y, Dong, A, Drutskoy, S, Eidelman, Y, Enari, F, Fang, S, Fratina, N, Gabyshev, T, Gershon, G, Gokhroo, B, Golob, A, Gorisek, J, Haba, T, Hara, K, Hayasaka, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, T, Iijima, K, Ikado, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, Y, Iwasaki, J H, Kang, J S, Kang, P, Kapusta, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, S K, Kim, S M, Kim, K, Kinoshita, S, Korpar, P, Krizan, 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, F, Mandl, T, Matsumoto, A, Matyja, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, Y, Miyazaki, R, Mizuk, G R, Moloney, T, Mori, T, Nagamine, Y, Nagasaka, E, Nakano, H, Nakazawa, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, H, Palka, C W, Park, H, Park, R, Pestotnik, L E, Piilonen, Y, Sakai, N, Sato, N, Satoyama, K, Sayeed, T, Schietinger, O, Schneider, C, Schwanda, A J, Schwartz, M E, Sevior, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, A, Somov, N, Soni, S, Stanic, M, Staric, T, Sumiyoshi, S, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, G, Varner, K E, Varvell, S, Villa, C C, Wang, C H, Wang, M-Z, Wang, Q L, Xie, B D, Yabsley, A, Yamaguchi, Y, Yamashita, M, Yamauchi, J, Ying, Y, Yuan, C C, Zhang, L M, Zhang, and Z P, Zhang

Abstract

Using 281 fb-1 of data from the Belle experiment recorded at or near the (4S) resonance, we have measured the rates of the "wrong-sign" decays D0 --K+ pi- pi0 and D0 --K+ pi- pi+ pi- relative to those of the Cabibbo-favored decays D0 --K- pi+ pi0 and D0 --K- pi+ pi+ pi-. These wrong-sign decays proceed via a doubly Cabibbo-suppressed amplitude or via D0-D0 mixing; the latter has not yet been observed. We obtain R(WS)(K pi pi0) = [0.229 +/- 0.015(stat)(+0.013)(-0.009)(syst)]% and R(WS)(K3pi) = [0.320 +/- 0.018(stat)(+0.018)(0.013)(syst)]%. The CP asymmetries are measured to be -0.006 +/- 0.053 and -0.018 +/- 0.044 for the K+ pi- pi0 and K+ pi- pi+ pi- final states, respectively.

Published
2005

47. Measurement of the Time-DependentCP-Violating Asymmetry inB0→KS0π0γDecays

Author

Y. Ushiroda, K. Sumisawa, M. Hazumi, K. Abe, I. Adachi, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, S.-K. Choi, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, S. Eidelman, F. Fang, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, A. Gorišek, J. Haba, K. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. M. Kim, K. Kinoshita, P. Križan, P. Krokovny, S. Kumar, C. C. Kuo, A. Kusaka, A. Kuzmin, Y.-J. Kwon, G. Leder, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, G. R. Moloney, T. Nagamine, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, A. J. Schwartz, K. Senyo, M. E. Sevior, T. Shibata, H. Shibuya, J. B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. Watanabe, Y. Watanabe, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Heyoung Yang, J. Ying, J. Zhang, L. M. Zhang, Z. P. Zhang, and D. Žontar

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, Gamma ray, General Physics and Astronomy, Resonance, 01 natural sciences, KEKB, 0103 physical sciences, Pi, CP violation, B meson, Invariant mass, 010306 general physics
Abstract

We present a new measurement of CP-violation parameters in B(0)-->K(0)(S)pi(0)gamma decay based on a sample of 275 x 10(6) BB pairs collected at the Gamma(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. One of the B mesons is fully reconstructed in the B(0)-->K(0)(S)pi(0)gamma decay. The flavor of the accompanying B meson is identified from its decay products. CP-violation parameters are obtained from the asymmetry in the distribution of the proper time intervals between the two B decays. We obtain SK(0)(S)(pi(0)gamma) = -0.58(+0.46)(-0.38)(stat) +/- 0.11(syst) and AK(0)(S)(pi(0)gamma) = +0.03 +/- 0.34(stat) +/- 0.11(syst), for the K(0)(S)pi(0) invariant mass covering the full range up to 1.8 GeV/c2. We also measure the CP-violation parameters for the case B(0)-->K(*0)(-->K(0)(S)pi(0))gamma and obtain S(K(*0)gamma) = -0.79(+0.63)(-0.50)(stat) +/- 0.10(syst) for A(K(*0)gamma) fixed at 0.

Published
2005
Full Text
View/download PDF

48. Measurement of Polarization and Triple-Product Correlations inB→ϕK*Decays

Author

K.-F. Chen, K. Abe, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, 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, R. Chistov, S.-K. Choi, Y. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, Y. Enari, F. Fang, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. K. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, S. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. E. Lee, Y.-J. Lee, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, J. MacNaughton, F. Mandl, T. Matsumoto, A. Matyja, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, G. R. Moloney, T. Nagamine, 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, C. W. Park, N. Parslow, L. S. Peak, R. Pestotnik, L. E. Piilonen, N. Root, M. Rozanska, H. Sagawa, Y. Sakai, T. R. Sarangi, N. Sato, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, T. Shibata, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, S. Uno, P. Urquijo, Y. Ushiroda, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, M. Watanabe, Y. Watanabe, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Heyoung Yang, J. Ying, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Žontar, and D. Zürcher

Subjects
Physics, 010308 nuclear & particles physics, Electron–positron annihilation, General Physics and Astronomy, Polarization (waves), 01 natural sciences, Helicity, Nuclear physics, KEKB, Amplitude, Triple product, 0103 physical sciences, CP violation, High Energy Physics::Experiment, 010306 general physics, Storage ring
Abstract

We present measurements of decay amplitudes and triple-product correlations in B-->phiK* decays based on 253 fb(-1) of data recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e(+)e(-) storage ring. The decay amplitudes for the three different helicity states are determined from the angular distributions of final-state particles. The longitudinal polarization amplitudes are found to be 0.45 +/- 0.05 +/- 0.02 for B0-->phiK(*0) and 0.52 +/- 0.08 +/- 0.03 for B+ -->phiK(*+) decays. CP- and T-odd CP-violating triple-product asymmetries are measured to be consistent with zero.

Published
2005
Full Text
View/download PDF

49. Study of decay mechanisms in B---Lambdac+ppi- decays and observation of low-mass structure in the Lambdac+p system

Author

N, Gabyshev, K, Abe, I, Adachi, H, Aihara, Y, Asano, V, Aulchenko, T, Aushev, A M, Bakich, U, Bitenc, I, Bizjak, S, Blyth, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, P, Chang, Y, Chao, A, Chen, W T, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, A, Chuvikov, S, Cole, J, Dalseno, M, Danilov, M, Dash, A, Drutskoy, S, Eidelman, Y, Enari, S, Fratina, T, Gershon, G, Gokhroo, B, Golob, A, Gorisek, T, Hara, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, S, Hou, W-S, Hou, Y B, Hsiung, T, Iijima, A, Imoto, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, J S, Kang, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, H R, Khan, H, Kichimi, H J, Kim, H O, Kim, S K, Kim, S M, Kim, K, Kinoshita, S, Korpar, P, Krokovny, S, Kumar, C C, Kuo, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, T, Lesiak, S-W, Lin, F, Mandl, T, Matsumoto, Y, Mikami, W, Mitaroff, H, Miyake, H, Miyata, R, Mizuk, T, Nagamine, Y, Nagasaka, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, H, Palka, C W, Park, H, Park, N, Parslow, L S, Peak, R, Pestotnik, L E, Piilonen, M, Rozanska, H, Sagawa, Y, Sakai, N, Sato, T, Schietinger, O, Schneider, A J, Schwartz, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, V, Sidorov, J B, Singh, A, Somov, R, Stamen, S, Stanic, M, Staric, T, Sumiyoshi, S Y, Suzuki, O, Tajima, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, Y, Teramoto, X C, Tian, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, S, Uno, P, Urquijo, G, Varner, K E, Varvell, S, Villa, C H, Wang, M-Z, Wang, Q L, Xie, B D, Yabsley, A, Yamaguchi, H, Yamamoto, Y, Yamashita, M, Yamauchi, Heyoung, Yang, C C, Zhang, J, Zhang, L M, Zhang, Z P, Zhang, V, Zhilich, and D, Zontar

Abstract

Using a sample of 152 x 10(6) BB pairs accumulated with the Belle detector at the KEKB e+e- collider, we study the decay mechanism of three-body charmed decay B- --Lambdac+ ppi-. The intermediate two-body decay B---Sigmac (2455)0 p is observed for the first time with a branching fraction of (3.7 +/- 0.7 +/- 0.4 +/- 1.0) x 10(-5) and a statistical significance of 8.4sigma. We also observe a low-mass enhancement in the (Lambdac+p) system, which can be parametrized as a Breit-Wigner function with a mass of (3.35(-0.02)(+0.01) +/-0.02) GeV/c2 and a width of (0.07(-0.03)(+0.04) +/-0.04) GeV/c2. We measure its branching fraction to be (3.9(-0.7)(+0.8) +/- 0.4 +/- 1.0) x 10(-5) with a statistical significance of 6.2sigma. The errors are statistical, systematic, and that of the Lambdac+--pK- pi+ decay branching fraction.

Published
2005

50. Observation ofB0→π0π0

Author

Y. Chao, P. Chang, K. Abe, H. Aihara, K. Akai, M. Akatsu, M. Akemoto, Y. Asano, T. Aushev, S. Bahinipati, A. M. Bakich, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, J. Flanagan, S. Fratina, K. Furukawa, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, H. Ikeda, 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, E. Kikutani, H. J. Kim, J. H. Kim, S. K. Kim, K. Kinoshita, H. Koiso, S. Korpar, P. Krokovny, S. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. E. Lee, S. H. Lee, Y.-J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, S. Michizono, T. Mimashi, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, T. T. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, Y. Ogawa, K. Ohmi, T. Ohshima, N. Ohuchi, K. Oide, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, C. W. Park, H. Park, N. Parslow, L. S. Peak, L. E. Piilonen, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, K. Senyo, M. E. Sevior, T. Shidara, B. Shwartz, V. Sidorov, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, R. Sugahara, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, M. Tawada, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, B. D. Yabsley, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, Heyoung Yang, J. Ying, K. Yokoyama, M. Yoshida, S. L. Zang, C. C. Zhang, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Žontar, and D. Zürcher

Subjects
Physics, Particle physics, Branching fraction, Electron–positron annihilation, media_common.quotation_subject, General Physics and Astronomy, Resonance, Asymmetry, law.invention, Nuclear physics, KEKB, law, Pi, CP violation, Collider, media_common
Abstract

We report the observation of the decay B0-->pi(0)pi(0), using a 253 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. The measured branching fraction is B(B0-->pi(0)pi(0))=(2.3(+0.4+0.2)(-0.5-0.3))x10(-6), with a significance of 5.8 standard deviations including systematic uncertainties. We also make a measurement of the direct CP violating asymmetry in this mode.

Published
2005
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results