Author: "Y. Kawakami" / Journal: physical review letters - Searchworks@Jio Institute Digital Library Search Results

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1. Early-Stage Dynamics of Light-Matter Interaction Leading to the Insulator-to-Metal Transition in a Charge Ordered Organic Crystal

Author: H. Unno, Y. Kawakami, Shinichiro Iwai, Kaoru Yamamoto, Takahiko Sasaki, T. Fukatsu, H. Itoh, Kenji Yonemitsu, Kyuya Yakushi, and Y. Sakurai
Subjects: Materials science, Condensed matter physics, Infrared, Intramolecular force, General Physics and Astronomy, Condensed Matter::Strongly Correlated Electrons, Insulator (electricity), Time domain, Electron, Wave function, Spectroscopy, Molecular physics, Ultrashort pulse
Abstract: Ultrafast dynamics of the light-matter interaction in a charge-ordered molecular insulator α-(BEDT-TTF) 2 I 3 were studied by pump-probe spectroscopy using few-optical-cycle infrared pulses (pulse width 12 fs). Coherent oscillation of the correlated electrons and subsequent Fano destructive interference with intramolecular vibration were observed in time domain; the results indicated a crucial role for electron-electron interplay in the light-matter interaction leading to the photoinduced insulator-to-metal transition. The qualitative features of this correlated electron motion were reproduced by calculations based on exact many-electron-phonon wave functions.
Published: 2010
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2. Optical Modulation of Effective On-Site Coulomb Energy for the Mott Transition in an Organic Dimer Insulator

Author: Takahiko Sasaki, T. Fukatsu, Masatomo Miura, Shinichiro Iwai, Naoki Yoneyama, Norio Kobayashi, and Y. Kawakami
Subjects: Condensed Matter::Quantum Gases, Materials science, Dimer, Electric potential energy, Mott insulator, General Physics and Astronomy, Mott transition, chemistry.chemical_compound, chemistry, Molecule, Condensed Matter::Strongly Correlated Electrons, Atomic physics, Metal–insulator transition, Spectroscopy, Excitation
Abstract: We report an optical modulation of the effective on-site Coulomb energy U on a dimer (U_{dimer}) for achieving the Mott insulator-to-metal transition in kappa-(BEDT-TTF)_{2}Cu[N(CN)_{2}]Br, as investigated by pump-probe spectroscopy. A reduction of U_{dimer} is optically induced by molecule displacement in the dimer under intradimer excitation. The mechanism of this metallization differs greatly from the photodoping-type mechanism reported previously. In contrast, a faster transition via the photodoping mechanism is detected for interdimer excitation. A metallic-domain-wall oscillation originating from the modulation of U_{dimer} was also observed near the critical end point of the Mott transition line.
Published: 2009
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3. Photoinduced Melting of a Stripe-Type Charge-Order and Metallic Domain Formation in a Layered BEDT-TTF-Based Organic Salt

Author: Shinichiro Iwai, Hideki Nakaya, Kyuya Yakushi, Kaoru Yamamoto, Akimitsu Kashiwazaki, F. Hiramatsu, Hatsumi Mori, Y. Kawakami, Hiroshi Okamoto, and Yutaka Nishio
Subjects: chemistry.chemical_classification, Materials science, business.industry, General Physics and Astronomy, Salt (chemistry), Charge (physics), Type (model theory), Instability, Metal, Crystallography, Optics, chemistry, visual_art, visual_art.visual_art_medium, Quasiparticle, Coulomb, Spectroscopy, business
Abstract: Photoinduced melting of charge-order (CO) in [bis(ethylenedithiolo)]-tetrathiafulvalene (BEDT-TTF) salts was investigated by femotosecond spectroscopy. Comparative studies on two polytypes exhibiting large [theta-(BEDT-TTF)2RbZn(SCN)_{4}] and small [alpha-(BEDT-TTF)2I3] molecular rearrangements through the CO transition were performed. Ultrafast melting of CO for both compounds demonstrates the major contribution of the electronic instability which is due to Coulomb interaction. The roles of the molecular rearrangements on the formation of the CO and the metallic domain are discussed on the basis of low-frequency lattice dynamics.
Published: 2007
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4. Evidence for DirectCPViolation inB0→K+π−Decays

Author: Y. Chao, P. Chang, K. Abe, N. Abe, I. Adachi, H. Aihara, K. Akai, M. Akatsu, M. Akemoto, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, Y. Ban, M. Barbero, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M.-C. 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, M. Danilov, M. Dash, L. Y. Dong, R. Dowd, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, D. Epifanov, C. W. Everton, F. Fang, J. Flanagan, S. Fratina, H. Fujii, Y. Funakoshi, K. Furukawa, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, B. Golob, M. Grosse Perdekamp, H. Guler, R. Guo, J. Haba, C. Hagner, F. Handa, K. Hara, T. Hara, N. C. Hastings, K. Hasuko, K. Hayasaka, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Higuchi, L. Hinz, T. Hojo, T. Hokuue, Y. Hoshi, K. Hoshina, S. Hou, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, H. Ikeda, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, K. Itoh, R. Itoh, M. Iwamoto, M. Iwasaki, Y. Iwasaki, R. Kagan, H. Kakuno, T. Kamitani, J. H. Kang, J. S. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, N. Kent, H. R. Khan, A. Kibayashi, H. Kichimi, M. Kikuchi, E. Kikutani, H. J. Kim, H. O. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, T. H. Kim, K. Kinoshita, S. Kobayashi, H. Koiso, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, T. Kubo, R. Kulasiri, S. Kumar, C. C. Kuo, H. Kurashiro, E. Kurihara, A. Kusaka, 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, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, M. Masuzawa, T. Matsuishi, H. Matsumoto, S. Matsumoto, T. Matsumoto, A. Matyja, S. Michizono, Y. Mikami, T. Mimashi, W. Mitaroff, K. Miyabayashi, Y. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, G. R. Moloney, G. F. Moorhead, T. Mori, J. Mueller, A. Murakami, T. Nagamine, Y. Nagasaka, T. Nakadaira, I. Nakamura, T. T. Nakamura, E. Nakano, M. Nakao, H. Nakayama, H. Nakazawa, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, A. Ogawa, S. Ogawa, Y. Ogawa, K. Ohmi, Y. Ohnishi, T. Ohshima, N. Ohuchi, K. Oide, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, N. Parslow, L. S. Peak, M. Pernicka, J.-P. Perroud, M. Peters, L. E. Piilonen, A. Poluektov, F. J. Ronga, N. Root, M. Rozanska, H. Sagawa, M. Saigo, S. Saitoh, Y. Sakai, H. Sakamoto, H. Sakaue, T. R. Sarangi, M. Satapathy, N. Sato, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, T. Seki, S. Semenov, K. Senyo, Y. Settai, R. Seuster, M. E. Sevior, T. Shibata, H. Shibuya, T. Shidara, B. Shwartz, V. Sidorov, V. Siegle, J. B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, R. Sugahara, A. Sugi, T. Sugimura, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, S. K. Swain, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, K. Tanabe, M. Tanaka, M. Tawada, G. N. Taylor, Y. Teramoto, X. C. Tian, S. Tokuda, S. N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, K. Uchida, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, M. Watanabe, Y. Watanabe, L. Widhalm, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, H. Yamamoto, N. Yamamoto, S. Yamamoto, T. Yamanaka, Y. Yamashita, M. Yamauchi, Heyoung Yang, P. Yeh, J. Ying, K. Yoshida, M. Yoshida, Y. Yuan, Y. Yusa, H. Yuta, S. L. Zang, C. C. Zhang, J. Zhang, L. M. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, T. Ziegler, D. Žontar, and D. Zürcher
Subjects: Physics, Nuclear physics, Particle physics, KEKB, law, Electron–positron annihilation, General Physics and Astronomy, CP violation, Collider, Mixing (physics), Charged particle, law.invention
Abstract: The evidence for direct charged particles (CP) violation in the decay B0→K+ π- was investigated with 253 fb-1 of data collected with the Belle detector at the KEKB e + e- collider. 275 x 106 BB pairs were used to observe a B→K±π∓ signal with 2140 ±53 events. Mixing induced CP violation in the B sector was established in b → ccs transitions. The result suggests large interference between tree and penguin diagrams and the existence of final state interactions.
Published: 2004
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5. Evidence forB0→π0π0

Author: J. Tanaka, Osamu Tajima, Gobinda Majumder, Hiroyuki Iwasaki, H. Ozaki, K. Neichi, T. Tsukamoto, M. D. Peters, O. Nitoh, S. H. Lee, T. Igaki, Hiroshi Sakamoto, Hiroaki Aihara, Y. Yamashita, S. Schrenk, K. Korotushenko, A. Tchouvikov, Rong-Shyang Lu, G. R. Moloney, T. Nagamine, H. C. Huang, M. Grosse Perdekamp, N. Tamura, K. Hoshina, S. Noguchi, Y. Ushiroda, M. H. Tanaka, M. Shimoyama, S. Uno, S. E. Vahsen, C. Schwanda, N.I. Root, Y. Miyabayashi, Hiroyuki Sagawa, J. Kaneko, H. Yamamoto, Y. Kawakami, R. Guo, M. C. Chang, S. Nishida, Ascelin Gordon, S. U. Kataoka, A. Sugi, H. Fujii, J. P. Perroud, K. Hasuko, T. Iijima, Y. Onuki, L. Y. Dong, H. Kakuno, Hikaru Kawai, T. Nakadaira, E. Kurihara, Akito Kusaka, M. Kataoka, F. Ohno, C. W. Park, E. Won, P. Chang, Hyun Woo Kim, Jie Zhang, Masashi Yokoyama, E. Nakano, V.A. Sidorov, V. M. Aulchenko, Y. Ban, Jung-Hyun Kim, Y. Yusa, Daniel Robert Marlow, G. F. Moorhead, K. Trabelsi, H. K. Jang, P. Krokovny, T. Tomura, K. Senyo, Patrick Koppenburg, K. Inami, D. Mohapatra, Kyo Yoshida, J. B. Singh, Masashi Hazumi, S. K. Choi, K. Ueno, T. Kawasaki, D. Zurcher, Y. Iwasaki, V. Siegle, Y. J. Kwon, T. Sumiyoshi, H. O. Kim, R. Kagan, A. Yamaguchi, Tapas Sarangi, Frederic Jean Ronga, Takahiko Matsubara, D. Epifanov, Shaji Kumar, S. Tokuda, Kevin Varvell, Y. Chao, F. Handa, H. Miyake, S. Eidelman, Y. Settai, I. Bedny, J. Li, S. W. Lin, J. Yashima, N. Parslow, M. Iwamoto, B. Shwartz, Chikara Fukunaga, Seema Bahinipati, J. W. Nam, T. J. Gershon, P. Krizan, P. Pakhlov, D. Liventsev, O. Schneider, Z.M. Zhu, Yasuhiko Yamada, K. S. Park, Y. Choi, M. Yamauchi, T. Hojo, J. G. Wang, A. Satpathy, A. Matyja, Ilija Bizjak, T. Hara, H. Hayashii, N. Abe, Hyunyong Kim, R. Abe, M. Rozanska, H. Guler, M. Iwasaki, A.E. Bondar, H. Palka, T. Uglov, H. Sakaue, L. E. Piilonen, S. L. Olsen, G. S. Varner, B. G. Cheon, A. Ishikawa, T. Aushev, W. S. Hou, N. Soni, R. Kulasiri, A. Bay, Kazuo Abe, M. Z. Wang, K. Kinoshita, S. Saitoh, H. Yanai, Y. Asano, P. Kapusta, N. Kawamura, S. Okuno, S. K. Kim, J. Dragic, R. Itoh, Y. Mikami, E. M. Heenan, T. Mori, Makoto Tomoto, H. Park, A. Ogawa, A. Bozek, F. Fang, Tsukasa Aso, S. K. Swain, Heejong Kim, G. N. Taylor, T. Abe, R. Dowd, J. S. Kang, J. Haba, Takuya Higuchi, Antonio Limosani, S. Narita, T. Nozaki, M. Starič, Kei Suzuki, James Mueller, A. Drutskoy, Y. Teramoto, Bruce Yabsley, F. Takasaki, S. Korpar, R. Chistov, S. Y. Suzuki, Jolanta Brodzicka, Elzbieta Banas, T. Okabe, S. Banerjee, S. Kobayashi, L. Widhalm, T. E. Browder, Yuji Enari, A. Kibayashi, M. Dash, L. S. Peak, Y. Unno, K. Sumisawa, Y. Igarashi, M. Asai, L.C. Moffitt, K. Takahashi, B. Golob, K. Tanabe, K. Uchida, K. F. Chen, Y. Zheng, J. S. Lange, L. Hinz, Heyoung Yang, N. Uozaki, J. MacNaughton, M. Danilov, Byoung Sup Ahn, P. Yeh, A. Garmash, Hirokazu Ishino, T. Hokuue, K. Hara, C. C. Wang, Z. P. Zhang, B. Takeshita, A. Kuzmin, N. Katayama, Rolf Seuster, T. Matsumoto, M. Pernicka, T. Seki, Yasushi Nagasaka, S. Ogawa, I. Adachi, H. Yuta, H. Nakazawa, G. Gokhroo, M. Akatsu, A. J. Schwartz, E.A. Dodson, C.W. Everton, D. Zontar, V.N. Zhilich, S. Semenov, W. A. Mitaroff, I. Higuchi, Y. Tamai, Young-Il Choi, K. Miyabayashi, Y. B. Hsiung, Hideyuki Kawai, H. Matsumoto, T. A. Shibata, H. Miyata, M. Nakao, Prafulla Kumar Behera, N. C. Hastings, Y. Hoshi, Y. Sakai, J. Schümann, T.H. Kim, D. W. Kim, N. Kent, Y. Watanabe, J. H. Kang, H. Kichimi, Caren Hagner, T. Tsuboyama, T. Lesiak, A. Sugiyama, T. Matsuishi, G. Leder, F. Mandl, K. Tamai, M. E. Sevior, S. Matsumoto, M. Satapathy, A. Murakami, T. Ziegler, Y. Harada, M. Bračko, Sadaharu Uehara, T. Yamanaka, Samo Stanič, Shigeki Mori, A. M. Bakich, Z. Natkaniec, T. Ohshima, S.N. Tovey, Koya Abe, N. Gabyshev, You-Jin Yuan, W. Ostrowicz, C. H. Wang, C. C. Zhang, H. Shibuya, M. Watanabe, and V. Eiges
Subjects: Physics, Particle physics, KEKB, Branching fraction, Electron–positron annihilation, Pi, General Physics and Astronomy, Resonance
Abstract: We report evidence for the decay $B^0 \to \pi^0 \pi^0$. The analysis is based on a data sample of 152 million $B\bar{B}$ pairs collected at the $\Upsilon(4s)$ resonance with the Belle detector at the KEKB $e^+ e^-$ storage ring. We find $25.6^{+ 9.3}_{-8.4}(stat)^{+1.6}_{-1.4}(syst)$ $B^0 \to \pi^0 \pi^0$ signal events with a significance of 3.4 standard deviations. We measure the branching fraction to be ($1.7 \pm 0.6 (stat) \pm 0.2 (syst))*10^{-6}$.
Published: 2003
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6. Observation ofB¯0→D0K¯0andB¯0→D0K¯*0Decays

Author: P. Krokovny, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, A. Bay, I. Bedny, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, M. Danilov, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, J. Haba, T. Hara, K. Hasuko, H. Hayashii, M. Hazumi, I. Higuchi, T. Higuchi, T. Hojo, Y. Hoshi, W.-S. Hou, H.-C. Huang, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, J. Kaneko, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, Y. Kawakami, T. Kawasaki, H. Kichimi, D. W. Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, J. H. Kim, S. Kobayashi, P. Koppenburg, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, M. Peters, L. E. Piilonen, M. Rozanska, K. Rybicki, H. Sagawa, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, J. Schümann, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, S. Stanič, M. Starič, A. Sugi, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, S. K. Swain, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar
Subjects: General Physics and Astronomy
Published: 2003
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7. Studies of the DecayB±→DCPK±

Author: K. Abe, N. Abe, R. Abe, T. Abe, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, P. K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, B. C. K. Casey, M.-C. Chang, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, H. Fujii, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, A. Gordon, R. Guo, J. Haba, T. Hara, Y. Harada, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. R. Hou, W.-S. Hou, S.-C. Hsu, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, N. Katayama, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, S. K. Kim, T. H. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, A. Limosani, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, K. Miyabayashi, Y. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, T. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, L. S. Peak, J.-P. Perroud, M. Peters, L. E. Piilonen, J. L. Rodriguez, F. J. Ronga, N. Root, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S. Y. Suzuki, S. K. Swain, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, S. N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, P. Yeh, Y. Yuan, Y. Yusa, J. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, and D. Žontar
Subjects: Physics, Particle decay, Particle physics, KEKB, Branching fraction, Electron–positron annihilation, Hadron, Analytical chemistry, Pi, General Physics and Astronomy, CP violation, B meson
Abstract: We report studies of the Cabibbo-suppressed decay B+/- --> DCPK+/-, where D-CP denotes CP eigenstates of the D-0 - (D) over bar (0) system. The analysis is based on a 29.1 fb(-1) sample collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric e(+)e(-) storage ring. We measure ratios of branching fractions, relative to Cabibbo-favored B+/--->D(CP)pi+/-, of B>(B- --> D1K-)/B(B- --> D(1)pi(-)) = 0.125 +/-0.036 +/- 0.010 and B(B- --> D2K-)/B(B- --> D(2)pi(-)) = 0.119 +/- 0.028 +/- 0.006; the index 1 (2) denotes the CP = +1 (-1) eigenstate. We also extract the partial rate asymmetries for B+/- --> DCPK+/-, finding A(1) = 0.29 +/- 0.26 +/- 0.05 and A(2) = -0.22 +/- 0.24 +/- 0.04.
Published: 2003
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8. Measurement of Branching Fractions forB→ηcK(*)Decays

Author: F. Fang, T. Hojo, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, A. M. Bakich, Y. Ban, E. Banas, A. Bay, P. K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, M. Danilov, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, T. Hara, N. C. Hastings, H. Hayashii, M. Hazumi, E. M. Heenan, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, Y. Kawakami, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, S. K. Kim, K. Kinoshita, S. Kobayashi, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, D. Liventsev, R.-S. Lu, J. MacNaughton, F. Mandl, S. Matsumoto, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, C. W. Park, H. Park, K. S. Park, J.-P. Perroud, M. Peters, L. E. Piilonen, F. J. Ronga, N. Root, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, H. Sakamoto, M. Satapathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, N. Soni, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, T. Takahashi, F. Takasaki, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, Y. Ushiroda, S. E. Vahsen, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Yashima, M. Yokoyama, Y. Yuan, Y. Yusa, C. C. Zhang, J. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar
Subjects: Physics, Particle physics, KEKB, Meson, Electron–positron annihilation, General Physics and Astronomy, CP violation, Branching (polymer chemistry)
Abstract: We report measurements of branching fractions for charged and neutral $B\ensuremath{\rightarrow}{\ensuremath{\eta}}_{c}K$ decays where the ${\ensuremath{\eta}}_{c}$ meson is reconstructed in the ${K}_{S}^{0}{K}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}$, ${K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$, ${K}^{*0}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$, and $p\overline{p}$ decay channels. The neutral ${B}^{0}$ channel is a $CP$ eigenstate and can be used to measure the $CP$ violation parameter $\mathrm{sin} 2{\ensuremath{\varphi}}_{1}$. We also report the first observation of the ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\eta}}_{c}{K}^{*0}$ mode. The results are based on an analysis of $29.1\text{ }{\mathrm{f}\mathrm{b}}^{\ensuremath{-}1}$ of data collected by the Belle detector at KEKB.
Published: 2003
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9. Measurement of the Electroweak Penguin ProcessB→Xsℓ+ℓ−

Author: J. Kaneko, K. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, W. Bartel, A. Bay, P. K. Behera, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, S. Eidelman, V. Eiges, Y. Enari, C. W. Everton, F. Fang, H. Fujii, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, R. Guo, J. Haba, F. Handa, T. Hara, Y. Harada, N. C. Hastings, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Higuchi, L. Hinz, T. Hojo, Y. Hoshi, W.-S. Hou, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, S. K. Kim, K. Kinoshita, S. Kobayashi, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, A. Limosani, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, S. Matsumoto, T. Matsumoto, W. Mitaroff, K. Miyabayashi, Y. Miyabayashi, H. Miyake, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, J.-P. Perroud, M. Peters, L. E. Piilonen, N. Root, K. Rybicki, H. Sagawa, Y. Sakai, H. Sakamoto, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S. Y. Suzuki, S. K. Swain, H. Tajima, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, M. Tomoto, T. Tomura, K. Trabelsi, W. Trischuk, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Yashima, M. Yokoyama, Y. Yuan, Y. Yusa, C. C. Zhang, J. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, and D. Žontar
Subjects: Physics, Particle physics, Strange quark, Muon, Branching fraction, Electron–positron annihilation, Hadron, Electroweak interaction, General Physics and Astronomy, Nuclear physics, KEKB, High Energy Physics::Experiment, B meson, Nuclear Experiment
Abstract: We report the first measurement of the branching fraction for the inclusive decay B → X s l + l - , where l is either an electron or a muon, and X s is a hadronic recoil system that contains an s quark. We analyzed a data sample of 65.4 x 10 6 B meson pairs collected with the Belle detector at the KEKB e + e - asymmetric-energy collider. We find B(B → X s l + l - ) = [6.1 ′ 1.4(stat) + 1 . 4 - 1 . 1 (syst)] × 10 - 6 for dilepton masses greater than 0.2 GeV/c 2 .
Published: 2003
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10. Measurement of theB0−B¯0Mixing ParameterΔmdusing SemileptonicB0Decays

Author: K. Hara, M. Hazumi, K. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, A. Bay, I. Bedny, P. K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, J. Dragic, S. Eidelman, V. Eiges, Y. Enari, C. W. Everton, F. Fang, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, R. Guo, J. Haba, K. Hanagaki, F. Handa, T. Hara, N. C. Hastings, H. Hayashii, E. M. Heenan, I. Higuchi, T. Higuchi, L. Hinz, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, S.-C. Hsu, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, H. Kakuno, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, Hyunwoo Kim, T. H. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, T. Matsuishi, S. Matsumoto, T. Matsumoto, K. Miyabayashi, Y. Miyabayashi, H. Miyata, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, 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, H. Palka, C. W. Park, H. Park, L. S. Peak, J.-P. Perroud, M. Peters, L. E. Piilonen, N. Root, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, H. Sakamoto, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, B. Shwartz, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S. Y. Suzuki, T. Takahashi, F. Takasaki, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, M. Tomoto, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, M. Yokoyama, Y. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, and D. Žontar
Subjects: Physics, Particle physics, High Energy Physics::Lattice, High Energy Physics::Phenomenology, General Physics and Astronomy, Resonance, law.invention, Distribution (mathematics), KEKB, law, High Energy Physics::Experiment, B meson, Collider, Mixing (physics)
Abstract: We present a measurement of the B0-Bmacr;(0) mixing parameter Deltam(d) using neutral B meson pairs in a 29.1 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We exclusively reconstruct one neutral B meson in the semileptonic B0-->D(*-)l(+)nu decay mode and identify the flavor of the accompanying B meson from its decay products. From the distribution of the time intervals between the two flavor-tagged B meson decay points, we obtain Deltam(d)=(0.494+/-0.012+/-0.015) ps(-1), where the first error is statistical and the second error is systematic.
Published: 2002
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11. Observation ofDs+K−and Evidence forDs+π−Final States in NeutralBDecays

Author: P. Krokovny, K. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, A. Bay, I. Bedny, P. K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. W. Everton, F. Fang, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, A. Gordon, R. Guo, J. Haba, K. Hanagaki, F. Handa, Y. Harada, H. Hayashii, M. Hazumi, E. M. Heenan, T. Higuchi, L. Hinz, T. Hojo, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, T. Igaki, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, H. K. Jang, J. Kaneko, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, S. K. Kim, K. Kinoshita, S. Kobayashi, S. Korpar, P. Križan, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, A. Limosani, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, K. Miyabayashi, Y. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, T. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, C. W. Park, H. Park, J.-P. Perroud, M. Peters, L. E. Piilonen, F. J. Ronga, N. Root, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, H. Sakamoto, M. Satapathy, A. Satpathy, O. Schneider, C. Schwanda, S. Semenov, K. Senyo, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S. Y. Suzuki, S. K. Swain, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Yashima, Y. Yuan, Y. Yusa, C. C. Zhang, J. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, and D. Žontar
Subjects: Physics, Nuclear magnetic resonance, KEKB, Annihilation, Branching fraction, Electron–positron annihilation, Pi, Analytical chemistry, General Physics and Astronomy, Value (computer science), B meson
Abstract: We report the first observation of a B meson decay that is not accessible by a direct spectator process. The channel B(0)-->D(+)(s)K- is found in a sample of 85 x 10(6) BB; events, collected with the Belle detector at KEKB, with a branching fraction B(B(0)-->D(+)(s)K-)=(4.6(+1.2)(-1.1)+/-1.3) x 10(-5). We also obtain evidence for the B0-->D(+)(s)pi(-) decay with branching fraction B(B0-->D(+)(s)pi(-))=(2.4(+1.0)(-0.8)+/-0.7) x 10(-5). This value may be used to extract a model-dependent value of |V(ub)|.
Published: 2002
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12. RadiativeBMeson Decays intoKπγandKππγFinal States

Author: S. Nishida, M. Nakao, K. Abe, T. Abe, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, W. Bartel, A. Bay, I. Bedny, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, T. Gershon, A. Gordon, K. Gotow, R. Guo, J. Haba, T. Hara, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Higuchi, T. Hojo, T. Hokuue, Y. Hoshi, S. R. Hou, W.-S. Hou, S.-C. Hsu, H.-C. Huang, T. Igaki, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwamoto, H. Iwasaki, Y. Iwasaki, P. Jalocha, H. K. Jang, J. H. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, T. H. Kim, K. Kinoshita, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, S. Matsumoto, T. Matsumoto, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, S. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, J. W. Nam, Z. Natkaniec, K. Neichi, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, F. Ohno, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, L. S. Peak, J.-P. Perroud, M. Peters, L. E. Piilonen, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, H. Sakamoto, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, S. Stanič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, M. Tomoto, T. Tomura, S. N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, Y. Yuan, Y. Yusa, J. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar
Subjects: Physics, General Physics and Astronomy
Published: 2002
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13. Observation ofB±→ωK±Decay

Author: R.-S. Lu, K. Abe, N. Abe, R. Abe, T. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, I. Bedny, P. K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, B. C. K. Casey, M.-C. Chang, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, C. W. Everton, C. Fukunaga, N. Gabyshev, T. Gershon, B. Golob, A. Gordon, R. Guo, J. Haba, T. Hara, Y. Harada, H. Hayashii, M. Hazumi, E. M. Heenan, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, S.-C. Hsu, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, S. K. Kim, K. Kinoshita, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, G. Leder, S. H. Lee, J. Li, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, K. Miyabayashi, Y. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, T. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, F. Ohno, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Palka, C. W. Park, H. Park, L. S. Peak, J.-P. Perroud, M. Peters, L. E. Piilonen, N. Root, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, M. Tomoto, T. Tomura, S. N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, Y. Yamashita, M. Yamauchi, P. Yeh, Y. Yuan, J. Zhang, Z. P. Zhang, Y. Zheng, and D. Žontar
Subjects: Physics, General Physics and Astronomy
Published: 2002
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14. Observation of Doublecc¯Production ine+e−Annihilation ats≈10.6 GeV

Author: J. Kaneko, S. E. Vahsen, K. Sumisawa, K. Hoshina, S. K. Swain, T. Hokuue, Ascelin Gordon, H. J. Kim, H. Ozaki, A. Bondar, L. Y. Dong, K. Neichi, J. P. Perroud, F. Ohno, E. Won, Jolanta Brodzicka, M. D. Peters, Zhenyu Zhang, O. Nitoh, S. Stanič, Ho Kim, L. S. Peak, N. Kawamura, S. H. Lee, T. J. Gershon, T. Igaki, Chikara Fukunaga, T. Ohshima, Masashi Hazumi, J. W. Nam, M. H. Tanaka, Heejong Kim, T. Mori, N. C. Hastings, Byoung Sup Ahn, M. Starič, D. Liventsev, T. Aushev, Hiroyuki Sagawa, T. Hojo, J. S. Kang, S. Uno, C. Schwanda, Hiroaki Aihara, B. C. K. Casey, T. Tomura, G. S. Varner, S. R. Hou, T. Takahashi, O. Schneider, T. Iijima, S. Nishida, V.N. Zhilich, R. Itoh, Ju Hwan Kang, Y. Unno, T. Matsumoto, C. W. Park, N. Katayama, S. Semenov, Y. Choi, J. Li, C. C. Wang, Seong Keun Kim, E. Nakano, V.A. Sidorov, Y. Kawakami, S.I. Eidelman, Tsukasa Aso, Rolf Seuster, S. K. Choi, V.M. Aulchenko, Y. Yusa, P. Krokovny, Rong-Shyang Lu, M. Akatsu, Y. Iwasaki, I. Adachi, Y. Igarashi, M. Iwamoto, T. E. Browder, W. S. Hou, Y. J. Kwon, S. Suzuki, Yong Ban, K. Kinoshita, M. Yamauchi, H. Miyata, Prafulla Kumar Behera, H. K. Jang, N. Tamura, R. Abe, A. Yamaguchi, R. Guo, Jasvinder A. Singh, Gobinda Majumder, Hiroyuki Iwasaki, Y. Hoshi, K. Inami, D. W. Kim, M. Danilov, Z. Natkaniec, T. Tsukamoto, Hyunwoo Kim, S. Tokuda, Y. Sakai, Y. Teramoto, K. S. Park, H. Miyake, T.H. Kim, S. Noguchi, F. Handa, P. Pakhlov, A. Satpathy, Byung Gu Cheon, S. L. Olsen, J. Yashima, J. Dragic, A. Bozek, A.S. Kuzmin, N. Gabyshev, Yasuhiko Yamada, G. R. Moloney, H. Hayashii, You-Jin Yuan, A. Drutskoy, A. Sugi, S. Ogawa, M. Z. Wang, S. Saitoh, H. Palka, L. E. Piilonen, A. Sugiyama, H. Yanai, G. N. Taylor, J. S. Lange, R. Kulasiri, Sadaharu Uehara, T. Kawasaki, A. M. Bakich, R. Chistov, T. Sumiyoshi, A. Ishikawa, A. Bay, J. MacNaughton, T. Nozaki, F. Takasaki, W. Trischuk, A. Garmash, H. K. Park, Y. Harada, H. Kawai, Y. Onuki, Y. Yamashita, Suneel Kumar, K. Senyo, S. N. Tovey, Yasushi Nagasaka, M. Bračko, D. Žontar, E. M. Heenan, Kei Suzuki, Kevin Varvell, G. Leder, T. Nagamine, H. C. Huang, F. Mandl, K. Tamai, M. E. Sevior, S. Matsumoto, M. Satapathy, K. Ueno, W. Bartel, Y. Watanabe, Yuji Enari, H. Kichimi, T. Tsuboyama, I. Higuchi, M. Nakao, H. Shibuya, V. Eiges, Y. Chao, S. Schrenk, W. Ostrowicz, J. G. Wang, N.I. Root, P. Chang, C. H. Wang, Kazuo Abe, B. D. Yabsley, T. Hara, Y. Asano, P. Kapusta, S. Okuno, T. Abe, Takuya Higuchi, Elzbieta Banas, and T. Okabe
Subjects: Physics, Crystallography, Particle physics, KEKB, Annihilation, Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, General Physics and Astronomy, High Energy Physics::Experiment, Production (computer science), Continuum (set theory), Open charm
Abstract: We report the observation of prompt $J/\ensuremath{\psi}$ via double $c\overline{c}$ production from the ${e}^{+}{e}^{\ensuremath{-}}$ continuum. In this process one $c\overline{c}$ pair fragments into a $J/\ensuremath{\psi}$ meson while the remaining pair either produces a charmonium state or fragments into open charm. Both cases have been experimentally observed. We find cross sections of $\ensuremath{\sigma}[{e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\eta}}_{c}(\ensuremath{\gamma})]\ifmmode\times\else\texttimes\fi{}\mathcal{B}({\ensuremath{\eta}}_{c}\ensuremath{\rightarrow}\ensuremath{\ge}4\text{ }\text{ }\mathrm{\text{charged}})=({0.033}_{\ensuremath{-}0.006}^{+0.007}\ifmmode\pm\else\textpm\fi{}0.009)\text{ }\text{ }\mathrm{p}\mathrm{b}$ and $\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}{D}^{*+}X)=({0.53}_{\ensuremath{-}0.15}^{+0.19}\ifmmode\pm\else\textpm\fi{}0.14)\text{ }\text{ }\mathrm{p}\mathrm{b}$ and infer $\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}c\overline{c})/\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}X)={0.59}_{\ensuremath{-}0.13}^{+0.15}\ifmmode\pm\else\textpm\fi{}0.12$. These results are obtained from a $46.2\text{ }\text{ }{\mathrm{f}\mathrm{b}}^{\ensuremath{-}1}$ data sample collected near the $\ensuremath{\Upsilon}(4S)$ resonance, with the Belle detector at the KEKB collider.
Published: 2002
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15. Publisher’s Note: Observation of theηc(2S)in ExclusiveB→KKSK−π+Decays [Phys. Rev. Lett89, 102001 (2002)]

Author: S.-K. Choi, S. L. Olsen, K. Abe, R. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, A. Bay, P. K. Behera, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, Y. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, H. Fujii, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, A. Gordon, R. Guo, F. Handa, T. Hara, Y. Harada, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Higuchi, T. Hojo, T. Hokuue, Y. Hoshi, S. R. Hou, W.-S. Hou, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwamoto, H. Iwasaki, Y. Iwasaki, J. Kaneko, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, T. H. Kim, K. Kinoshita, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, S. Matsumoto, T. Matsumoto, H. Miyake, H. Miyata, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, J. W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, F. Ohno, T. Ohshima, T. Okabe, S. Okuno, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, L. S. Peak, J.-P. Perroud, M. Peters, L. E. Piilonen, F. J. Ronga, N. Root, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, S. Semenov, K. Senyo, M. E Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, S. N. Tovey, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, Y. Ushiroda, S. E. Vahsen, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Yashima, M. Yokoyama, Y. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, and D. Žontar
Subjects: Physics, General Physics and Astronomy
Published: 2002
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16. Measurement of branching fractions for B--eta(c)K(*) decays

Author: F, Fang, T, Hojo, K, Abe, T, Abe, I, Adachi, H, Aihara, M, Akatsu, Y, Asano, T, Aso, V, Aulchenko, A M, Bakich, Y, Ban, E, Banas, A, Bay, P K, Behera, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, B C K, Casey, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, M, Danilov, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, B, Golob, T, Hara, N C, Hastings, H, Hayashii, M, Hazumi, E M, Heenan, T, Higuchi, L, Hinz, T, Hokuue, Y, Hoshi, W-S, Hou, H-C, Huang, T, Igaki, Y, Igarashi, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, H, Iwasaki, Y, Iwasaki, H K, Jang, J H, Kang, J S, Kang, P, Kapusta, N, Katayama, H, Kawai, Y, Kawakami, T, Kawasaki, H, Kichimi, D W, Kim, Heejong, Kim, H J, Kim, H O, Kim, Hyunwoo, Kim, S K, Kim, K, Kinoshita, S, Kobayashi, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, J, Li, D, Liventsev, R-S, Lu, J, MacNaughton, F, Mandl, S, Matsumoto, T, Matsumoto, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, G R, Moloney, T, Mori, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, M, Nakao, H, Nakazawa, J W, Nam, Z, Natkaniec, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, H, Ozaki, P, Pakhlov, C W, Park, H, Park, K S, Park, J-P, Perroud, M, Peters, L E, Piilonen, F J, Ronga, N, Root, M, Rozanska, K, Rybicki, H, Sagawa, S, Saitoh, Y, Sakai, H, Sakamoto, M, Satapathy, O, Schneider, S, Schrenk, C, Schwanda, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, B, Shwartz, V, Sidorov, N, Soni, S, Stanic, M, Staric, A, Sugi, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, T, Takahashi, F, Takasaki, N, Tamura, J, Tanaka, M, Tanaka, G N, Taylor, Y, Teramoto, S, Tokuda, T, Tomura, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, S, Uno, Y, Ushiroda, S E, Vahsen, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, J, Yashima, M, Yokoyama, Y, Yuan, Y, Yusa, C C, Zhang, J, Zhang, Z P, Zhang, V, Zhilich, and D, Zontar
Abstract: We report measurements of branching fractions for charged and neutral B--eta(c)K decays where the eta(c) meson is reconstructed in the K(0)(S)K+/-pi(-/+), K+K-pi(0), K(*0)K-pi(+), and pp; decay channels. The neutral B0 channel is a CP eigenstate and can be used to measure the CP violation parameter sin(2phi(1). We also report the first observation of the B0--eta(c)K(*0) mode. The results are based on an analysis of 29.1 fb(-1) of data collected by the Belle detector at KEKB.
Published: 2002

17. Observation of theηc(2S)in ExclusiveB→KKSK−π+Decays

Author: S.-K. Choi, S. L. Olsen, K. Abe, R. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, A. Bay, P. K. Behera, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, Y. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, H. Fujii, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, A. Gordon, R. Guo, F. Handa, T. Hara, Y. Harada, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Higuchi, T. Hojo, T. Hokuue, Y. Hoshi, S. R. Hou, W.-S. Hou, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwamoto, H. Iwasaki, Y. Iwasaki, J. Kaneko, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, T. H. Kim, K. Kinoshita, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, S. Matsumoto, T. Matsumoto, H. Miyake, H. Miyata, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, J. W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, F. Ohno, T. Ohshima, T. Okabe, S. Okuno, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, L. S. Peak, J.-P. Perroud, M. Peters, L. E. Piilonen, F. J. Ronga, N. Root, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, S. Semenov, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, S. N. Tovey, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, Y. Ushiroda, S. E. Vahsen, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Yashima, M. Yokoyama, Y. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, and D. Žontar
Subjects: Physics, Particle physics, KEKB, Meson, Electron–positron annihilation, General Physics and Astronomy, High Energy Physics::Experiment, State (functional analysis), Atomic physics
Abstract: We report the observation of a narrow peak in the ${K}_{S}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ invariant mass distribution in a sample of exclusive $B\ensuremath{\rightarrow}K{K}_{S}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decays collected with the Belle detector at the KEKB asymmetric ${e}^{+}{e}^{\ensuremath{-}}$ collider. The measured mass of the peak is $M=3654\ifmmode\pm\else\textpm\fi{}6(\mathrm{s}\mathrm{t}\mathrm{a}\mathrm{t})\ifmmode\pm\else\textpm\fi{}8(\mathrm{s}\mathrm{y}\mathrm{s}\mathrm{t})\text{ }\text{ }\mathrm{M}\mathrm{e}\mathrm{V}/{c}^{2}$, and we place a 90% confidence level upper limit on the width of $\ensuremath{\Gamma}l55\text{ }\text{ }\mathrm{M}\mathrm{e}\mathrm{V}/{c}^{2}$. The properties agree with heavy-quark potential model expectations for the ${\ensuremath{\eta}}_{c}(2S)$ meson, the $n=2$ singlet $S$ charmonium state.
Published: 2002
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18. Measurement of the electroweak penguin process B--X(s)l+l

Author: J, Kaneko, K, Abe, T, Abe, I, Adachi, Byoung Sup, Ahn, H, Aihara, M, Akatsu, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, E, Banas, W, Bartel, A, Bay, P K, Behera, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, B C K, Casey, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, M, Danilov, L Y, Dong, S, Eidelman, V, Eiges, Y, Enari, C W, Everton, F, Fang, H, Fujii, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, R, Guo, J, Haba, F, Handa, T, Hara, Y, Harada, N C, Hastings, H, Hayashii, M, Hazumi, E M, Heenan, I, Higuchi, T, Higuchi, L, Hinz, T, Hojo, Y, Hoshi, W-S, Hou, H-C, Huang, T, Igaki, Y, Igarashi, T, Iijima, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, H, Iwasaki, Y, Iwasaki, H K, Jang, J H, Kang, J S, Kang, N, Katayama, H, Kawai, Y, Kawakami, N, Kawamura, T, Kawasaki, H, Kichimi, D W, Kim, Heejong, Kim, H J, Kim, H O, Kim, Hyunwoo, Kim, S K, Kim, K, Kinoshita, S, Kobayashi, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, S, Kumar, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, J, Li, A, Limosani, R-S, Lu, J, MacNaughton, G, Majumder, F, Mandl, D, Marlow, S, Matsumoto, T, Matsumoto, W, Mitaroff, K, Miyabayashi, Y, Miyabayashi, H, Miyake, G R, Moloney, T, Mori, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, M, Nakao, J W, Nam, K, Neichi, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, W, Ostrowicz, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, K S, Park, J-P, Perroud, M, Peters, L E, Piilonen, N, Root, K, Rybicki, H, Sagawa, Y, Sakai, H, Sakamoto, M, Satapathy, A, Satpathy, O, Schneider, S, Schrenk, C, Schwanda, S, Semenov, K, Senyo, R, Seuster, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, N, Soni, S, Stanic, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, S Y, Suzuki, S K, Swain, H, Tajima, T, Takahashi, F, Takasaki, K, Tamai, N, Tamura, J, Tanaka, M, Tanaka, G N, Taylor, Y, Teramoto, S, Tokuda, M, Tomoto, T, Tomura, K, Trabelsi, W, Trischuk, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, S, Uno, Y, Ushiroda, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, J, Yashima, M, Yokoyama, Y, Yuan, Y, Yusa, C C, Zhang, J, Zhang, Z P, Zhang, Y, Zheng, V, Zhilich, and D, Zontar
Abstract: We report the first measurement of the branching fraction for the inclusive decay B--X(s)l(+)l(-), where l is either an electron or a muon, and X(s) is a hadronic recoil system that contains an s quark. We analyzed a data sample of 65.4 x 10(6) B meson pairs collected with the Belle detector at the KEKB e(+)e(-) asymmetric-energy collider. We find B(B--X(s)l(+)l(-))=[6.1 +/-1.4(stat) +1.4-1.1(syst)] x 10(-6) for dilepton masses greater than 0.2 GeV/c(2).
Published: 2002

19. Observation of D+(s)K- and evidence for D+(s)pi- final states in neutral B decays

Author: P, Krokovny, K, Abe, T, Abe, I, Adachi, Byoung Sup, Ahn, H, Aihara, M, Akatsu, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, E, Banas, A, Bay, I, Bedny, P K, Behera, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, B C K, Casey, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, M, Danilov, L Y, Dong, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, C W, Everton, F, Fang, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, B, Golob, A, Gordon, R, Guo, J, Haba, K, Hanagaki, F, Handa, Y, Harada, H, Hayashii, M, Hazumi, E M, Heenan, T, Higuchi, L, Hinz, T, Hojo, T, Hokuue, Y, Hoshi, W-S, Hou, H-C, Huang, T, Igaki, T, Iijima, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, H, Iwasaki, H K, Jang, J, Kaneko, J H, Kang, J S, Kang, N, Katayama, H, Kawai, Y, Kawakami, N, Kawamura, T, Kawasaki, H, Kichimi, D W, Kim, Heejong, Kim, H J, Kim, H O, Kim, Hyunwoo, Kim, S K, Kim, K, Kinoshita, S, Kobayashi, S, Korpar, P, Krizan, R, Kulasiri, S, Kumar, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, J, Li, A, Limosani, D, Liventsev, R-S, Lu, J, MacNaughton, G, Majumder, F, Mandl, D, Marlow, T, Matsuishi, S, Matsumoto, T, Matsumoto, W, Mitaroff, K, Miyabayashi, Y, Miyabayashi, H, Miyake, H, Miyata, G R, Moloney, T, Mori, A, Murakami, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, M, Nakao, H, Nakazawa, J W, Nam, Z, Natkaniec, K, Neichi, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S L, Olsen, Y, Onuki, W, Ostrowicz, H, Ozaki, P, Pakhlov, C W, Park, H, Park, J-P, Perroud, M, Peters, L E, Piilonen, F J, Ronga, N, Root, K, Rybicki, H, Sagawa, S, Saitoh, Y, Sakai, H, Sakamoto, M, Satapathy, A, Satpathy, O, Schneider, C, Schwanda, S, Semenov, K, Senyo, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, S, Stanic, M, Staric, A, Sugi, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, S Y, Suzuki, S K, Swain, T, Takahashi, F, Takasaki, K, Tamai, N, Tamura, J, Tanaka, M, Tanaka, G N, Taylor, Y, Teramoto, S, Tokuda, T, Tomura, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, Y, Unno, S, Uno, Y, Ushiroda, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, J, Yashima, Y, Yuan, Y, Yusa, C C, Zhang, J, Zhang, Z P, Zhang, Y, Zheng, V, Zhilich, and D, Zontar
Abstract: We report the first observation of a B meson decay that is not accessible by a direct spectator process. The channel B(0)--D(+)(s)K- is found in a sample of 85 x 10(6) BB; events, collected with the Belle detector at KEKB, with a branching fraction B(B(0)--D(+)(s)K-)=(4.6(+1.2)(-1.1)+/-1.3) x 10(-5). We also obtain evidence for the B0--D(+)(s)pi(-) decay with branching fraction B(B0--D(+)(s)pi(-))=(2.4(+1.0)(-0.8)+/-0.7) x 10(-5). This value may be used to extract a model-dependent value of |V(ub)|.
Published: 2002

20. Measurement of the B(0)-B(0) mixing parameter Deltam(d) using semileptonic B0 decays

Author: K, Hara, M, Hazumi, K, Abe, T, Abe, I, Adachi, Byoung Sup, Ahn, H, Aihara, M, Akatsu, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, A, Bay, I, Bedny, P K, Behera, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, B C K, Casey, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, M, Danilov, L Y, Dong, J, Dragic, S, Eidelman, V, Eiges, Y, Enari, C W, Everton, F, Fang, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, B, Golob, R, Guo, J, Haba, K, Hanagaki, F, Handa, T, Hara, N C, Hastings, H, Hayashii, E M, Heenan, I, Higuchi, T, Higuchi, L, Hinz, Y, Hoshi, W-S, Hou, Y B, Hsiung, S-C, Hsu, H-C, Huang, T, Igaki, Y, Igarashi, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, H, Iwasaki, Y, Iwasaki, H K, Jang, H, Kakuno, J H, Kang, J S, Kang, N, Katayama, H, Kawai, Y, Kawakami, N, Kawamura, H, Kichimi, D W, Kim, Heejong, Kim, H J, Kim, Hyunwoo, Kim, T H, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, S, Kumar, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, J, Li, R-S, Lu, J, MacNaughton, G, Majumder, F, Mandl, T, Matsuishi, S, Matsumoto, T, Matsumoto, K, Miyabayashi, Y, Miyabayashi, H, Miyata, G R, Moloney, T, Mori, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, M, Nakao, J W, Nam, 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, H, Palka, C W, Park, H, Park, L S, Peak, J-P, Perroud, M, Peters, L E, Piilonen, N, Root, M, Rozanska, K, Rybicki, H, Sagawa, S, Saitoh, Y, Sakai, H, Sakamoto, M, Satapathy, A, Satpathy, O, Schneider, S, Schrenk, C, Schwanda, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, B, Shwartz, J B, Singh, N, Soni, S, Stanic, M, Staric, A, Sugi, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, S Y, Suzuki, T, Takahashi, F, Takasaki, N, Tamura, J, Tanaka, M, Tanaka, G N, Taylor, Y, Teramoto, S, Tokuda, M, Tomoto, T, Tomura, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, Y, Unno, S, Uno, Y, Ushiroda, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, M, Yokoyama, Y, Yuan, Y, Yusa, Z P, Zhang, V, Zhilich, and D, Zontar
Abstract: We present a measurement of the B0-Bmacr;(0) mixing parameter Deltam(d) using neutral B meson pairs in a 29.1 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We exclusively reconstruct one neutral B meson in the semileptonic B0--D(*-)l(+)nu decay mode and identify the flavor of the accompanying B meson from its decay products. From the distribution of the time intervals between the two flavor-tagged B meson decay points, we obtain Deltam(d)=(0.494+/-0.012+/-0.015) ps(-1), where the first error is statistical and the second error is systematic.
Published: 2002

21. Observation of B+/- --omegaK+/- decay

Author: R-S, Lu, K, Abe, N, Abe, R, Abe, T, Abe, I, Adachi, H, Aihara, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, E, Banas, I, Bedny, P K, Behera, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, B C K, Casey, M-C, Chang, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, M, Danilov, L Y, Dong, A, Drutskoy, S, Eidelman, V, Eiges, C W, Everton, C, Fukunaga, N, Gabyshev, T, Gershon, B, Golob, A, Gordon, R, Guo, J, Haba, T, Hara, Y, Harada, H, Hayashii, M, Hazumi, E M, Heenan, T, Higuchi, L, Hinz, T, Hokuue, Y, Hoshi, W-S, Hou, S-C, Hsu, H-C, Huang, T, Igaki, Y, Igarashi, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, H, Iwasaki, Y, Iwasaki, H K, Jang, J H, Kang, P, Kapusta, S U, Kataoka, N, Katayama, H, Kawai, Y, Kawakami, N, Kawamura, T, Kawasaki, H, Kichimi, D W, Kim, Heejong, Kim, H J, Kim, H O, Kim, Hyunwoo, Kim, S K, Kim, K, Kinoshita, P, Krokovny, R, Kulasiri, S, Kumar, A, Kuzmin, Y-J, Kwon, G, Leder, S H, Lee, J, Li, D, Liventsev, J, MacNaughton, G, Majumder, F, Mandl, T, Matsuishi, S, Matsumoto, T, Matsumoto, W, Mitaroff, K, Miyabayashi, Y, Miyabayashi, H, Miyake, H, Miyata, G R, Moloney, T, Mori, A, Murakami, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, M, Nakao, J W, Nam, Z, Natkaniec, K, Neichi, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, F, Ohno, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, H, Palka, C W, Park, H, Park, L S, Peak, J-P, Perroud, M, Peters, L E, Piilonen, N, Root, K, Rybicki, H, Sagawa, S, Saitoh, Y, Sakai, M, Satapathy, A, Satpathy, O, Schneider, S, Schrenk, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, V, Sidorov, J B, Singh, N, Soni, S, Stanic, M, Staric, A, Sugi, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, T, Takahashi, F, Takasaki, K, Tamai, N, Tamura, J, Tanaka, M, Tanaka, G N, Taylor, Y, Teramoto, S, Tokuda, M, Tomoto, T, Tomura, S N, Tovey, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, S, Uno, Y, Ushiroda, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, Y, Yamashita, M, Yamauchi, P, Yeh, Y, Yuan, J, Zhang, Z P, Zhang, Y, Zheng, and D, Zontar
Abstract: We report the first observation of the charmless two-body mode B+/---omegaK+/- decay, and a new measurement of the branching fraction for the B+/---omegapi(+/-) decay. The measured branching fractions are B(B+/---omegaK+/-)=(9.2(+2.6)(-2.3)+/-1.0)x10(-6) and B(B+/---omegapi(+/-))=(4.2(+2.0)(-1.8)+/-0.5)x10(-6). We also measure the partial rate asymmetry of B+/---omegaK+/- decays and obtain A(CP)=-0.21+/-0.28+/-0.03. The results are based on a data sample of 29.4 fb(-1) collected on the Upsilon(4S) resonance by the Belle detector at the KEKB e(+)e(-) collider.
Published: 2002

22. Studies of the decay B+/- --D(CP)K+

Author: K, Abe, N, Abe, R, Abe, T, Abe, Byoung Sup, Ahn, H, Aihara, M, Akatsu, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, P K, Behera, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, B C K, Casey, M-C, Chang, P, Chang, Y, Chao, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, M, Danilov, L Y, Dong, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, F, Fang, H, Fujii, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, B, Golob, A, Gordon, R, Guo, J, Haba, T, Hara, Y, Harada, H, Hayashii, M, Hazumi, E M, Heenan, I, Higuchi, T, Higuchi, L, Hinz, T, Hokuue, Y, Hoshi, S R, Hou, W-S, Hou, S-C, Hsu, H-C, Huang, T, Igaki, Y, Igarashi, T, Iijima, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, H, Iwasaki, Y, Iwasaki, H K, Jang, J H, Kang, J S, Kang, N, Katayama, Y, Kawakami, N, Kawamura, T, Kawasaki, H, Kichimi, D W, Kim, Heejong, Kim, H J, Kim, H O, Kim, Hyunwoo, Kim, S K, Kim, T H, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, S, Kumar, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, J, Li, A, Limosani, D, Liventsev, R-S, Lu, J, MacNaughton, G, Majumder, F, Mandl, D, Marlow, T, Matsuishi, S, Matsumoto, T, Matsumoto, W, Mitaroff, K, Miyabayashi, Y, Miyabayashi, H, Miyake, H, Miyata, G R, Moloney, T, Mori, A, Murakami, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, M, Nakao, J W, Nam, Z, Natkaniec, K, Neichi, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, W, Ostrowicz, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, L S, Peak, J-P, Perroud, M, Peters, L E, Piilonen, J L, Rodriguez, F J, Ronga, N, Root, M, Rozanska, K, Rybicki, H, Sagawa, S, Saitoh, Y, Sakai, M, Satapathy, A, Satpathy, O, Schneider, S, Schrenk, C, Schwanda, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, S, Stanic, M, Staric, A, Sugi, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, S Y, Suzuki, S K, Swain, T, Takahashi, F, Takasaki, K, Tamai, N, Tamura, J, Tanaka, M, Tanaka, G N, Taylor, Y, Teramoto, S, Tokuda, S N, Tovey, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, Y, Unno, S, Uno, Y, Ushiroda, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, P, Yeh, Y, Yuan, Y, Yusa, J, Zhang, Z P, Zhang, Y, Zheng, V, Zhilich, and D, Zontar
Abstract: We report studies of the Cabibbo-suppressed decay B+/---D(CP)K+/-, where D(CP) denotes CP eigenstates of the D0-D0; system. The analysis is based on a 29.1 fb(-1) sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric e(+)e(-) storage ring. We measure ratios of branching fractions, relative to Cabibbo-favored B+/---D(CP)pi(+/-), of B(B---D1K-)/B(B---D1pi(-))=0.125+/-0.036+/-0.010 and B(B---D2K-)/B(B---D2pi(-))=0.119+/-0.028+/-0.006; the index 1 (2) denotes the CP=+1 (-1) eigenstate. We also extract the partial rate asymmetries for B+/---D(CP)K+/-, finding A(1)=0.29+/-0.26+/-0.05 and A(2)=-0.22+/-0.24+/-0.04.
Published: 2002

23. Observation of the decay B(0)--D(+/-)D(*-/+)

Author: Heejong Kim, J. Kaneko, J. Tanaka, Kazuo Abe, B. D. Yabsley, J. S. Kang, Y. Asano, P. Kapusta, S. Tokuda, Z. Natkaniec, P. Krokovny, Y. Watanabe, S.N. Tovey, H. Kichimi, J. B. Singh, S. L. Olsen, H. Ozaki, S. K. Choi, K. Neichi, T. Tsuboyama, S. H. Lee, Y. Ushiroda, R. Guo, N. Gabyshev, You-Jin Yuan, N. Tamura, T. Aushev, Takuya Higuchi, M. Danilov, S. Okuno, W. Ostrowicz, P. Chang, T. J. Gershon, T. Iijima, T. Nakadaira, Jie Zhang, Y. Teramoto, F. Handa, T. Igaki, K. Senyo, Elzbieta Banas, K. Ueno, S. Stanič, V.A. Sidorov, S. R. Hou, E. Nakano, T. E. Browder, T. Hara, T. Tsukamoto, Y. J. Kwon, Hiroaki Aihara, N.I. Root, K. Tamai, H. O. Kim, M. E. Sevior, A. Yamaguchi, J. W. Nam, Hyun Woo Kim, C. W. Park, M. Iwamoto, D. Liventsev, S. Uno, C. Schwanda, Y. Iwasaki, T. Hojo, S. Nishida, Y. Kawakami, D. Žontar, S. Matsumoto, R. Itoh, Gobinda Majumder, Hiroyuki Iwasaki, M. Yamauchi, Y. Choi, R. Abe, M. Satapathy, J. Yashima, G. S. Varner, E. M. Heenan, P. Pakhlov, Sadaharu Uehara, A. Satpathy, T. Hokuue, T. Nozaki, J. P. Perroud, Masashi Yokoyama, G. R. Moloney, V. M. Aulchenko, H. Park, Y. Ban, A. Bozek, C. H. Wang, Y. Yusa, Y. Sakai, A. Drutskoy, D. W. Kim, T. Tomura, M. Nakao, A. Garmash, K. Trabelsi, H. Kawai, Byung Gu Cheon, Y. Yamashita, Chikara Fukunaga, Yasushi Nagasaka, I. Bedny, J. Li, C. C. Wang, S. Schrenk, T. Nagamine, H. C. Huang, Ascelin Gordon, L. Y. Dong, F. Ohno, Y. Hoshi, E. Won, H. Sagawa, B. Golob, J. S. Lange, H. Shibuya, V. Eiges, L. E. Piilonen, R. Kulasiri, T. Kawasaki, H. Miyata, R. Chistov, A. Ishikawa, A. Bay, F. Takasaki, Alexander Bondar, F. J. Ronga, Y. Yamada, A. Sugiyama, Semen Eidelman, T. Sumiyoshi, Takayoshi Ohshima, K. E. Varvell, A. M. Bakich, Y. Chao, N. Katayama, S. E. Vahsen, A. Sugi, H. Fujii, S. Ogawa, V.N. Zhilich, O. Schneider, S. Semenov, L. S. Peak, S. K. Swain, K. Rybicki, K. Miyabayashi, S. Korpar, Jolanta Brodzicka, M. H. Tanaka, S. K. Kim, Yuji Enari, M. Starič, Z. P. Zhang, T. Matsumoto, O. Nitoh, K. Kinoshita, Y. Unno, Hyunyong Kim, S. Saitoh, G. N. Taylor, H. Hayashii, J. MacNaughton, T. Mori, H. Yanai, W. S. Hou, T. Abe, S. Y. Suzuki, K. Sumisawa, L. Hinz, A. Kuzmin, Masashi Hazumi, J. H. Kang, H. Miyake, Prafulla Kumar Behera, T.H. Kim, and M. Akatsu
Subjects: Physics, KEKB, Pion, Meson, Analytical chemistry, General Physics and Astronomy, Resonance, Reconstruction method, High Energy Physics - Experiment
Abstract: We report the first observation of the decay B^0->D+-D*-+ with the Belle detector at the KEKB e^+e^- collider operated at the Upsilon(4S) resonance. The sum of branching fractions B(B^0->D+D*-)+B(B^0->D-D*+) is measured to be (1.17+-0.26+0.22-0.25)x10^-3 using the full reconstruction method where both charmed mesons from B^0 decays are reconstructed. A consistent value ((1.48+-0.38+0.28-0.31)x10^-3) is obtained using a partial reconstruction technique that only uses the slow pion from the D*- ->bar D^0pi- decay and a fully reconstructed D+ to reconstruct the B^0., Comment: 10 pages, 3 figures
Published: 2002

24. Observation of double cć production in e+e- annihilation at squareroot[s] approximately 10.6 GeV

Author: K, Abe, R, Abe, T, Abe, I, Adachi, Byoung Sup, Ahn, H, Aihara, M, Akatsu, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, E, Banas, W, Bartel, A, Bay, P K, Behera, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, B C K, Casey, P, Chang, Y, Chao, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, M, Danilov, L Y, Dong, J, Dragic, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, A, Gordon, R, Guo, F, Handa, T, Hara, Y, Harada, N C, Hastings, H, Hayashii, M, Hazumi, E M, Heenan, I, Higuchi, T, Higuchi, T, Hojo, T, Hokuue, Y, Hoshi, K, Hoshina, S R, Hou, W-S, Hou, H-C, Huang, T, Igaki, Y, Igarashi, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, M, Iwamoto, H, Iwasaki, Y, Iwasaki, H K, Jang, J, Kaneko, J H, Kang, J S, Kang, P, Kapusta, N, Katayama, H, Kawai, Y, Kawakami, N, Kawamura, T, Kawasaki, H, Kichimi, D W, Kim, Heejong, Kim, H J, Kim, H O, Kim, Hyunwoo, Kim, S K, Kim, T H, Kim, K, Kinoshita, P, Krokovny, R, Kulasiri, S, Kumar, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, J, Li, D, Liventsev, R-S, Lu, J, MacNaughton, G, Majumder, F, Mandl, S, Matsumoto, T, Matsumoto, H, Miyake, H, Miyata, G R, Moloney, T, Mori, T, Nagamine, Y, Nagasaka, E, Nakano, M, Nakao, J W, Nam, Z, Natkaniec, K, Neichi, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, F, Ohno, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, W, Ostrowicz, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, K S, Park, L S, Peak, J-P, Perroud, M, Peters, L E, Piilonen, N, Root, H, Sagawa, S, Saitoh, Y, Sakai, M, Satapathy, A, Satpathy, O, Schneider, S, Schrenk, C, Schwanda, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, V, Sidorov, J B, Singh, S, Stanic, M, Staric, A, Sugi, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, S K, Swain, T, Takahashi, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, S, Tokuda, T, Tomura, S N, Tovey, W, Trischuk, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, Y, Unno, S, Uno, S E, Vahsen, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, J, Yashima, Y, Yuan, Y, Yusa, Z P, Zhang, V, Zhilich, and D, Zontar
Abstract: We report the observation of prompt J/psi via double cc; production from the e+e- continuum. In this process one cc; pair fragments into a J/psi meson while the remaining pair either produces a charmonium state or fragments into open charm. Both cases have been experimentally observed. We find cross sections of sigma[e+e- --J/psieta(c)(gamma)]xB(eta(c)--or=4 charged)=(0.033(+0.007)(-0.006)+/-0.009) pb and sigma(e+e- --J/psiD(*+)X)=(0.53(+0.19)(-0.15)+/-0.14) pb and infer sigma(e+e- --J/psicc;)/sigma(e+e- --J/psiX)=0.59(+0.15)(-0.13)+/-0.12. These results are obtained from a 46.2 fb(-1) data sample collected near the Upsilon(4S) resonance, with the Belle detector at the KEKB collider.
Published: 2002

25. Observation of B(0)--D((*)0)pp

Author: K, Abe, R, Abe, T, Abe, Byoung Sup, Ahn, H, Aihara, M, Akatsu, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, E, Banas, A, Bay, I, Bedny, P K, Behera, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, B C K, Casey, P, Chang, Y, Chao, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, M, Danilov, L Y, Dong, J, Dragic, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, F, Fang, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, A, Gordon, R, Guo, F, Handa, T, Hara, Y, Harada, N C, Hastings, H, Hayashii, M, Hazumi, E M, Heenan, I, Higuchi, T, Higuchi, T, Hojo, T, Hokune, Y, Hoshi, K, Hoshina, S R, Hou, W-S, Hou, S-C, Hsu, H-C, Huang, T, Igaki, Y, Igarashi, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, H, Iwasaki, Y, Iwasaki, H K, Jang, J, Kaneko, J H, Kang, J S, Kang, P, Kapusta, N, Katayama, H, Kawai, Y, Kawakami, N, Kawamura, T, Kawasaki, H, Kichimi, D W, Kim, Heejong, Kim, H J, Kim, H O, Kim, Hyunwoo, Kim, S K, Kim, T H, Kim, K, Kinoshita, S, Korpar, P, Krokovny, R, Kulasiri, S, Kumar, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, J, Li, D, Liventsev, R-S, Lu, J, MacNaughton, G, Majumder, F, Mandl, S, Matsumoto, K, Miyabayashi, H, Miyake, H, Miyata, G R, Moloney, T, Mori, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, M, Nakao, J W, Nam, Z, Natkaniec, K, Neichi, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, F, Ohno, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, W, Ostrowicz, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, K S, Park, L S, Peak, J-P, Perroud, M, Peters, L E, Piilonen, N, Root, M, Rozanska, K, Rybicki, H, Sagawa, S, Saitoh, Y, Sakai, H, Sakamoto, M, Satapathy, A, Satpathy, O, Schneider, S, Schrenk, C, Schwanda, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, S, Stanic, M, Staric, A, Sugi, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, S K, Swain, T, Takahashi, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, S, Tokuda, T, Tomura, S N, Tovey, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, Y, Unno, S, Uno, S E, Vahsen, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, J, Yashima, Y, Yuan, J, Zhang, Z P, Zhang, V, Zhilich, and D, Zontar
Abstract: The B meson decay modes B--Dpp; and B--D(*)pp; have been studied using 29.4 fb(-1) of data collected with the Belle detector at KEKB. The B;(0)--D(0)pp; and B;(0)--D(*0)pp; decays have been observed for the first time with branching fractions B(B;(0)--D(0)pp;)=(1.18+/-0.15+/-0.16)x10(-4) and B(B;(0)--D(*0)pp;)=(1.20(+0.33)(-0.29)+/-0.21)x10(-4). No signal has been found for the B+--D(+)pp; and B+--D(*+)pp; decay modes, and the corresponding upper limits at 90% C.L. are presented.
Published: 2002

26. Radiative B meson decays into kpigamma and kpipigamma final states

Author: S, Nishida, M, Nakao, K, Abe, T, Abe, Byoung Sup, Ahn, H, Aihara, M, Akatsu, Y, Asano, T, Aushev, A M, Bakich, Y, Ban, E, Banas, W, Bartel, A, Bay, I, Bedny, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, B C K, Casey, P, Chang, Y, Chao, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, M, Danilov, L Y, Dong, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, C, Fukunaga, N, Gabyshev, T, Gershon, A, Gordon, K, Gotow, R, Guo, J, Haba, T, Hara, H, Hayashii, M, Hazumi, E M, Heenan, I, Higuchi, T, Higuchi, T, Hojo, T, Hokuue, Y, Hoshi, S R, Hou, W-S, Hou, S-C, Hsu, H-C, Huang, T, Igaki, T, Iijima, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, M, Iwamoto, H, Iwasaki, Y, Iwasaki, P, Jalocha, H K, Jang, J H, Kang, P, Kapusta, S U, Kataoka, N, Katayama, H, Kawai, Y, Kawakami, N, Kawamura, T, Kawasaki, H, Kichimi, D W, Kim, Heejong, Kim, H J, Kim, H O, Kim, Hyunwoo, Kim, T H, Kim, K, Kinoshita, P, Krizan, P, Krokovny, R, Kulasiri, S, Kumar, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, J, Li, R-S, Lu, J, MacNaughton, G, Majumder, F, Mandl, S, Matsumoto, T, Matsumoto, Y, Mikami, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, G R, Moloney, S, Mori, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, J W, Nam, Z, Natkaniec, K, Neichi, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, F, Ohno, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, K S, Park, L S, Peak, J-P, Perroud, M, Peters, L E, Piilonen, M, Rozanska, K, Rybicki, H, Sagawa, S, Saitoh, Y, Sakai, H, Sakamoto, M, Satapathy, A, Satpathy, O, Schneider, S, Schrenk, C, Schwanda, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, S, Stanic, A, Sugi, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, T, Takahashi, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, S, Tokuda, M, Tomoto, T, Tomura, S N, Tovey, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, S, Uno, Y, Ushiroda, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, H, Yamamoto, Y, Yamashita, M, Yamauchi, Y, Yuan, Y, Yusa, J, Zhang, Z P, Zhang, V, Zhilich, and D, Zontar
Abstract: We report observations of radiative B meson decays into the K+pi(-)gamma and K+pi(-)pi(+)gamma final states. In the B0--K+pi(-)gamma channel, we present evidence for decays via an intermediate tensor meson state with a branching fraction of B(B0--K(*)(2)(1430)(0)gamma)=[1.3+/-0.5(stat)+/-0.1(syst)]x10(-5). We measure the branching fraction B(B+--K+pi(-)pi(+)gamma)=[2.4+/-0.5(stat) +0.4-0.2(syst)]x10(-5), in which the B+--K(*0)pi(+)gamma and B+--K+rho(0)gamma channels dominate. The analysis is based on a data set of 29.4 fb(-1) recorded by the Belle experiment at the KEKB collider.
Published: 2002

27. Observation of B(+/-) --p(-)pK(+/-)

Author: K, Abe, R, Abe, T, Abe, I, Adachi, Byoung Sup, Ahn, H, Aihara, M, Akatsu, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, E, Banas, S, Behari, P K, Behera, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, B C K, Casey, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, M, Danilov, L Y, Dong, J, Dragic, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, C W, Everton, F, Fang, H, Fujii, C, Fukunaga, M, Fukushima, N, Gabyshev, A, Garmash, T, Gershon, K, Gotow, R, Guo, J, Haba, H, Hamasaki, F, Handa, K, Hara, T, Hara, H, Hayashii, M, Hazumi, E M, Heenan, I, Higuchi, T, Higuchi, T, Hojo, T, Hokuue, Y, Hoshi, S R, Hou, W-S, Hou, H-C, Huang, T, Igaki, Y, Igarashi, T, Iijima, H, Ikeda, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, H, Iwasaki, Y, Iwasaki, P, Jalocha, H K, Jang, J H, Kang, J S, Kang, P, Kapusta, N, Katayama, H, Kawai, Y, Kawakami, N, Kawamura, T, Kawasaki, H, Kichimi, D W, Kim, H J, Kim, H O, Kim, Hyunwoo, Kim, S K, Kim, K, Kinoshita, H, Konishi, S, Korpar, P, Krizan, P, Krokovny, S, Kumar, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, A, Limosani, D, Liventsev, R-S, Lu, J, MacNaughton, G, Majumder, F, Mandl, T, Matsuishi, S, Matsumoto, Y, Mikami, W, Mitaroff, K, Miyabayashi, Y, Miyabayashi, H, Miyake, H, Miyata, G R, Moloney, T, Nagamine, Y, Nagasaka, Y, Nagashima, M, Nakao, J W, Nam, Z, Natkaniec, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, P, Pakhlov, H, Palka, C S, Park, C W, Park, K S, Park, L S, Peak, J-P, Perroud, M, Peters, L E, Piilonen, F, Ronga, N, Root, K, Rybicki, H, Sagawa, Y, Sakai, H, Sakamoto, M, Satapathy, A, Satpathy, O, Schneider, S, Schrenk, C, Schwanda, S, Semenov, K, Senyo, H, Shibuya, B, Schwartz, V, Sidorov, J B, Singh, S, Stanic, A, Sugi, A, Sugiyama, K, Sumisawa, K, Suzuki, S Y, Suzuki, T, Takahashi, F, Takasaki, M, Takita, K, Tamai, N, Tamura, J, Tanaka, G N, Taylor, Y, Teramoto, S, Tokuda, T, Tomura, S N, Tovey, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, Y, Unno, S, Uno, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, M, Yamaga, A, Yamaguchi, H, Yamamoto, Y, Yamashita, M, Yamauchi, S, Yanaka, P, Yeh, M, Yokoyama, Y, Yuan, J, Zhang, Y, Zheng, and D, Zontar
Abstract: We report the observation of the decay mode B(+/-) --p(-)pK(+/-)based on an analysis of 29.4 fb(-1) of data collected by the Belle detector at KEKB. This is the first example of a b--s transition with baryons in the final state. The p(-)p mass spectrum in this decay is inconsistent with phase space and is peaked at low mass. The branching fraction for this decay is measured to be B(B+/---p(-)pK+/-) = [4.3(+1.1)(-0.9)(stat)+/-0.5(syst)]x 10(-6). We also report upper limits for the decays B(0)--p(-)pK(S) and B(+/-)--p(-)p pi(+/-).
Published: 2002

28. Observation of LargeCPViolation in the NeutralBMeson System

Author: K. Abe, R. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, G. Alimonti, K. Asai, M. Asai, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, E. Banas, S. Behari, P. K. Behera, D. Beiline, A. Bondar, A. Bozek, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, R. Enomoto, C. W. Everton, F. Fang, H. Fujii, C. Fukunaga, M. Fukushima, N. Gabyshev, A. Garmash, T. J. Gershon, A. Gordon, K. Gotow, H. Guler, R. Guo, J. Haba, H. Hamasaki, K. Hanagaki, F. Handa, K. Hara, T. Hara, N. C. Hastings, H. Hayashii, M. Hazumi, E. M. Heenan, Y. Higasino, I. Higuchi, T. Higuchi, T. Hirai, H. Hirano, T. Hojo, T. Hokuue, Y. Hoshi, K. Hoshina, S. R. Hou, W.-S. Hou, S.-C. Hsu, H.-C. Huang, Y. Igarashi, T. Iijima, H. Ikeda, K. Ikeda, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, G. Iwai, H. Iwasaki, Y. Iwasaki, D. J. Jackson, P. Jalocha, H. K. Jang, M. Jones, R. Kagan, H. Kakuno, J. Kaneko, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, Hyunwoo Kim, S. K. Kim, T. H. Kim, K. Kinoshita, S. Kobayashi, S. Koishi, H. Konishi, K. Korotushenko, P. Krokovny, R. Kulasiri, S. Kumar, T. Kuniya, E. Kurihara, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, M. H. Lee, S. H. Lee, C. Leonidopoulos, Y.-S. Lin, D. Liventsev, R.-S. Lu, J. MacNaughton, D. Marlow, T. Matsubara, S. Matsui, S. Matsumoto, T. Matsumoto, Y. Mikami, K. Misono, K. Miyabayashi, H. Miyake, H. Miyata, L. C. Moffitt, G. R. Moloney, G. F. Moorhead, S. Mori, T. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, Y. Nagashima, T. Nakadaira, T. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, Y. Ohshima, T. Okabe, T. Okazaki, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, H. Palka, C. S. Park, C. W. Park, H. Park, L. S. Peak, M. Peters, L. E. Piilonen, E. Prebys, J. L. Rodriguez, N. Root, M. Rozanska, K. Rybicki, J. Ryuko, H. Sagawa, Y. Sakai, H. Sakamoto, M. Satapathy, A. Satpathy, S. Schrenk, S. Semenov, K. Senyo, Y. Settai, M. E. Sevior, H. Shibuya, B. Shwartz, A. Sidorov, S. Stanič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, J.-I. Suzuki, K. Suzuki, S. Suzuki, S. Y. Suzuki, S. K. Swain, H. Tajima, T. Takahashi, F. Takasaki, M. Takita, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, M. Tomoto, T. Tomura, S. N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, S. E. Vahsen, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, M. Yamaga, A. Yamaguchi, H. Yamamoto, T. Yamanaka, Y. Yamashita, M. Yamauchi, S. Yanaka, J. Yashima, M. Yokoyama, K. Yoshida, Y. Yusa, H. Yuta, C. C. Zhang, J. Zhang, H. W. Zhao, Y. Zheng, V. Zhilich, and D. Žontar
Subjects: Physics, Particle physics, KEKB, Meson, Electron–positron annihilation, General Physics and Astronomy, CP violation, Resonance, High Energy Physics::Experiment, B meson, Standard Model
Abstract: We present a measurement of the standard model $\mathrm{CP}$ violation parameter $\mathrm{sin}2{\ensuremath{\varphi}}_{1}$ based on a $29.1{\mathrm{fb}}^{\ensuremath{-}1}$ data sample collected at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. One neutral $B$ meson is fully reconstructed as a $J/\ensuremath{\psi}{K}_{S}$, $\ensuremath{\psi}(2S){K}_{S}$, ${\ensuremath{\chi}}_{c1}{K}_{S}$, ${\ensuremath{\eta}}_{c}{K}_{S}$, $J/\ensuremath{\psi}{K}_{L}$, or $J/\ensuremath{\psi}{K}^{*0}$ decay and the flavor of the accompanying $B$ meson is identified from its decay products. From the asymmetry in the distribution of the time intervals between the two $B$ meson decay points, we determine $\mathrm{sin}2{\ensuremath{\varphi}}_{1}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.99\ifmmode\pm\else\textpm\fi{}0.14(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.06(\mathrm{syst})$. We conclude that we have observed $\mathrm{CP}$ violation in the neutral $B$ meson system.
Published: 2001
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29. Quadrupole Stabilization of then=2Rotational Instability of a Field-Reversed Theta-Pinch Plasma

Author: M. Tanjyo, S. Ohi, Hiroshi Ito, Shigefumi Okada, Yukishige Ito, T. Minato, Seishiro Goto, Tsutomu Ishimura, Y. Kawakami, and M. Kako
Subjects: Physics, Two-stream instability, Field (physics), Quadrupole, Pinch, General Physics and Astronomy, Electron temperature, Atomic physics, Threshold energy, Instability, Geomagnetic reversal
Abstract: The n = 2 rotational instability is the most dangerous gross instability in a field-reversed theta pinch. It is demonstrated for the first time that the instability is completely suppressed by superposing a quadrupole field which is much smaller than the axial confinement field at the separatrix. The experimental threshold intensity of the field for stabilization is about 2.5 times less than that predicted by theoretical stability analysis.
Published: 1983
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30. Observation of B(0)-->D((*)0)pp.

Author: Abe K, Abe K, Abe R, Abe T, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bay A, Bedny I, Behera PK, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Casey BC, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Danilov M, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fang F, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Gordon A, Guo R, Handa F, Hara T, Harada Y, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hojo T, Hokune T, Hoshi Y, Hoshina K, Hou SR, Hou WS, Hsu SC, Huang HC, Igaki T, Igarashi Y, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki H, Iwasaki Y, Jang HK, Kaneko J, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Korpar S, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SH, Li J, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Matsumoto S, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Park KS, Peak LS, Perroud JP, Peters M, Piilonen LE, Root N, Rozanska M, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Sakamoto H, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Seuster R, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Swain SK, Takahashi T, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Vahsen SE, Varner G, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yashima J, Yuan Y, Zhang J, Zhang ZP, Zhilich V, and Zontar D
Abstract: The B meson decay modes B-->Dpp; and B-->D(*)pp; have been studied using 29.4 fb(-1) of data collected with the Belle detector at KEKB. The B;(0)-->D(0)pp; and B;(0)-->D(*0)pp; decays have been observed for the first time with branching fractions B(B;(0)-->D(0)pp;)=(1.18+/-0.15+/-0.16)x10(-4) and B(B;(0)-->D(*0)pp;)=(1.20(+0.33)(-0.29)+/-0.21)x10(-4). No signal has been found for the B+-->D(+)pp; and B+-->D(*+)pp; decay modes, and the corresponding upper limits at 90% C.L. are presented.
Published: 2002
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31. Observation of the decay B(0)-->D(+/-)D(*-/+).

Author: Abe K, Abe R, Abe T, Aihara H, Akatsu M, Asano Y, Aulchenko V, Aushev T, Bakich AM, Ban Y, Banas E, Bay A, Bedny I, Behera PK, Bondar A, Bozek A, Brodzicka J, Browder TE, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Danilov M, Dong LY, Drutskoy A, Eidelman S, Eiges V, Enari Y, Fujii H, Fukunaga C, Gabyshev N, Garmash A, Gershon T, Golob B, Gordon A, Guo R, Handa F, Hara T, Hayashii H, Hazumi M, Heenan EM, Higuchi T, Hinz L, Hojo T, Hokuue T, Hoshi Y, Hou SR, Hou WS, Huang HC, Igaki T, Iijima T, Ishikawa A, Itoh R, Iwamoto M, Iwasaki H, Iwasaki Y, Kaneko J, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawakami Y, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Korpar S, Krokovny P, Kulasiri R, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Li J, Liventsev D, MacNaughton J, Majumder G, Matsumoto S, Matsumoto T, Miyabayashi K, Miyake H, Miyata H, Moloney GR, Mori T, Nagamine T, Nagasaka Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Park CW, Park H, Peak LS, Perroud JP, Piilonen LE, Ronga FJ, Root N, Rybicki K, Sagawa H, Saitoh S, Sakai Y, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Sevior ME, Shibuya H, Sidorov V, Singh JB, Stanic S, Staric M, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki S, Suzuki SY, Swain SK, Takasaki F, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Vahsen SE, Varner G, Varvell KE, Wang CC, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaguchi A, Yamashita Y, Yamauchi M, Yanai H, Yashima J, Yokoyama M, Yuan Y, Yusa Y, Zhang J, Zhang ZP, Zhilich V, and Zontar D
Abstract: We report the first observation of the decay B(0)-->D(+/-)D(*-/+) with the Belle detector at the KEKB e(+)e(-) Collider operated at the Upsilon(4S) resonance. The sum of branching fractions B(B(0)-->D(+)D(*-))+B(B(0)-->D(-)D(*+)) is measured to be (1.17+/-0.26(+0.22)(-0.25))x10(-3) using the full reconstruction method where both charmed mesons from B0 decays are reconstructed. A consistent value [(1.48+/-0.38(+0.28)(-0.31))x10(-3)] is obtained using a partial reconstruction technique that uses only the slow pion from the D(*-)-->D(-0)pi(-) decay and a fully reconstructed D(+) to reconstruct the B(0).
Published: 2002
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32. Precise measurement of B meson lifetimes with hadronic decay final states.

Author: Abe K, Abe K, Abe R, Abe T, Adachi I, Ahn BS, Aihara H, Akatsu M, Asano Y, Aso T, Aushev T, Bakich AM, Ban Y, Banas E, Behari S, Behera PK, Bondar A, Bozek A, Brodzicka J, Browder TE, Casey BC, Chang P, Chao Y, Cheon BG, Chistov R, Choi SK, Choi Y, Dong LY, Dragic J, Drutskoy A, Eidelman S, Eiges V, Enari Y, Everton CW, Fang F, Fujii H, Fukunaga C, Fukushima M, Gabyshev N, Garmash A, Gershon T, Gordon A, Guler H, Guo R, Haba J, Hamasaki H, Hanagaki K, Handa F, Hara K, Hara T, Hastings NC, Hayashii H, Hazumi M, Heenan EM, Higuchi I, Higuchi T, Hokuue T, Hoshi Y, Hou SR, Hou WS, Hsu SC, Huang HC, Igaki T, Igarashi Y, Iijima T, Ikeda H, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki H, Iwasaki Y, Jang HK, Kang JH, Kang JS, Kapusta P, Katayama N, Kawai H, Kawai H, Kawakami Y, Kawamura N, Kawasaki T, Kichimi H, Kim DW, Kim H, Kim HJ, Kim HO, Kim H, Kim SK, Kim TH, Kinoshita K, Konishi H, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar S, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Limosani A, Liventsev D, Lu RS, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsubara T, Matsuishi T, Matsumoto S, Matsumoto T, Mikami Y, Mitaroff W, Miyabayashi K, Miyabayashi Y, Miyake H, Miyata H, Moloney GR, Mori S, Mori T, Nagamine T, Nagasaka Y, Nagashima Y, Nakadaira T, Nakano E, Nakao M, Nam JW, Natkaniec Z, Neichi K, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohno F, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Park CS, Park CW, Park H, Park KS, Peak LS, Perroud JP, Peters M, Piilonen LE, Rodriguez JL, Ronga F, Rozanska M, Rybicki K, Sagawa H, Sakai Y, Satapathy M, Satpathy A, Schneider O, Schrenk S, Schwanda C, Semenov S, Senyo K, Sevior ME, Shibuya H, Shwartz B, Sidorov V, Singh JB, Stanic S, Sugi A, Sugiyama A, Sumisawa K, Sumiyoshi T, Suzuki K, Suzuki S, Suzuki SY, Tajima H, Takahashi T, Takasaki F, Takita M, Tamai K, Tamura N, Tanaka J, Tanaka M, Taylor GN, Teramoto Y, Tokuda S, Tomoto M, Tomura T, Tovey SN, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Unno Y, Uno S, Ushiroda Y, Varvell KE, Wang CC, Wang CH, Wang JG, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamada Y, Yamaga M, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yanaka S, Yashima J, Yokoyama M, Yuan Y, Yusa Y, Zhang CC, Zhang J, Zheng Y, Zhilich V, and Zontar D
Abstract: The lifetimes of the B(0) and B- mesons are extracted from 29.1 fb(-1) of data collected with the Belle detector at the KEK B factory. A fit to the decay length differences of neutral and charged B meson pairs, measured in events where one of the B mesons is fully reconstructed in several hadronic modes, yields tau(B(0)) = 1.554+/-0.030(stat)+/-0.019(syst) ps, tau(B-) = 1.695+/-0.026(stat)+/-0.015(syst) ps, and tau(B-)/tau(B(0)) = 1.091+/-0.023(stat)+/-0.014(syst).
Published: 2002
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32 results on '"Y. Kawakami"'

1. Early-Stage Dynamics of Light-Matter Interaction Leading to the Insulator-to-Metal Transition in a Charge Ordered Organic Crystal

2. Optical Modulation of Effective On-Site Coulomb Energy for the Mott Transition in an Organic Dimer Insulator

3. Photoinduced Melting of a Stripe-Type Charge-Order and Metallic Domain Formation in a Layered BEDT-TTF-Based Organic Salt

4. Evidence for DirectCPViolation inB0→K+π−Decays

5. Evidence forB0→π0π0

6. Observation ofB¯0→D0K¯0andB¯0→D0K¯*0Decays

7. Studies of the DecayB±→DCPK±

8. Measurement of Branching Fractions forB→ηcK(*)Decays

9. Measurement of the Electroweak Penguin ProcessB→Xsℓ+ℓ−

10. Measurement of theB0−B¯0Mixing ParameterΔmdusing SemileptonicB0Decays

11. Observation ofDs+K−and Evidence forDs+π−Final States in NeutralBDecays

12. RadiativeBMeson Decays intoKπγandKππγFinal States

13. Observation ofB±→ωK±Decay

14. Observation of Doublecc¯Production ine+e−Annihilation ats≈10.6 GeV

15. Publisher’s Note: Observation of theηc(2S)in ExclusiveB→KKSK−π+Decays [Phys. Rev. Lett89, 102001 (2002)]

16. Measurement of branching fractions for B--eta(c)K(*) decays

17. Observation of theηc(2S)in ExclusiveB→KKSK−π+Decays

18. Measurement of the electroweak penguin process B--X(s)l+l

19. Observation of D+(s)K- and evidence for D+(s)pi- final states in neutral B decays

20. Measurement of the B(0)-B(0) mixing parameter Deltam(d) using semileptonic B0 decays

21. Observation of B+/- --omegaK+/- decay

22. Studies of the decay B+/- --D(CP)K+

23. Observation of the decay B(0)--D(+/-)D(*-/+)

24. Observation of double cć production in e+e- annihilation at squareroot[s] approximately 10.6 GeV

25. Observation of B(0)--D((*)0)pp

26. Radiative B meson decays into kpigamma and kpipigamma final states

27. Observation of B(+/-) --p(-)pK(+/-)

28. Observation of LargeCPViolation in the NeutralBMeson System

29. Quadrupole Stabilization of then=2Rotational Instability of a Field-Reversed Theta-Pinch Plasma

30. Observation of B(0)-->D((*)0)pp.

31. Observation of the decay B(0)-->D(+/-)D(*-/+).

32. Precise measurement of B meson lifetimes with hadronic decay final states.

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32 results on '"Y. Kawakami"'

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