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55 results on '"T, Iwashita"'

1. Measurement of the τ-lepton lifetime at Belle.

Author

Belous K, Shapkin M, Sokolov A, Adachi I, Aihara H, Asner DM, Aulchenko V, Bakich AM, Bala A, Bhuyan B, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Chistov R, Cho K, Chobanova V, Choi Y, Cinabro D, Dalseno J, Doležal Z, Dutta D, Eidelman S, Epifanov D, Farhat H, Fast JE, Ferber T, Gaur V, Ganguly S, Garmash A, Gillard R, Goh YM, Golob B, Haba J, Hara T, Hayasaka K, Hayashii H, Hoshi Y, Hou WS, Iijima T, Inami K, Ishikawa A, Itoh R, Iwashita T, Jaegle I, Julius T, Kato E, Kichimi H, Kiesling C, Kim DY, Kim HJ, Kim JB, Kim MJ, Kim YJ, Kinoshita K, Ko BR, Kodyš P, Korpar S, Križan P, Krokovny P, Kuhr T, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Libby J, Liventsev D, Lukin P, Matvienko D, Miyata H, Mizuk R, Mohanty GB, Mori T, Mussa R, Nagasaka Y, Nakano E, Nakao M, Nayak M, Nedelkovska E, Ng C, Nisar NK, Nishida S, Nitoh O, Ogawa S, Okuno S, Olsen SL, Ostrowicz W, Pakhlova G, Park CW, Park H, Park HK, Pedlar TK, Pestotnik R, Petrič M, Piilonen LE, Ritter M, Röhrken M, Rostomyan A, Ryu S, Sahoo H, Saito T, Sakai Y, Sandilya S, Santel D, Santelj L, Sanuki T, Savinov V, Schneider O, Schnell G, Schwanda C, Semmler D, Senyo K, Seon O, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Sibidanov A, Simon F, Sohn YS, Stanič S, Starič M, Steder M, Sumiyoshi T, Tamponi U, Tatishvili G, Teramoto Y, Trabelsi K, Tsuboyama T, Uchida M, Uehara S, Uglov T, Unno Y, Uno S, Usov Y, Vahsen SE, Van Hulse C, Vanhoefer P, Varner G, Varvell KE, Vinokurova A, Vorobyev V, Wagner MN, Wang CH, Wang P, Watanabe M, Watanabe Y, Williams KM, Won E, Yamaoka J, Yamashita Y, Yashchenko S, Yook Y, Yuan CZ, Zhang ZP, Zhilich V, and Zupanc A

Subjects
Quantum Theory, Elementary Particles, Models, Theoretical, Nuclear Physics methods
Abstract

The lifetime of the τ lepton is measured using the process e+ e- → τ+ τ- , where both τ leptons decay to 3πν(τ). The result for the mean lifetime, based on 711  fb(-1) of data collected with the Belle detector at the ϒ(4S) resonance and 60  MeV below, is τ=(290.17±0.53(stat)±0.33(syst))×10(-15)  s. The first measurement of the lifetime difference between τ+ and τ- is performed. The upper limit on the relative lifetime difference between positive and negative τ leptons is |Δτ|/τ<7.0×10(-3) at 90% C.L.

Published
2014
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2. Evidence for B- → τ- ν(τ) with a hadronic tagging method using the full data sample of Belle.

Author

Hara K, Horii Y, Iijima T, Adachi I, Aihara H, Asner DM, Aushev T, Aziz T, Bakich AM, Barrett M, Bhardwaj V, Bhuyan B, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder TE, Chekelian V, Chen A, Chen P, Cheon BG, Chilikin K, Cho IS, Cho K, Choi Y, Cinabro D, Dalseno J, Dingfelder J, Doležal Z, Drásal Z, Drutskoy A, Dutta D, Eidelman S, Epifanov D, Esen S, Farhat H, Frey A, Gaur V, Gabyshev N, Ganguly S, Gillard R, Goh YM, Golob B, Haba J, Hara T, Hayasaka K, Hayashii H, Higuchi T, Hoshi Y, Inami K, Ishikawa A, Itoh R, Iwasaki Y, Iwashita T, Julius T, Kang JH, Kawasaki T, Kiesling C, Kim HO, Kim JB, Kim JH, Kim KT, Kim MJ, Kim YJ, Kinoshita K, Klucar J, Ko BR, Kodyš P, Korpar S, Kouzes RT, Križan P, Krokovny P, Kronenbitter B, Kuhr T, Kumita T, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Li J, Li Y, Libby J, Liu C, Liu Y, Liu ZQ, Liventsev D, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Moll A, Mori T, Muramatsu N, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nayak M, Ng C, Nisar NK, Nishida S, Nishimura K, Nitoh O, Nozaki T, Ohshima T, Okuno S, Olsen SL, Oswald C, Ozaki H, Pakhlov P, Pakhlova G, Park CW, Park HK, Pedlar TK, Pestotnik R, Petrič M, Piilonen LE, Prim M, Röhrken M, Ryu S, Sahoo H, Sakai K, Sakai Y, Sandilya S, Santel D, Sanuki T, Sato Y, Schneider O, Schnell G, Schwanda C, Schwartz AJ, Senyo K, Seon O, Sevior ME, Shapkin M, Shen CP, Shibata TA, Shiu JG, Shwartz B, Sibidanov A, Simon F, Smerkol P, Sohn YS, Sokolov A, Solovieva E, Starič M, Sumihama M, Sumiyoshi T, Tatishvili G, Teramoto Y, Trabelsi K, Tsuboyama T, Uchida M, Uehara S, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Van Hulse C, Vanhoefer P, Varner G, Varvell KE, Vorobyev V, Wagner MN, Wang CH, Wang MZ, Wang P, Watanabe M, Watanabe Y, Williams KM, Won E, Yabsley BD, Yamamoto H, Yamashita Y, Yusa Y, Zhang ZP, Zhilich V, Zhulanov V, and Zupanc A

Subjects
Elementary Particles, Nuclear Physics methods, Quantum Theory
Abstract

We measure the branching fraction of B- → τ- ν(τ) using the full Υ(4S) data sample containing 772×10(6) BB pairs collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. Events with BB pairs are tagged by reconstructing one of the B mesons decaying into hadronic final states, and B- → τ- ν(τ) candidates are detected in the recoil. We find evidence for B- → τ- ν(τ) with a significance of 3.0 standard deviations including systematic errors and measure a branching fraction B(B- → τ- ν(τ))=[0.72(-0.25)(+0.27)(stat)±0.11(syst)]×10(-4).

Published
2013
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3. Evidence for the η(b)(2S) and observation of h(b)(1P)→η(b)(1S)γ and h(b)(2P)→η(b)(1S)γ.

Author

Mizuk R, Asner DM, Bondar A, Pedlar TK, Adachi I, Aihara H, Arinstein K, Aulchenko V, Aushev T, Aziz T, Bakich AM, Bay A, Belous K, Bhardwaj V, Bhuyan B, Bischofberger M, Bonvicini G, Bozek A, Bračko M, Brodzicka J, Browder TE, Chekelian V, Chen A, Chen P, Cheon BG, Chilikin K, Chistov R, Cho IS, Cho K, Choi SK, Choi Y, Dalseno J, Danilov M, Doležal Z, Drásal Z, Drutskoy A, Eidelman S, Epifanov D, Fast JE, Gaur V, Gabyshev N, Garmash A, Golob B, Haba J, Hara T, Hayasaka K, Hayashii H, Horii Y, Hoshi Y, Hou WS, Hsiung YB, Hyun HJ, Iijima T, Ishikawa A, Itoh R, Iwabuchi M, Iwasaki Y, Iwashita T, Jaegle I, Julius T, Kang JH, Kapusta P, Kawasaki T, Kim HJ, Kim HO, Kim JH, Kim KT, Kim MJ, Kim YJ, Kinoshita K, Ko BR, Koblitz S, Kodyš P, Korpar S, Kouzes RT, Križan P, Krokovny P, Kuhr T, Kumita T, Kuzmin A, Kwon YJ, Lange JS, Lee SH, Li J, Libby J, Liu C, Liu Y, Liu ZQ, Liventsev D, Louvot R, Matvienko D, McOnie S, Miyabayashi K, Miyata H, Mohanty GB, Mohapatra D, Moll A, Muramatsu N, Mussa R, Nakao M, Natkaniec Z, Ng C, Nishida S, Nishimura K, Nitoh O, Nozaki T, Ohshima T, Okuno S, Olsen SL, Onuki Y, Pakhlov P, Pakhlova G, Park CW, Park H, Pestotnik R, Petrič M, Piilonen LE, Poluektov A, Röhrken M, Sakai Y, Sandilya S, Santel D, Sanuki T, Sato Y, Schneider O, Schwanda C, Senyo K, Seon O, Sevior ME, Shapkin M, Shen CP, Shibata TA, Shiu JG, Shwartz B, Sibidanov A, Simon F, Smerkol P, Sohn YS, Sokolov A, Solovieva E, Stanič S, Starič M, Sumihama M, Sumiyoshi T, Tanida K, Tatishvili G, Teramoto Y, Tikhomirov I, Trabelsi K, Tsuboyama T, Uchida M, Uehara S, Uglov T, Unno Y, Uno S, Vanhoefer P, Varner G, Varvell KE, Vinokurova A, Vorobyev V, Wang CH, Wang MZ, Wang P, Wang XL, Watanabe M, Watanabe Y, Williams KM, Won E, Yabsley BD, Yamaoka J, Yamashita Y, Yuan CZ, Zhang ZP, and Zhilich V

Subjects
Photons, Nuclear Physics methods, Quantum Theory
Abstract

We report the first evidence for the η(b)(2S) using the h(b)(2P)→η(b)(2S)γ transition and the first observation of the h(b)(1P)→η(b)(1S)γ and h(b)(2P)→η(b)(1S)γ transitions. The mass and width of the η(b)(1S) and η(b)(2S) are measured to be m(η(b)(1S))=(9402.4±1.5±1.8) MeV/c(2), m(η(b)(2S))=(9999.0±3.5(-1.9)(+2.8)) MeV/c(2), and Γ(η(b)(1S))=(10.8(-3.7-2.0)(+4.0+4.5)) MeV. We also update the h(b)(1P) and h(b)(2P) mass measurements. We use a 133.4 fb(-1) data sample collected at energies near the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

Published
2012
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4. Search for coherent charged pion production in neutrino-carbon interactions

Author

J. H. Choi, M. M. Khabibullin, Stephane T'Jampens, R. Gran, L. Whitehead, R. L. Helmer, T. Ishida, Katsuki Hiraide, S. Andringa, E. Fernandez, Takaaki Kajita, J. Y. Kim, J. Zalipska, A. Blondel, Shoei Nakayama, R. Terri, A. Ikeda, Y. Totsuka, Y. Takubo, Minoru Yoshida, S. Nawang, O. V. Mineev, C. Mariani, Y. Takeuchi, T. Nakadaira, Federico Sanchez, H. I. Jang, G. Jover, Shinya Yamada, G. Sitjes, T. Hara, Takehisa Hasegawa, K. Ishihara, K. K. Joo, K. McConnel, K. Nishikawa, Jordi Burguet-Castell, P. Novella, J. Hill, N. Tamura, Silvia Borghi, R. Schroeter, H. Yokoyama, F. Pierre, Michael B. Smy, M. Sekiguchi, J.J. Gómez-Cadenas, Y. Takenaga, Masaya Hasegawa, M. Miura, Yuichi Oyama, K. Kaneyuki, J. L. Stone, T. Inagaki, U. Dore, S. B. Kim, Makoto Sakuda, H. C. Bhang, Yu. Kudenko, J. Bouchez, M. Y. Pac, L. Ludovici, W. Wang, Koji Nakamura, Tomoyuki Maruyama, I. S. Jeong, C. Cavata, Itsuo Nakano, J. Argyriades, Toshio Namba, A. N. Khotjantsev, S. Matsuno, Masayuki Nakahata, Taichi Morita, Yasunari Suzuki, T. Kobayashi, T. Kutter, A. K. Ichikawa, H. Maesaka, Yoshitaka Itow, Masaaki Tanaka, A. Sarrat, K. Taki, Ko Okumura, F. Nova, E. J. Jeon, Hiroshi Sato, K. Asakura, P. Kitching, C. W. Walter, A. Konaka, Shigeki Aoki, S P Mikheyev, A. Cervera, C. Mauger, Kate Scholberg, J. Kameda, C. McGrew, Atsumu Suzuki, A. Okada, Y. Hayato, A. Minamino, H. G. Berns, Shoji Yamamoto, K. Hayashi, J. Mallet, Henry W. Sobel, K. Nitta, Tadayuki Takahashi, John G. Learned, Shaomin Chen, A. Tornero-Lopez, A. Rodriguez, D. Kerr, S. Likhoded, E. Sharkey, Y. Kuno, E. Kearns, C. O. Kim, Katsuhiro Kobayashi, Shigetaka Moriyama, Y. Fukuda, C. Saji, C. Yanagisawa, R. Ashie, K. O. Cho, T. Ishii, R. Nambu, X. Espinal, Y. Moriguchi, R. J. Wilkes, I. T. Lim, Masashi Yokoyama, Tsuyoshi Nakaya, J. Kubota, Masataka Iinuma, J. Yoo, Masato Shiozawa, T. Iwashita, C. K. Jung, D. Kielczewska, I. Kato, Y. Obayashi, S. Mine, M. Fechner, S. Ueda, E. Aliu, Mark R. Vagins, N. Yershov, W. R. Kropp, Yusuke Koshio, S. M. Oser, M. Ishitsuka, David William Casper, C. Mitsuda, J. Hosaka, K. K. Shiraishi, P. F. Loverre, T. Sasaki, L. R. Sulak, V. A. Matveev, Blondel, Alain, Borghi, Silvia, Cervera Villanueva, Anselmo, and Schroeter, Raphaël

Subjects
Particle physics, Meson, Physics::Instrumentation and Detectors, Neutrino-nucleus reactions, FOS: Physical sciences, General Physics and Astronomy, ddc:500.2, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, Experiment-HEP, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Nuclear Experiment, Charged current, Physics, Muon, Tamura, Norio, 010308 nuclear & particles physics, Neutrino oscillations, Física, 田村, 詔生, Production (computer science), High Energy Physics::Experiment, Neutrino, Lepton
Abstract

We report the result from a search for charged-current coherent pion production induced by muon neutrinos with a mean energy of 1.3 GeV. The data are collected with a fully active scintillator detector in the K2K long-baseline neutrino oscillation experiment. No evidence for coherent pion production is observed and an upper limit of $0.60 \times 10^{-2}$ is set on the cross section ratio of coherent pion production to the total charged-current interaction at 90% confidence level. This is the first experimental limit for coherent charged pion production in the energy region of a few GeV., 5 pages, 4 figures

Published
2021

5. Search for B0 decays to invisible final states ( +γ ) at Belle

Author

K. Arinstein, J. Libby, Y. Chao, S. Nishida, A.E. Bondar, Y. Teramoto, C. Ng, K. Senyo, K. Miyabayashi, V. Chekelian, Z. P. Zhang, V. Gaur, M. Shapkin, A.L. Sibidanov, Y. Choi, Z. Doležal, H. O. Kim, S. Uno, Sunmin Ryu, Norihito Muramatsu, E. Nakano, B.A. Shwartz, E. Solovieva, K. T. Kim, H. Miyata, M. Bischofberger, Toru Iijima, T. E. Browder, M. C. Chang, T. Iwashita, G. Varner, Y. Hoshi, R. Gillard, D. M. Asner, G. Tatishvili, Hitoshi Yamamoto, P. Vanhoefer, Peter Kodys, M. Röhrken, K. Chilikin, J. B. Singh, K. Hayasaka, S. E. Vahsen, Jochen Dingfelder, A. Ishikawa, M. Nakao, H. Farhat, C. W. Park, Vladimir Zhulanov, E. Won, H. K. Park, J. Dalseno, Leo Piilonen, M. Iwabuchi, M. E. Sevior, A. Kuzmin, Y. Iwasaki, V. Zhilich, W. S. Hou, O. Schneider, R. Louvot, Frank Simon, H. Park, A. Bozek, Phillip Urquijo, G. B. Mohanty, S. Okuno, Peter Kvasnicka, R. Pestotnik, T. Kawasaki, H. J. Kim, M. Ritter, Y. Usov, T. A. Shibata, V. Vorobyev, J. Li, G. Bonvicini, S. H. Lee, I. Adachi, Z. Drásal, T. Kuhr, S. Esen, B. Bhuyan, Y. S. Sohn, Yasuyuki Horii, C. L. Hsu, M. Uchida, G. Pakhlova, A. M. Bakich, S. Sandilya, D. Liventsev, A. J. Schwartz, Marko Petrič, Hiroaki Aihara, Yang Li, Y. Sakai, T. Julius, Po-Hsun Chen, Yongsun Kim, C. Schwanda, H. J. Hyun, P. Smerkol, H. Sahoo, T. Hara, K. Cho, T. Uglov, J. Haba, R. Itoh, P. Chang, P. Wang, Z. Q. Liu, J. H. Kang, D. Epifanov, Pavel Krokovny, B. G. Cheon, Jung-Hyun Kim, Y. Miyazaki, I. S. Cho, Y. M. Goh, T. Sumiyoshi, James E. Fast, T. K. Pedlar, A. Moll, S. L. Olsen, Samo Korpar, K. M. Williams, T. Sanuki, Semen Eidelman, H. Kichimi, A. Chen, Y. Unno, K. Trabelsi, K. Inami, C. P. Shen, M. Sumihama, B. R. Ko, O. Nitoh, H. Hayashii, Y. B. Hsiung, D. Dutta, M. Watanabe, M. Starič, Y. Watanabe, J. G. Shiu, Tagir Aushev, Y. Yamashita, V.M. Aulchenko, Yueh-Feng Liu, Z. Natkaniec, T. Ohshima, N. Gabyshev, C. Kiesling, M. Bračko, J. B. Kim, Samo Stanič, and Y. J. Kwon

Subjects
Physics, Particle physics, Photon, 010308 nuclear & particles physics, Electron–positron annihilation, Resonance, Photon energy, 01 natural sciences, law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, 010306 general physics, Collider
Abstract

We report searches for B0→invisible and B0→invisible+γ decays, where the energy of the photon is required to be larger than 0.5 GeV. These results are obtained from a 711 fb-1 data sample that contains 772×106BB¯ pairs and was collected near the ϒ(4S) resonance with the Belle detector at the KEKB e+e- collider. We observe no significant signal for either decay and set upper limits on their branching fractions at 90% confidence level of B(B0→invisible)

Published
2020
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6. Heavy ion beam acceleration in the KEK digital accelerator: Induction acceleration from 200keV to a few tens of MeV

Author

Kwee Wah Leo, Tomio Kubo, Yoshihito Okada, Ken Takayama, H. Nakanishi, T. Arai, Takashi Yoshimoto, Toshikazu Adachi, H. Someya, K. Okazaki, E. Kadokura, Shinya Harada, Katsuya Okamura, Xingguang Liu, Dai Arakawa, M. Barata, Hiroyuki Asao, T. Iwashita, T. Kawakubo, and Masayoshi Wake

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Acceleration, Heavy ion beam, Distortion, Physics::Accelerator Physics, KEK digital accelerator, Instrumentation, Closed orbit, Ion
Abstract

The procedure for induction acceleration of a heavy ion beam of A/Q=4 in the KEK digital accelerator is reported. This paper discusses essential issues associated with induction acceleration of ion beams from low energies, including injection error, relatively large closed orbit distortion, and a fully predictive control method for the acceleration.

Published
2014
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7. Measurement of the lepton forward-backward asymmetry inB→Xsℓ+ℓ−decays with a sum of exclusive modes

Author

Z. Q. Liu, R. Gillard, A.E. Bondar, B. G. Cheon, Z. Doležal, X. L. Wang, H. Farhat, H. Sahoo, J. Dalseno, Marko Petrič, H. J. Hyun, M. Z. Wang, K. Kinoshita, U. Tamponi, A. Drutskoy, A. Moll, A. M. Bakich, Y. Iwasaki, E. Ribežl, A. Zupanc, Y. Ushiroda, Z. Natkaniec, T. Iijima, B. Bhuyan, Z. Drásal, Y. J. Kwon, I. Adachi, H. K. Park, G. Bonvicini, R. Seidl, T. E. Browder, E. Kato, Y. Yamashita, Y. S. Sohn, J. Klucar, J. Haba, O. Schneider, S. Korpar, Y. Teramoto, K. Trabelsi, Andrey Sokolov, Kevin Varvell, T. Kuhr, A. Garmash, O. Nitoh, C. P. Shen, P. Krokovny, J. H. Kang, D. Červenkov, D. M. Asner, Y. Sakai, H. Aihara, V. Savinov, V. Bhardwaj, K. Cho, H. Kawai, J. B. Kim, Y. Usov, V.M. Aulchenko, Yueh-Feng Liu, James E. Fast, Yongsun Kim, A. J. Schwartz, B.A. Shwartz, J. Libby, X. H. He, E. Won, S. Uno, Y. Yook, C. Schwanda, T. Kawasaki, I. Jaegle, S. Nishida, J. Yamaoka, Z. P. Zhang, T. Aushev, B. R. Ko, R. Mussa, K. Dutta, K. Adamczyk, G. B. Mohanty, G. Tatishvili, M. J. Kim, H. Hayashii, Y. Watanabe, A. Ishikawa, H. Yamamoto, M. Starič, Vladimir Zhulanov, T. K. Pedlar, Yukinori Sato, J. G. Shiu, Phillip Urquijo, M. Ritter, P. Križan, C. Liu, E. Solovieva, V. Chekelian, M. E. Sevior, T. Saito, T. Peng, T. Ferber, A.L. Sibidanov, T. Kumita, M. Bračko, A. Abdesselam, D. Santel, V. Gaur, T. Iwashita, M. Nakao, V.N. Zhilich, Y. Kato, P. Pakhlov, P. Vanhoefer, D. Semmler, Peter Kodys, H. J. Kim, D. Cinabro, T. Sumiyoshi, M. Uchida, S.E. Vahsen, Sang Hoon Lee, G. Schnell, H. Park, K. Senyo, A. Bozek, A. Chen, Frank Simon, H. Kichimi, T. Sanuki, Samo Stanič, L. E. Piilonen, Mikhail Danilov, M. Shapkin, V. Chobanova, M. Nayak, D. Liventsev, Jung-Hyun Kim, M. Röhrken, E. Nedelkovska, R. Mizuk, W. S. Hou, S. Yashchenko, Yang Li, T. Julius, Y. Choi, R. Pestotnik, V. Vorobyev, C. Van Hulse, N. K. Nisar, T. Hara, L. Santelj, G. S. Varner, B. Golob, R. Itoh, Y. M. Goh, A. Rostomyan, P. Wang, I. S. Cho, C. H. Wang, D. Dutta, Y. Unno, R. Ayad, T. A. Shibata, H. Miyata, Y. Hoshi, S.I. Eidelman, S. Uehara, D. Y. Kim, K. Hayasaka, T. Uglov, A. Kuzmin, S. Ogawa, S. Sandilya, A. Bala, and P.A. Lukin

Subjects
Physics, Particle physics, Muon, 010308 nuclear & particles physics, media_common.quotation_subject, Hadron, Electroweak interaction, 01 natural sciences, Asymmetry, Standard Model, Nuclear physics, KEKB, 0103 physical sciences, High Energy Physics::Experiment, Invariant mass, 010306 general physics, Lepton, media_common
Abstract

We report the first measurement of the lepton forward-backward asymmetry AFB as a function of the squared four-momentum of the dilepton system, q2, for the electroweak penguin process B→Xs+- with a sum of exclusive final states, where is an electron or a muon and Xs is a hadronic recoil system with an s quark. The results are based on a data sample containing 772×106 BB¯ pairs recorded at the (4S) resonance with the Belle detector at the KEKB e+e- collider. AFB for the inclusive B→Xs+- is extrapolated from the sum of 10 exclusive Xs states whose invariant mass is less than 2 GeV/c2. For q2>10.2 GeV2/c2, AFB

Published
2016
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8. Study of B±→K±(KSKπ)0 decay and determination of ηc and ηc(2S) parameters

Author

V.N. Zhilich, Ping Zhou, S. Nishida, Satoshi Tanaka, K. Miyabayashi, A. M. Bakich, Z. Natkaniec, T. Ohshima, Kevin Varvell, A. Matyja, C. Liu, V. Gaur, S. McOnie, A. Ishikawa, H. J. Kim, J. G. Shiu, J. Dalseno, I. Tikhomirov, K. M. Williams, A. Chen, Y. Usov, A. Vossen, M. Uchida, D. Liventsev, Y. J. Kwon, M. C. Chang, O. Seon, Frank Simon, C. W. Park, P. Križan, Z. P. Zhang, H. O. Kim, K. Arinstein, R. Mizuk, G. S. Varner, Marko Petrič, H. J. Hyun, P. Smerkol, R. Itoh, T. E. Browder, J. Li, Y. Chao, Rakesh Kumar, A. Garmash, P. Wang, M. Danilov, O. Schneider, M. Iwabuchi, A.E. Bondar, D. Matvienko, Y. Miyazaki, K. Inami, O. Nitoh, B.A. Shwartz, B. Golob, Y. S. Sohn, P. Pakhlov, H. Nakazawa, E. Nakano, D. Epifanov, B. R. Ko, N. Gabyshev, Y. Watanabe, Anton Poluektov, M. Shapkin, A. Bozek, T. Sumiyoshi, Sang Hoon Lee, B. G. Cheon, Vladimir Zhulanov, Z. Doležal, M. Röhrken, Y. Unno, M. Watanabe, V. Bhardwaj, A. Moll, Vladislav Balagura, C. Z. Yuan, Y. Yamashita, G. Pakhlova, J. Haba, H. Hayashii, K. Senyo, C. L. Lim, Y. Sakai, T. Kawasaki, H. Ha, R. Pestotnik, K. Belous, Jolanta Brodzicka, Andrey Sokolov, P. Kapusta, S. Okuno, Yongsun Kim, T. Julius, Po-Hsun Chen, J. H. Kang, Sunmin Ryu, R. Chistov, K. Kinoshita, H. Sahoo, S. Uno, C. Schwanda, E. Won, S. H. Kyeong, Anze Zupanc, T. Aushev, A. Vinokurova, M. Sumihama, E. Solovieva, S. K. Choi, T. Uglov, I. S. Cho, Y. Teramoto, Bruce Yabsley, R. Louvot, K. Cho, V.E. Shebalin, C. H. Wang, W. S. Hou, Yasuyuki Horii, M. J. Kim, Samo Stanič, V.M. Aulchenko, C. Kiesling, E. L. Barberio, M. J. Lee, O. Zyukova, M. Bračko, M. Starič, T. Kumita, L. E. Piilonen, A. Kuzmin, H. Miyata, Y. Hoshi, S.I. Eidelman, Yang Li, Y. Choi, S. L. Olsen, G. B. Mohanty, T. Iijima, Y. B. Hsiung, T. Iwashita, K. Trabelsi, and C. P. Shen

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, KEKB, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, 010306 general physics, 01 natural sciences, Belle experiment
Abstract

We report the results of a study of B KIrk and /II K tic(2S) decays followed by qc and '/c(2S) decays to (K5K7). The results are obtained from a data sample containing 535 million BB-meson pairs collected by the Belle experiment at the KEKB e+e- collider. We measure the products of the branching fractions B(B > IC7ic)13(71, Ks K 7T) = (26.7 1.4(stat)+N(syst) 4.9(model)) x 10-6 and 8(B -+ K 71c(25))8(rIc(2S) Ksi(7tT) = (3.4+N(stat + model)t(syst)) x 10-6. Interference with the non-resonant component leads to significant model uncertainty in the measurement of these product branching fractions. Our analysis accounts for this interference and allows the model uncertainty to be reduced. We also obtain the following charmonia masses and widths: MO/c) = (2985.4 1.5(stat)1:8(syst)) MeV /c2, r(t1c)= (35.1 3.1(sta0+1:2(syst)) MeV/c2, M(ric (2S)) = (3636.111(stat + model)+3:70 (syst)) MeV/c2, r (17c (2S)) = (6.61:1(stat + model)11(syst)) MeV/c2. C) 2011 Elsevier B.V. All rights reserved.

Published
2011
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9. Search forB+→e+νeandB+→μ+νμdecays using hadronic tagging

Author

M. Nayak, B. Bhuyan, S. Nishida, Yukinori Sato, T. E. Browder, Vikas Bansal, T. A. Shibata, B.A. Shwartz, M. E. Sevior, Sunmin Ryu, H. Miyata, H. Farhat, V. Chobanova, M. Bračko, K. T. Kim, D. Liventsev, R. Glattauer, M. Z. Wang, K. Kinoshita, Phillip Urquijo, S. Al Said, M. Ritter, A. Drutskoy, D. Dutta, I. Adachi, K. Dutta, V.M. Aulchenko, Yueh-Feng Liu, X. H. He, A. Bala, C. Van Hulse, Yang Li, A. Rostomyan, K. Trabelsi, C. P. Shen, Y. J. Kwon, K. Arinstein, N. K. Nisar, L. Santelj, R. Itoh, P. Wang, T. Sumiyoshi, A.S. Kuzmin, V. Chekelian, T. Kuhr, D. Y. Kim, Y. Choi, G. Bonvicini, Y. M. Goh, R. Gillard, M. N. Wagner, G. B. Mohanty, T. Ferber, J. B. Kim, Y. Hoshi, Yongsun Kim, A. Moll, S. Wehle, J. Haba, T. Aushev, Y. Yusa, A. Ishikawa, A. Vinokurova, C. Schwanda, Kyung-Suk Cho, S. Korpar, Y. Teramoto, K. Hayasaka, Byung Gu Cheon, I. Jaegle, O. Schneider, K. M. Williams, Y. Watanabe, Yasuyuki Horii, A. Garmash, J. Klucar, O. Frost, M. Starič, J. E. Fast, S. Yashchenko, A. Chen, E. Kato, A. M. Bakich, T. Julius, Z. DoleŽal, V. Bhardwaj, M. Sumihama, V. Savinov, S. Bahinipati, S. Ogawa, S. Sandilya, O. Nitoh, Z. Natkaniec, K. Hara, I. Nakamura, P. Pakhlov, Z. Drásal, Chang Liu, P. Krokovny, L. Li Gioi, M. Heck, T. Kawasaki, R. Chistov, Jung-Hyun Kim, V.E. Shebalin, M. J. Kim, D. Červenkov, V.N. Zhilich, H. Park, A. Bozek, E. Nakano, D. M. Asner, S. Okuno, K. Miyabayashi, P. Lukin, B. R. Ko, N. Gabyshev, E. Nedelkovska, H. Hayashii, A.L. Sibidanov, Takuya Higuchi, R. Ayad, T. K. Pedlar, L. E. Piilonen, J. G. Shiu, G. Schnell, Toru Iijima, Y. Sakai, G. Varner, C. Kiesling, A.E. Bondar, C. S. Park, T. Saito, M. Uchida, M. Steder, M. Röhrken, K. Chilikin, Yasushi Nagasaka, Peter Kodys, K. Senyo, P. Katrenko, X. L. Wang, T. Uglov, O. Seon, R. Pestotnik, T. Sanuki, T. Iwashita, E. Won, P. Vanhoefer, W. S. Hou, Andrey Sokolov, V. Vorobyev, E. Solovieva, V. Gaur, B. Golob, J. S. Lange, S. Ganguly, Y. Yook, Semen Eidelman, G. Tatishvili, M. Petrič, R. Mussa, P. Križan, A. Zupanc, Z. P. Zhang, Y. S. Sohn, A. Abdesselam, Kevin Varvell, Y. Usov, O. Grzymkowska, C. H. Wang, M. Watanabe, H. K. Park, F. Simon, Y. Yamashita, Y. Iwasaki, and M. Nakao

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Hadron, 01 natural sciences, Nuclear physics, KEKB, 0103 physical sciences, High Energy Physics::Experiment, B meson, 010306 general physics
Abstract

We present a search for the rare leptonic decays B+ -> e(+)nu(e) and B+ -> mu(+) nu(mu) using the full Upsilon(4S) data sample of 772 x 10(6) B (B) over bar pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. One of the B mesons from the Upsilon(4S) -> B (B) over bar decay is fully reconstructed in a hadronic mode, while the recoiling side is analyzed for the signal decay. We find no evidence of a signal in any of the decay modes. Upper limits of the corresponding branching fractions are determined as beta(B+ -> e(+)nu(e)) mu(+)nu(mu)) < 2.7 x 10(-6) at 90% confidence level.

Published
2015
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10. Measurement of neutrino oscillation by the K2K experiment

Author

S. Andringa, T. Nakadaira, R. Gran, Tadayuki Takahashi, Yoshitaka Itow, Makoto Sakuda, F. Nakata, K. Fujii, A. Rodriguez, D. Kerr, M. H. Ahn, U. Dore, S. Likhoded, S P Mikheyev, K. Martens, Y. Totsuka, Y. Takubo, Kate Scholberg, Y. Takeuchi, Yu. Kudenko, Shinya Yamada, H. I. Jang, S. C. Boyd, M. Okumura, A. Blondel, A. Ikeda, K. Tashiro, Itsuo Nakano, C. K. Jung, M. Sekiguchi, H. Yokoyama, F. Pierre, Minoru Yoshida, M. Kitamura, L. Whitehead, K. Taki, S. Nawang, N. Yershov, Shogo Nishiyama, O. V. Mineev, E. Sharkey, K. Kaneyuki, Hirokazu Ishino, D. Kielczewska, Shoei Nakayama, Taichi Morita, Y. Kurimoto, Hiroyuki Noumi, T. Otaki, R. Schroeter, L. Ludovici, E. J. Jeon, Takashi Kobayashi, J. Kameda, M. Onchi, Y. Yamanoi, C. Cavata, M. Sorel, Katsuki Hiraide, H. C. Bhang, P. F. Loverre, J. Bouchez, M. Y. Pac, G. Sitjes, S. Mine, C. O. Kim, I. Kato, E. Seo, A. Shima, T. Kutter, K. Hayashi, H. So, S. M. Oser, T. Ishida, J. Hill, J. Catala, A. K. Ichikawa, Tomoyuki Maruyama, T. Hara, K. K. Joo, Lawrence Sulak, P. Novella, Susumu Noda, S. Fukuda, K. Takenaka, Yoshitaka Kuno, T. Ishii, Masaaki Tanaka, F. Nova, John G. Learned, Y. Yamada, B. H. Kang, Y. Obayashi, M. Takasaki, A. Minamino, A. Tornero-Lopez, J.J. Gómez-Cadenas, Takanori Sasaki, M. Fechner, S. Echigo, C. Yanagisawa, J. Zalipska, C. McGrew, G. Jover, J.H. Kim, K. Nakamura, K. B. McConnel Mahn, S. B. Kim, V. A. Matveev, M. Minakawa, A. Cervera, C. W. Walter, Y. Takenaga, Y. Hayato, Yuichi Oyama, Masaya Hasegawa, M. Miura, G. Kume, M. Tada, David William Casper, Takehisa Hasegawa, C. Mitsuda, K. Sato, J. Hosaka, A. Suzuki, R. L. Helmer, Hyosun Kim, Katsuhiro Kobayashi, A. Sakai, Nobuyuki Sakurai, Yusuke Koshio, S. Ueda, Shoji Yamamoto, J. Mallet, S. Matsuno, H. Takeuchi, T. Ooyabu, Masayuki Nakahata, Y. Aoyama, R. Terri, R. Ashie, H. Ishii, Y. Suga, Masashi Yokoyama, J. S. Jang, G. Mitsuka, E. Aliu, H. Tanaka, A. Sarrat, Mark R. Vagins, K. K. Shiraishi, Takaaki Kajita, Masaki Ishitsuka, Kenichi Tanaka, Yoshihiro Suzuki, H. Park, Masaharu Ieiri, X. Espinal, Y. Moriguchi, Beom Jun Kim, Michael B. Smy, Y. Fukuda, T. Iwashita, R. J. Wilkes, I. Higuchi, I. T. Lim, Y. Kato, W. R. Kropp, Federico Sanchez, Toshio Namba, C. Mariani, H. Maesaka, Ko Okumura, E. Kearns, Shigeki Aoki, T. Toshito, Hiroshi Sato, K. Asakura, P. Kitching, C. Mauger, J. Argyriades, H. Nishino, S. H. Lim, A. Okada, M. Kohama, M. Takatsuki, F. Berghaus, Tsuyoshi Nakaya, C. Saji, J. Kubota, Jordi Burguet-Castell, H. G. Berns, W. Wang, Masataka Iinuma, E. Hirose, J. Yoo, K. Nishikawa, J. Y. Kim, Henry W. Sobel, K. Nitta, Y. Tanaka, Masato Shiozawa, Shaomin Chen, A. Konaka, Shigetaka Moriyama, K. O. Cho, R. Nambu, N. Tamura, Silvia Borghi, J. L. Stone, T. Inagaki, A. N. Khotjantsev, Y. Fujii, J. H. Choi, M. M. Khabibullin, Stephane T'Jampens, E. Fernandez, I. S. Jeong, and K. Ishihara

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Tamura, Norio, 010308 nuclear & particles physics, Oscillation, T2K experiment, FOS: Physical sciences, Física, Elementary particle, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Massless particle, High Energy Physics - Experiment (hep-ex), K2K experiment, 0103 physical sciences, 田村, 詔生, Neutrino, 010306 general physics, Neutrino oscillation, Lepton
Abstract

We present measurements of nu_mu disappearance in K2K, the KEK to Kamioka long-baseline neutrino oscillation experiment. One hundred and twelve beam-originated neutrino events are observed in the fiducial volume of Super-Kamiokande with an expectation of 158.1^{+9.2}_{-8.6} events without oscillation. A distortion of the energy spectrum is also seen in 58 single-ring muon-like events with reconstructed energies. The probability that the observations are explained by the expectation for no neutrino oscillation is 0.0015% (4.3sigma). In a two flavor oscillation scenario, the allowed Delta m^2 region at sin^2(2theta) is between 1.9 and 3.5 x 10^{-3} eV^2 at the 90% C.L. with a best-fit value of 2.8 x 10^{-3} eV^2., Comment: 40 pages, 48 figures

Published
2006

11. Indications of Neutrino Oscillation in a 250 km Long-Baseline Experiment

Author

David William Casper, C. W. Walter, Makoto Sakuda, C. Yanagisawa, Toshio Namba, M. H. Ahn, K. Martens, W. R. Kropp, Nobuyuki Sakurai, H. W. Sobel, S. Fukuda, Atsumu Suzuki, H. Maesaka, Takehisa Hasegawa, T. Iwashita, Minoru Yoshida, Y. Fukuda, S. H. Lim, S. B. Boyd, K. Nishikawa, S. Mine, J. L. Stone, Y. Takeuchi, K. Kaneyuki, Yuichi Oyama, E. Kearns, T. Inagaki, Shinya Yamada, Y. Totsuka, E. J. Jeon, M. Kohama, Shoei Nakayama, Koji Nakamura, S. Matsuno, H. I. Jang, Kazumasa Miyano, J. Hill, C. K. Jung, Masaya Hasegawa, M. Miura, S. B. Kim, Tomoyuki Maruyama, J. H. Choi, D. Kielczewska, Hwangseo Park, I. Kato, John G. Learned, Itsuo Nakano, L. R. Sulak, T. Ishida, A. Obayashi, E. Sharkey, Susumu Noda, H. C. Bhang, T. Ishii, N. Tamura, M. Y. Pac, Yasunari Suzuki, C. O. Kim, N. Sasao, J. S. Jang, H. Yokoyama, W. Gajewski, Kate Scholberg, Ken-ichiro Kobayashi, A. K. Ichikawa, T. Toshito, R. J. Wilkes, Shigetaka Moriyama, A. Kibayashi, J. Y. Kim, I. T. Lim, T. Hara, Shogo Nishiyama, J. Kameda, C. McGrew, M. Ishitsuka, H. So, Shigeki Aoki, J. Yoo, J. Zalipska, Takashi Kobayashi, A. Ikeda, Y. Hayato, A. L. Stachyra, Mark R. Vagins, Masato Shiozawa, Shoji Yamamoto, Tsuyoshi Nakaya, Y. Suga, F. Nakata, Beom Jun Kim, Yoshitaka Itow, Yusuke Koshio, T. Ooyabu, Masayuki Nakahata, Takaaki Kajita, C. Mauger, and A. Okada

Subjects
Physics, Tamura, Norio, Physics::Instrumentation and Detectors, Oscillation, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, High Energy Physics::Phenomenology, FOS: Physical sciences, General Physics and Astronomy, Solar neutrino problem, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), K2K experiment, Measurements of neutrino speed, High Energy Physics::Experiment, 田村, 詔生, Neutrino, Neutrino oscillation, Charged current
Abstract

The K2K experiment observes indications of neutrino oscillation: a reduction of $\nu_\mu$ flux together with a distortion of the energy spectrum. Fifty-six beam neutrino events are observed in Super-Kamiokande (SK), 250 km from the neutrino production point, with an expectation of $80.1^{+6.2}_{-5.4}$. Twenty-nine one ring $\mu$-like events are used to reconstruct the neutrino energy spectrum, which is better matched to the expected spectrum with neutrino oscillation than without. The probability that the observed flux at SK is explained by statistical fluctuation without neutrino oscillation is less than 1%., Comment: 5 pages, 3 figures embedded, LaTeX with RevTeX style, accepted for publication in PRL on December 13, 2002

Published
2003

12. Determination of solar neutrino oscillation parameters using 1496 days of Super-Kamiokande-I data

Author

Masatoshi Koshiba, Takashi Kobayashi, M. Ishitsuka, Shoichi Yamada, Takaaki Kajita, A. Kibayashi, L. R. Sulak, Shantanu Desai, Y. Ichikawa, K. Kobayashi, M. D. Messier, Y. Totsuka, T. Shibata, K. Kaneyuki, M. Takita, J. Shirai, S. Tasaka, W. E. Keig, Atsumu Suzuki, M. Earl, D. W. Liu, John G. Learned, M. Etoh, R. Nishimura, Makoto Sakuda, G. W. Sullivan, A. L. Stachyra, K. Miyano, C. W. Walter, Y. Nagashima, S. Matsuno, E. Sharkey, S. Dazeley, Hyosun Kim, D. Takemori, R. Svoboda, G. Guillian, R. W. Ellsworth, C. McGrew, A. M. Gago, K. Martens, S. Moriyama, C. Saji, J. Kameda, J. L. Stone, David William Casper, S. Nakayama, Yoshihiro Suzuki, T. Ishii, Kunio Inoue, Yoshitaka Itow, M. L. Chen, D. Turč, Y. Obayashi, J. A. Goodman, C. Mitsuda, K. S. Ganezer, T. Inagaki, Y. Kajiyama, S. Hatakeyama, R. J. Wilkes, M. Goldhaber, Y. Gando, M. Koike, Toshio Namba, Henry W. Sobel, K. Nitta, M. Ackermann, Y. Fukuda, E. Kearns, B. Viren, Koji Nakamura, S. Mine, Kyoshi Nishijima, Masayuki Nakahata, K. Nishikawa, M. Miura, Y. Takeuchi, Todd Haines, M. B. Smy, S. C. Boyd, T. Ishizuka, S. Fukuda, A. K. Ichikawa, Minoru Yoshida, C. Yanagisawa, H. Okazawa, K. Ishihara, A. Suzuki, M. Kohama, T. Iwashita, J. Hill, A. Okada, N. Sakurai, H. G. Berns, Alec Habig, Y. Watanabe, Mikio Morii, E. Blaufuss, Tsuyoshi Nakaya, C. K. Jung, C. Mauger, T. Toshito, J. Yoo, D. Kielczewska, Magdalena Malek, T. Maruyama, Masato Shiozawa, I. Kato, T. Barszczak, H. Takeuchi, Y. Hatakeyama, S. B. Kim, W. R. Kropp, Y. Oyama, Y. Hayato, Yusuke Koshio, Takehisa Hasegawa, Hirokazu Ishino, M. R. Vagins, W. Gajewski, and Kate Scholberg

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Standard solar model, Solar neutrino, High Energy Physics::Phenomenology, Solar neutrino problem, High Energy Physics - Experiment, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Neutrino, GALLEX, Super-Kamiokande, Neutrino oscillation
Abstract

A number of different fits to solar neutrino mixing and mass square difference were performed using 1496 days of Super-Kamiokande-I's solar neutrino data. These data select two allowed areas at large neutrino mixing when combined with either the solar $^8$B flux prediction of the standard solar model or the SNO interaction rate measurements. A global fit combining SK data with the solar neutrino interaction rates measured by Homestake, SNO, Gallex/GNO and SAGE prefers a single allowed area, the Large Mixing Angle solution, at the 98.9% confidence level. The mass square difference $\Delta m^2$ between the two mass eigenstates ranges from about 3 to $19\times10^{-5}$eV$^2$, while the mixing angle $\theta$ is in the range of $\tan^2\theta\approx$0.25--0.65., Comment: 10 Pages, 4 figures, submitted to Physics Letters B

Published
2002
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13. Measurement of the Branching FractionB(Λc+→pK−π+)

Author

A. Garmash, M. Steder, V.N. Zhilich, G. Schnell, M. J. Kim, T. Iijima, M. Starič, I. Jaegle, K. Miyabayashi, L. E. Piilonen, T. Kumita, T. Kuhr, S. Nishida, H. K. Park, Y. Yamashita, E. Nedelkovska, A. M. Bakich, Z. Natkaniec, G. Pakhlova, I. Adachi, H. Nakazawa, D. Cinabro, A. Rostomyan, B. Golob, S. Yashchenko, J. B. Kim, T. Julius, V. Chekelian, H. J. Kim, N. Gabyshev, D. Červenkov, R. Chistov, S. Ganguly, Chang Liu, Y. Iwasaki, Y. J. Kwon, Jung-Hyun Kim, O. Schneider, D. A. Epifanov, B. Bhuyan, Sunmin Ryu, E. Won, T. Sumiyoshi, M. Niiyama, T. E. Browder, A. Zupanc, Sang Hoon Lee, H. Farhat, M. Feindt, A.S. Kuzmin, Yang Li, J. Klucar, T. Sanuki, Yongsun Kim, S. L. Olsen, S. Uno, C. Schwanda, T. Iwashita, Hitoshi Yamamoto, P. Vanhoefer, Y. Choi, O. Nitoh, R. Gillard, N. K. Nisar, K. Trabelsi, V. Savinov, H. Hayashii, K. Dutta, L. Santelj, V. Gaur, I. S. Cho, C. P. Shen, M. C. Chang, S. Ogawa, A.L. Sibidanov, M. Nakao, W. S. Hou, Y. S. Sohn, Z. Drásal, J. G. Shiu, J. Dalseno, T. Aushev, X. H. He, Y. M. Goh, Hiroaki Aihara, T. Ferber, V. Vorobyev, J. MacNaughton, Y. Kato, C. H. Wang, Phillip Urquijo, D. Dutta, R. Mussa, P. Pakhlov, Y. Teramoto, S. Uehara, J. Li, A. Ishikawa, M. Ritter, M. Bračko, J. Haba, E. Kato, D. Y. Kim, H. Sahoo, Mikhail Danilov, M. Shapkin, M. Röhrken, K. Chilikin, Z. P. Zhang, C. W. Park, P. Križan, T. A. Shibata, H. Miyata, M. Watanabe, G. Bonvicini, Y. Hoshi, S.I. Eidelman, K. Kinoshita, U. Tamponi, H. Park, A. Bozek, J. Libby, R. Pestotnik, K. Hayasaka, C. Bartel, B. G. Cheon, R. Glattauer, A. Vinokurova, G. B. Mohanty, Andrey Sokolov, V.M. Aulchenko, Yueh-Feng Liu, H. Kichimi, R. Mizuk, K. M. Williams, K. Belous, Kevin Varvell, P. Krokovny, J. H. Kang, M. Nayak, S. Korpar, Y. Watanabe, B.A. Shwartz, K. Cho, Y. Usov, Vladimir Zhulanov, E. Nakano, M. E. Sevior, B. Kronenbitter, W. Ostrowicz, James E. Fast, B. R. Ko, Samo Stanič, C. Van Hulse, Yoshinobu Unno, Y. Yook, T. K. Pedlar, A. Moll, D. Semmler, T. Saito, Peter Kodys, K. Senyo, M. Uchida, V. Chobanova, G. Tatishvili, D. Liventsev, G. S. Varner, R. Itoh, P. Wang, M. N. Wagner, Marko Petrič, H. J. Hyun, D. M. Asner, T. Kawasaki, S. K. Choi, S. Sandilya, A.E. Bondar, Kiyoshi Tanida, A. Bala, Z. Doležal, X. L. Wang, O. Seon, Frank Simon, Y. Sakai, M. Huschle, E. Solovieva, and Z. Q. Liu

Subjects
Physics, Branching fraction, Electron–positron annihilation, Analytical chemistry, General Physics and Astronomy, Atomic physics, Absolute branching fractions, Asymmetric energy, Belle detectors, Branching fractions, Data sample, Lambda, Nuclear physics, Baryon, Charmed baryons, KEKB, Pi, High Energy Physics::Experiment, Bar (unit)
Abstract

We present the first model-independent measurement of the absolute branching fraction of the Lambda(+)(c) -> pK(-)pi(+)decay using a data sample of 978 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The number of Lambda(+)(c) baryons is determined by reconstructing the recoiling D(*)(-)(p) over bar pi(+)system in events of the type e(+)e(-) -> D(*)(-)(p) over bar pi(+)Lambda(+)(c). The branching fraction is measured to be B(Lambda(+)(c) -> pK(-)pi(+)) = (6.84 +/- 0.24(-0.27)(+0.21))%, where the first and second uncertainties are statistical and systematic, respectively.

Published
2014
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14. Observation ofD0−D¯0Mixing ine+e−Collisions

Author

A. J. Schwartz, Peter Kodys, Chang Liu, A.E. Bondar, J. G. Shiu, G. Schnell, T. Iijima, T. Kuhr, Mikhail Danilov, M. Shapkin, J. Dalseno, Y. Sakai, S. Ogawa, Z. P. Zhang, A. Rostomyan, Phillip Urquijo, M. Röhrken, K. Chilikin, G. Tatishvili, P. Lukin, B. R. Ko, H. Hayashii, E. Nakano, M. Ritter, L. E. Piilonen, S. E. Vahsen, V.N. Zhilich, A. Garmash, I. Adachi, R. Mussa, T. Aushev, K. Arinstein, G. Pakhlova, C. C. Zhang, H. Sahoo, C. Van Hulse, I. Jaegle, K. Miyabayashi, A. Ishikawa, T. Uglov, J. B. Kim, Z. Doležal, G. B. Mohanty, E. Nedelkovska, Anze Zupanc, C. W. Park, Z. Drásal, S. Okuno, T. K. Pedlar, Jasvinder A. Singh, T. Kawasaki, M. Uchida, P. Križan, T. Ferber, I. S. Cho, A. Moll, H. Farhat, M. Steder, Marko Petrič, S. Yashchenko, Yasushi Nagasaka, B. Golob, V. Chobanova, J. Li, Yoshinobu Unno, G. S. Varner, O. Nitoh, Y. Iwasaki, Y. S. Sohn, C. H. Wang, H. J. Hyun, Y. J. Kwon, R. Itoh, Takuya Higuchi, D. Dutta, H. K. Park, T. Julius, R. Chistov, P. Wang, Y. Yamashita, M. N. Wagner, D. Matvienko, Yongsun Kim, X. H. He, M. Z. Wang, Andrey Sokolov, Z. Q. Liu, Hiroaki Aihara, Y. Usov, A. Bozek, J. Haba, U. Tamponi, O. Schneider, R. Seidl, D. M. Asner, S. Uno, C. Schwanda, Y. Teramoto, A. Vinokurova, K. Dutta, Samo Stanič, James E. Fast, Byung Gu Cheon, P. Krokovny, T. A. Shibata, H. Miyata, Y. Hoshi, K. Cho, A.S. Kuzmin, B. Bhuyan, A. Chen, Y. Yook, Semen Eidelman, S. Korpar, B.A. Shwartz, T. E. Browder, S. Uehara, D. Cinabro, J. Klucar, Z. Natkaniec, A. Bobrov, R. Gillard, D. Y. Kim, S. K. Choi, V. Savinov, T. Sumiyoshi, V. Gaur, V. Bhardwaj, M. J. Kim, Sang Hoon Lee, T. Sanuki, D. Červenkov, M. Starič, K. Trabelsi, A. Bala, Yang Li, Y. Choi, T. Kumita, N. K. Nisar, T. Hara, L. Santelj, M. E. Sevior, M. Nakao, C. P. Shen, Y. M. Goh, Jung-Hyun Kim, C. Kiesling, A.L. Sibidanov, D. A. Epifanov, T. Peng, M. Bračko, J. S. Lange, S. Ganguly, J. Libby, R. Glattauer, M. Nayak, Sunmin Ryu, E. Won, T. Iwashita, Hitoshi Yamamoto, P. Vanhoefer, W. S. Hou, V. Vorobyev, V.M. Aulchenko, Y. Watanabe, O. Seon, and Frank Simon

Subjects
Nuclear physics, Physics, KEKB, law, Electron–positron annihilation, General Physics and Astronomy, Collider, Measure (mathematics), Mixing (physics), Standard deviation, Bar (unit), Luminosity, law.invention
Abstract

We observe D-0-(D) over bar (0) mixing in the decay D-0 -> K+ pi(-) using a data sample of integrated luminosity 976 fb(-1) collected with the Belle detector at the KEKB e(+) e(-) asymmetric-energy collider. We measure the mixing parameters x'(2) = (0.09 +/- 0.22) x 10(-3) and y' = (4.6 +/- 3.4) x 10(-3) and the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates R-D = (3.53 +/- 0.13) x 10(-3) where the uncertainties are statistical and systematic combined. Our measurement excludes the no-mixing hypothesis at the 5.1 standard deviation level.

Published
2014
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15. Induction acceleration of heavy ions in the KEK digital accelerator: Demonstration of a fast-cycling induction synchrotron

Author

T. Arai, Katsuya Okamura, E. Kadokura, Akira Takagi, Shinya Harada, H. Nakanishi, Toshikazu Adachi, Hiroyuki Asao, Yoshihito Okada, S. Takano, T. Iwashita, Ken Takayama, K. Okazaki, Liu Xingguang, Tadamichi Kawakubo, Takashi Yoshimoto, Masayoshi Wake, Leo Kwee Wah, M. Barata, and Dai Arakawa

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Physics and Astronomy (miscellaneous), business.industry, Surfaces and Interfaces, Synchrotron, law.invention, Pulse (physics), Ion, Nuclear physics, Acceleration, law, Optoelectronics, Physics::Accelerator Physics, lcsh:QC770-798, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, KEK digital accelerator, Transformer, business, Voltage
Abstract

A fast-cycling induction synchrotron was demonstrated. Ions with extremely low energies and mass-to-charge ratios ($A/Q$) in the range from 2 to 10 were injected, captured by barrier voltages, and accelerated to the end of the acceleration cycle of 50 ms by flat pulse voltages generated by pulse transformers referred to as induction cells. Induction acceleration in a wide dynamic frequency range of 56 kHz to 1 MHz was also demonstrated. This accelerator is expected as the next generation of a heavy ion driver for cancer therapy, where a large scale injector is not required. A wide variety of ions for ion energy implantation experiments needing novel materials will be delivered from this compact circular accelerator.

Published
2014

16. Measurement of the $\tau$-lepton lifetime at Belle

Author

James E. Fast, M. J. Kim, Y. Yook, Semen Eidelman, W. S. Hou, V. Gaur, H. K. Park, H. Hayashii, T. E. Browder, Marko Petrič, J. G. Shiu, S. E. Vahsen, K. M. Williams, A. Chen, E. Kato, B. G. Cheon, D. Matvienko, J. Dalseno, D. M. Asner, H. Sahoo, A. Bozek, G. Tatishvili, M. Ritter, S. Okuno, K. Inami, H. Farhat, O. Schneider, G. Schnell, Y. Teramoto, A. Zupanc, Kevin Varvell, T. Iwashita, V. Zhilich, M. Röhrken, K. Chilikin, B. Golob, B.A. Shwartz, T. Uglov, A.S. Kuzmin, R. Pestotnik, R. Mussa, N. K. Nisar, T. Hara, M. Bračko, S. Nishida, L. Santelj, Y. Watanabe, A.L. Sibidanov, T. Mori, Y. Usov, K. Kinoshita, U. Tamponi, A. Ishikawa, M. Nakao, O. Nitoh, T. Ferber, C. W. Park, P. Križan, A.E. Bondar, T. Kuhr, M. Starič, Y. M. Goh, Y. S. Sohn, S. Uehara, G. Varner, A. Rostomyan, A. Bala, Z. P. Zhang, Y. Hoshi, G. B. Mohanty, C. Kiesling, R. Mizuk, J. Yamaoka, V. Chekelian, Hiroaki Aihara, D. Y. Kim, M. Watanabe, I. Jaegle, Y. Choi, Z. Doležal, G. Bonvicini, J. S. Lange, S. Ganguly, A. Vinokurova, Yoshinobu Unno, E. Nedelkovska, S. Ogawa, C. Z. Yuan, M. Uchida, T. Sumiyoshi, K. Belous, S. Korpar, T. Saito, V. Chobanova, V.E. Shebalin, P. Krokovny, D. Liventsev, B. Bhuyan, W. Ostrowicz, Peter Kodys, K. Cho, D. Cinabro, Leo Piilonen, A. Bobrov, P. Lukin, B. R. Ko, H. J. Kim, D. Dutta, V. Savinov, E. Won, O. Seon, Frank Simon, R. Itoh, Toru Iijima, Yongsun Kim, D. Červenkov, V. Vorobyev, T. Sanuki, A. Garmash, T. K. Pedlar, C. H. Wang, S. Uno, K. Trabelsi, P. Wang, C. Schwanda, S. H. Lee, M. N. Wagner, C. P. Shen, I. Adachi, D. Santel, G. Pakhlova, D. Semmler, R. Gillard, C. Ng, K. Senyo, H. Park, J. Haba, Sunmin Ryu, M. Steder, J. B. Kim, A. M. Bakich, Y. Yamashita, Y. Sakai, Yasushi Nagasaka, V.M. Aulchenko, Samo Stanič, Y. J. Kwon, P. Vanhoefer, D. A. Epifanov, S. Sandilya, H. Kichimi, T. Tsuboyama, M. Nayak, S. Yashchenko, J. Libby, E. Nakano, T. Julius, R. Chistov, C. Van Hulse, M. Shapkin, S. L. Olsen, T. A. Shibata, H. Miyata, K. Hayasaka, and Andrey Sokolov

Subjects
Particle physics, +3pi+neutrino%2Ftau%22">tau --> 3pi neutrino/tau, Electron–positron annihilation, article, elementary particle, methodology, nuclear physics, quantum theory, theoretical model, Elementary Particles, Models, Theoretical, Nuclear Physics, Quantum Theory, General Physics and Astronomy, Elementary particle, BELLE, annihilation [electron positron], Resonance (particle physics), High Energy Physics - Experiment, Nuclear physics, KEK-B, +tau%2B+tau%22">electron positron --> tau+ tau, ddc:550, Physics, lifetime, difference [lifetime], High Energy Physics::Phenomenology, semileptonic decay [tau], pair production [tau], High Energy Physics::Experiment, approx. 10.58 GeV-cms, Lepton, experimental results
Abstract

The lifetime of the $\tau$-lepton is measured using the process $e^+e^-\rightarrow\tau^+\tau^-$, where both $\tau$-leptons decay to $3\pi\nu_\tau$. The result for the mean lifetime, based on $711\,\mathrm{fb}^{-1}$ of data collected with the Belle detector at the $\Upsilon(4S)$ resonance and $60\,\mathrm{MeV}$ below, is $\tau = (290.17 \pm 0.53(\mathrm{stat.}) \pm 0.33(\mathrm{syst.}))\cdot10^{-15}\,\mathrm{s}$. The first measurement of the lifetime difference between $\tau^+$ and $\tau^-$ is performed. The upper limit on the relative lifetime difference between positive and negative $\tau$-leptons is $|\Delta\tau| / \tau < 7.0 \times 10^{-3}$ at 90% CL., Comment: 17 pages, 4 figures. Submitted to Phys. Rev. Lett

Published
2014
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17. Evidence forB−→τ−ν¯τwith a Hadronic Tagging Method Using the Full Data Sample of Belle

Author

D. M. Asner, Yukinori Sato, G. Tatishvili, B. R. Ko, Y. Iwasaki, J. Dalseno, S. Nishida, S. H. Lee, Phillip Urquijo, T. A. Shibata, S. Uno, Sunmin Ryu, O. Schneider, H. Hayashii, S. Esen, A.S. Kuzmin, Y. Sakai, D. Cinabro, Anze Zupanc, Hitoshi Yamamoto, P. Vanhoefer, Pavel Krokovny, Y. Teramoto, D. Liventsev, Marko Petrič, Jung-Hyun Kim, P. Smerkol, A. Drutskoy, G. Schnell, E. Solovieva, Leo Piilonen, O. Seon, Frank Simon, K. Miyabayashi, M. Barrett, B. Bhuyan, R. Itoh, K. Trabelsi, B. G. Cheon, D. Matvienko, V. Vorobyev, M. J. Kim, S. Uehara, T. Iwashita, P. Wang, T. Kuhr, J. Klucar, I. S. Cho, E. Nakano, Y. S. Sohn, Takuya Higuchi, C. Van Hulse, B. Golob, A. Ishikawa, A.L. Sibidanov, V. Gaur, M. Shapkin, M. N. Wagner, B. Shwartz, S. Okuno, Samo Korpar, C. P. Shen, K. Hara, H. Farhat, P. Pakhlov, Bruce Yabsley, T. Kumita, T. E. Browder, O. Nitoh, K. Inami, T. Nozaki, M. Nakao, J. S. Lange, S. Ganguly, V. Zhilich, C. W. Park, P. Križan, J. Libby, I. Adachi, Jochen Dingfelder, A. Bozek, C. H. Wang, Kevin Varvell, J. Li, D. Dutta, H. K. Park, D. Santel, G. Varner, Y. Hoshi, A. M. Bakich, C. Oswald, T. Kawasaki, M. T. Prim, Hiroaki Aihara, T. Mori, Y. Usov, K. M. Williams, T. Julius, Po-Hsun Chen, A. Chen, Y. Unno, S. Sandilya, Norihito Muramatsu, M. Z. Wang, K. Kinoshita, J. Haba, Toru Iijima, T. Sumiyoshi, Z. P. Zhang, M. Röhrken, K. Chilikin, H. O. Kim, H. Nakazawa, V. Bhardwaj, H. Ozaki, T. Sanuki, Yongsun Kim, A. J. Schwartz, V. Chekelian, Peter Kodys, Richard T. Kouzes, Tariq Aziz, C. Schwanda, Yang Li, R. Pestotnik, Chang Liu, E. Won, N. K. Nisar, Z. Drásal, T. Hara, A. Frey, K. Sakai, M. Uchida, H. Sahoo, G. Pakhlova, Y. M. Goh, T. Tsuboyama, M. Nayak, G. B. Mohanty, M. Watanabe, R. Mizuk, Y. Yusa, Vladimir Zhulanov, M. E. Sevior, Andrey Sokolov, B. Kronenbitter, J. H. Kang, K. Nishimura, D. Epifanov, T. K. Pedlar, A. Moll, Semen Eidelman, G. Bonvicini, K. Cho, K. T. Kim, R. Gillard, C. Ng, K. Senyo, Yasuyuki Horii, A.E. Bondar, Y. Choi, Z. Doležal, Z. Q. Liu, M. Starič, Y. Watanabe, H. Miyata, J. G. Shiu, K. Hayasaka, S. L. Olsen, M. Sumihama, Y. Ushiroda, Tagir Aushev, Y. Yamashita, Yueh-Feng Liu, Z. Natkaniec, T. Ohshima, N. Gabyshev, C. Kiesling, M. Bračko, J. B. Kim, and Y. J. Kwon

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, 01 natural sciences, Measure (mathematics), law.invention, Nuclear physics, KEKB, Recoil, law, 0103 physical sciences, B meson, 010306 general physics, Collider
Abstract

We measure the branching fraction of B- → τ- ν(τ) using the full Υ(4S) data sample containing 772×10(6) BB pairs collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. Events with BB pairs are tagged by reconstructing one of the B mesons decaying into hadronic final states, and B- → τ- ν(τ) candidates are detected in the recoil. We find evidence for B- → τ- ν(τ) with a significance of 3.0 standard deviations including systematic errors and measure a branching fraction B(B- → τ- ν(τ))=[0.72(-0.25)(+0.27)(stat)±0.11(syst)]×10(-4).

Published
2013
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18. Evidence forCPViolation in the DecayD+→KS0π+

Author

V.N. Zhilich, Andrey Sokolov, J. H. Kang, K. Nishimura, G. Bonvicini, T. Aushev, Y. Iwasaki, Y. J. Kwon, A. Vinokurova, J. Haba, James E. Fast, O. Schneider, M. Shapkin, P. Krokovny, J. Li, M. Röhrken, Tariq Aziz, G. Tatishvili, K. Cho, S. Okuno, S. L. Olsen, K. Chilikin, Yang Li, C. C. Zhang, Y. Watanabe, B.A. Shwartz, Y. Choi, T. Sumiyoshi, Z. Q. Liu, Sang Hoon Lee, Yongsun Kim, T. Sanuki, Yukinori Sato, J. G. Shiu, S. Uno, C. Schwanda, A. M. Bakich, M. Watanabe, Z. Natkaniec, T. Ohshima, R. Seidl, Y. B. Hsiung, W. Ostrowicz, M. C. Chang, M. Iwabuchi, L. E. Piilonen, G. Pakhlova, A. Ishikawa, E. Nakano, Y. Teramoto, T. Julius, Po-Hsun Chen, M. J. Kim, S. Nishida, I. S. Cho, M. Ritter, C. W. Park, A.L. Sibidanov, A. Garmash, Kevin Varvell, Anze Zupanc, Vladimir Zhulanov, R. Pestotnik, M. E. Sevior, M. Starič, B. R. Ko, C. L. Lim, T. Kawasaki, X. L. Wang, P. Križan, S. Uehara, Y. M. Goh, N. Gabyshev, T. Iijima, K. S. Park, Z. Drásal, C. H. Wang, M. Uchida, Y. S. Sohn, T. K. Pedlar, K. Trabelsi, Marko Petrič, C. P. Shen, Satoshi Tanaka, Y. Onuki, D. Liventsev, T. Kuhr, W. S. Hou, A. Moll, H. K. Park, Y. Yamashita, H. J. Hyun, P. Smerkol, H. Nakazawa, Yasushi Nagasaka, T. Mori, H. Aihara, A.E. Bondar, G. S. Varner, D. Matvienko, Y. Miyazaki, R. Itoh, O. Nitoh, P. Wang, A. J. Schwartz, T. A. Shibata, B. G. Cheon, K. Sakai, B. Bhuyan, M. Bischofberger, Norihito Muramatsu, T. E. Browder, D. M. Asner, Y. Hoshi, S.I. Eidelman, V. Vorobyev, V. Bhardwaj, R. Louvot, J. Libby, T. Tsuboyama, V.E. Shebalin, Z. Doležal, C. Liu, R. Mizuk, K. Hayasaka, V.M. Aulchenko, Yueh-Feng Liu, V. Gaur, M. Nakao, Yasuyuki Horii, K. T. Kim, C. Z. Yuan, G. B. Mohanty, Sunmin Ryu, Y. Unno, E. Won, I. Adachi, K. Kinoshita, K. Senyo, P. Pakhlov, A. Kuzmin, Z. P. Zhang, J. B. Kim, S. Ogawa, H. O. Kim, Hitoshi Yamamoto, A. Bozek, S. Koblitz, K. Belous, S. Korpar, Samo Stanič, Peter Kodys, B. Golob, J. S. Lange, Anton Poluektov, T. Iwashita, H. Hayashii, C. Kiesling, A. Chen, M. Bračko, Frank Simon, Y. Sakai, H. Sahoo, and E. Solovieva

Subjects
Physics, Particle physics, Annihilation, 010308 nuclear & particles physics, media_common.quotation_subject, Electron–positron annihilation, General Physics and Astronomy, 7. Clean energy, 01 natural sciences, Asymmetry, Luminosity, law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, CP violation, High Energy Physics::Experiment, 010306 general physics, Collider, media_common
Abstract

We observe evidence for CP violation in the decay D+ → K(S)(0)π+ using a data sample with an integrated luminosity of 977 fb(-1) collected by the Belle detector at the KEKB e+ e- asymmetric-energy collider. The CP asymmetry in the decay is measured to be (-0.363±0.094±0.067)%, which is 3.2 standard deviations away from zero, and is consistent with the expected CP violation due to the neutral kaon in the final state.

Published
2012
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19. Observation of New Resonant Structures inγγ→ωϕ,ϕϕ, andωω

Author

Marko Petrič, H. J. Hyun, P. Smerkol, Yukinori Sato, J. G. Shiu, D. Matvienko, J. Dalseno, Phillip Urquijo, Y. Miyazaki, I. S. Cho, T. Mori, H. Aihara, T. Aushev, J. Li, M. Ritter, C. P. Shen, D. M. Asner, Y. S. Sohn, P. Pakhlov, P. Kodý, L. E. Piilonen, R. Mussa, C. Liu, D. Epifanov, V.N. Zhilich, B. R. Ko, K. Senyo, A. Ishikawa, A. M. Bakich, T. Ohshima, G. Tatishvili, H. Hayashii, Frank Simon, G. Pakhlova, R. Mizuk, V. Gaur, C. W. Park, E. Nakano, A. Bozek, C. H. Wang, S. Koblitz, Yang Li, Y. Choi, M. Nakao, Z. Q. Liu, B.A. Shwartz, S. Uehara, Y. Iwasaki, T. K. Pedlar, B. G. Cheon, S. McOnie, B. Bhuyan, N. Gabyshev, A. Moll, M. Shapkin, K. Miyabayashi, Y. J. Kwon, O. Nitoh, T. E. Browder, H. J. Kim, T. Kawasaki, Andrey Sokolov, M. Uchida, T. Nozaki, O. Schneider, T. Julius, Po-Hsun Chen, R. Chistov, J. H. Kang, H. Nakazawa, P. Krian, M. Röhrken, T. Iijima, K. Nishimura, C. C. Zhang, D. Liventsev, K. Belous, J. S. Lange, S. Korpar, R. Seidl, Y. M. Goh, S. Nishida, Z. Doleal, M. Watanabe, James E. Fast, A.E. Bondar, H. Sahoo, G. S. Varner, X. L. Wang, C. Z. Yuan, H. K. Park, Y. Yamashita, Z. P. Zhang, H. O. Kim, T. Uglov, A. Vinokurova, R. Pestotnik, Vladimir Zhulanov, M. C. Chang, R. Itoh, Norihito Muramatsu, Z. Drásal, P. Krokovny, M. E. Sevior, R. Louvot, W. S. Hou, P. Wang, K. T. Kim, K. Cho, M. J. Kim, P. Chang, T. A. Shibata, H. Miyata, M. Iwabuchi, M. Bischofberger, Y. Sakai, S. K. Choi, Y. Hoshi, S.I. Eidelman, A. Garmash, K. Inami, M. Starič, V.E. Shebalin, V. Vorobyev, A. Kuzmin, T. Kumita, Y. Unno, K. Hayasaka, K. M. Williams, I. Adachi, A. Chen, V. Bhardwaj, C. Ng, T. Sumiyoshi, S. Ogawa, J. B. Kim, E. Solovieva, Sang Hoon Lee, Yasuyuki Horii, G. B. Mohanty, Yasushi Nagasaka, T. Sanuki, Sunmin Ryu, E. Won, J. Haba, Y. Yusa, J. Libby, S. L. Olsen, A.L. Sibidanov, K. Sakai, Y. B. Hsiung, X. R. Li, T. Iwashita, S. Okuno, Yongsun Kim, S. Uno, C. Schwanda, Y. Teramoto, C. Kiesling, M. Bračko, Samo Stanič, Y. Watanabe, Y. Onuki, and V.M. Aulchenko

Subjects
Physics, Nuclear physics, Particle physics, KEKB, Meson, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, High Energy Physics::Experiment, Vector meson, 010306 general physics, 01 natural sciences
Abstract

The processes γγ → ωϕ, ϕϕ, and ωω are measured using an 870 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. Production of vector meson pairs is clearly observed and their cross sections are measured for masses that range from threshold to 4.0 GeV. In addition to signals from well established spin-zero and spin-two charmonium states, there are resonant structures below charmonium threshold, which have not been previously observed. We report a spin-parity analysis for the new structures and determine the products of the η(c), χ(c0), and χ(c2) two-photon decay widths and branching fractions to ωϕ, ϕϕ, and ωω.

Published
2012
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20. Evidence for the η(b)(2S) and observation of h(b)(1P)→η(b)(1S)γ and h(b)(2P)→η(b)(1S)γ

Author

R, Mizuk, D M, Asner, A, Bondar, T K, Pedlar, I, Adachi, H, Aihara, K, Arinstein, V, Aulchenko, T, Aushev, T, Aziz, A M, Bakich, A, Bay, K, Belous, V, Bhardwaj, B, Bhuyan, M, Bischofberger, G, Bonvicini, A, Bozek, M, Bračko, J, Brodzicka, T E, Browder, V, Chekelian, A, Chen, P, Chen, B G, Cheon, K, Chilikin, R, Chistov, I-S, Cho, K, Cho, S-K, Choi, Y, Choi, J, Dalseno, M, Danilov, Z, Doležal, Z, Drásal, A, Drutskoy, S, Eidelman, D, Epifanov, J E, Fast, V, Gaur, N, Gabyshev, A, Garmash, B, Golob, J, Haba, T, Hara, K, Hayasaka, H, Hayashii, Y, Horii, Y, Hoshi, W-S, Hou, Y B, Hsiung, H J, Hyun, T, Iijima, A, Ishikawa, R, Itoh, M, Iwabuchi, Y, Iwasaki, T, Iwashita, I, Jaegle, T, Julius, J H, Kang, P, Kapusta, T, Kawasaki, H J, Kim, H O, Kim, J H, Kim, K T, Kim, M J, Kim, Y J, Kim, K, Kinoshita, B R, Ko, S, Koblitz, P, Kodyš, S, Korpar, R T, Kouzes, P, Križan, P, Krokovny, T, Kuhr, T, Kumita, A, Kuzmin, Y-J, Kwon, J S, Lange, S-H, Lee, J, Li, J, Libby, C, Liu, Y, Liu, Z Q, Liu, D, Liventsev, R, Louvot, D, Matvienko, S, McOnie, K, Miyabayashi, H, Miyata, G B, Mohanty, D, Mohapatra, A, Moll, N, Muramatsu, R, Mussa, M, Nakao, Z, Natkaniec, C, Ng, S, Nishida, K, Nishimura, O, Nitoh, T, Nozaki, T, Ohshima, S, Okuno, S L, Olsen, Y, Onuki, P, Pakhlov, G, Pakhlova, C W, Park, H, Park, R, Pestotnik, M, Petrič, L E, Piilonen, A, Poluektov, M, Röhrken, Y, Sakai, S, Sandilya, D, Santel, T, Sanuki, Y, Sato, O, Schneider, C, Schwanda, K, Senyo, O, Seon, M E, Sevior, M, Shapkin, C P, Shen, T-A, Shibata, J-G, Shiu, B, Shwartz, A, Sibidanov, F, Simon, P, Smerkol, Y-S, Sohn, A, Sokolov, E, Solovieva, S, Stanič, M, Starič, M, Sumihama, T, Sumiyoshi, K, Tanida, G, Tatishvili, Y, Teramoto, I, Tikhomirov, K, Trabelsi, T, Tsuboyama, M, Uchida, S, Uehara, T, Uglov, Y, Unno, S, Uno, P, Vanhoefer, G, Varner, K E, Varvell, A, Vinokurova, V, Vorobyev, C H, Wang, M-Z, Wang, P, Wang, X L, Wang, M, Watanabe, Y, Watanabe, K M, Williams, E, Won, B D, Yabsley, J, Yamaoka, Y, Yamashita, C Z, Yuan, Z P, Zhang, and V, Zhilich

Subjects
Photons, Quantum Theory, Nuclear Physics
Abstract

We report the first evidence for the η(b)(2S) using the h(b)(2P)→η(b)(2S)γ transition and the first observation of the h(b)(1P)→η(b)(1S)γ and h(b)(2P)→η(b)(1S)γ transitions. The mass and width of the η(b)(1S) and η(b)(2S) are measured to be m(η(b)(1S))=(9402.4±1.5±1.8) MeV/c(2), m(η(b)(2S))=(9999.0±3.5(-1.9)(+2.8)) MeV/c(2), and Γ(η(b)(1S))=(10.8(-3.7-2.0)(+4.0+4.5)) MeV. We also update the h(b)(1P) and h(b)(2P) mass measurements. We use a 133.4 fb(-1) data sample collected at energies near the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

Published
2012

21. Measurement ofB0→J/ψη(′)and constraint on theη−η′mixing angle

Author

D. M. Asner, G. Tatishvili, Z. Natkaniec, T. Ohshima, Y. Teramoto, Y. Yamashita, Z. Drásal, E. Solovieva, R. Mizuk, Zhenyu Zhang, K. T. Kim, A. Bozek, Anze Zupanc, M. Starič, Y. Watanabe, J. G. Shiu, S. K. Choi, S. Koblitz, A. Drutskoy, J. Dalseno, Phillip Urquijo, M. J. Kim, K. M. Williams, A. Ishikawa, H. Sahoo, Marko Petrič, Yasuyuki Horii, A. Chen, Y. Unno, Yongsun Kim, M. Nakao, C. Schwanda, C. W. Park, P. Križan, T. A. Shibata, T. Uglov, J. B. Kim, H. J. Hyun, P. Smerkol, T. Kumita, Leo Piilonen, T. E. Browder, M. Röhrken, K. Chilikin, B. G. Cheon, Frank Simon, K. S. Park, Y. Miyazaki, Andrey Sokolov, K. Nishimura, James E. Fast, A.E. Bondar, M. Sumihama, Y. C. Duh, S. H. Lee, S. Nishida, T. K. Pedlar, Semen Eidelman, A. Garmash, T. Iwashita, Pavel Krokovny, Y. Choi, Z. Doležal, Samo Stanič, A. Moll, Y. J. Kwon, T. Kuhr, H. Miyata, Samo Korpar, S. McOnie, Y. S. Sohn, B. Golob, Y. Iwasaki, R. Louvot, Satoshi Tanaka, I. S. Cho, B. Bhuyan, K. Senyo, K. Hayasaka, O. Schneider, E. Nakano, G. B. Mohanty, Z. Q. Liu, J. S. Lange, Y. Yusa, R. Pestotnik, T. Julius, Y. Sakai, O. Nitoh, Yasushi Nagasaka, S. L. Olsen, Po-Hsun Chen, C. P. Shen, Jolanta Brodzicka, R. Chistov, I. Nakamura, C. H. Wang, Peter Kodys, S. Uno, Hiroaki Aihara, T. Kawasaki, Sunmin Ryu, E. Won, V. Zhilich, K. Miyabayashi, Yang Li, T. Peng, J. Li, M. Bračko, C. Z. Yuan, Hitoshi Yamamoto, T. Hara, A.L. Sibidanov, R. Itoh, T. Sumiyoshi, W. S. Hou, P. Wang, Y. M. Goh, H. O. Kim, V. Vorobyev, H. Nakazawa, A. J. Schwartz, V. Bhardwaj, V. Gaur, Chang Liu, M. Shapkin, G. Varner, M. C. Chang, Y. Hoshi, Rakesh Kumar, M. Iwabuchi, Y. Usov, P. Chang, K. Adamczyk, Vladimir Zhulanov, M. E. Sevior, J. Haba, J. Y. Lin, K. Sakai, J. Libby, B. R. Ko, H. Hayashii, M. Z. Wang, K. Kinoshita, Norihito Muramatsu, Toru Iijima, K. F. Chen, S. Uehara, N. Katayama, S. Okuno, I. Adachi, A. M. Bakich, S. Ogawa, M. Uchida, G. Pakhlova, and Tagir Aushev

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, KEKB, Electron–positron annihilation, High Energy Physics::Experiment, Nuclear Experiment
Abstract

We measure the branching fractions of B-0 -> J/psi eta((')) decays with the complete Belle data sample of 772 x 10(6) B (B) over bar events collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The results for the branching fractions are: B(B-0 -> J/psi eta) = (12.3 +/-(1.8)(1.7)+/- 0.7) x 10(-6) and B(B-0 -> J/psi eta') < 7.4 x 10(-6) at 90% confidence level. The eta-eta' mixing angle is constrained to be less than 42.2 degrees at 90% confidence level.

Published
2012
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22. Search for time-dependentCPTviolation in hadronic and semileptonicBdecays

Author

J. Haba, T. Tsuboyama, B.A. Shwartz, Vladimir Zhulanov, M. E. Sevior, H. O. Kim, Tagir Aushev, J. Libby, Y. Onuki, H. Sahoo, D. M. Asner, Zhenyu Zhang, R. Louvot, A. Bozek, M. Watanabe, T. Uglov, M. Sumihama, H. J. Kim, S. H. Lee, Y. B. Hsiung, K. Cho, P. Wang, V.E. Shebalin, Stephen Lars Olsen, I. S. Cho, Norihito Muramatsu, Y. Yamashita, K. T. Kim, M. T. Prim, J. Dalseno, C. Kiesling, S. K. Choi, Y. Li, Y. Iwasaki, A. Vinokurova, Pavel Krokovny, Toru Iijima, O. Nitoh, K. Belous, T. Kuhr, T. Ohshima, T. Iwashita, Satoshi Tanaka, H. Miyata, Y. S. Sohn, O. Schneider, M. Bischofberger, H. K. Park, V.M. Aulchenko, K. Sumisawa, D. Epifanov, M. Uchida, A.L. Sibidanov, Y. Sakai, Y. Sato, G. Pakhlova, P. Chang, G. Tatishvili, A.S. Kuzmin, Yasuyuki Horii, Marko Petrič, W. S. Hou, K. S. Park, O. Brovchenko, K. Hayasaka, S. Stanič, H. J. Hyun, P. Smerkol, T. Julius, G. B. Mohanty, A. Moll, Peter Kodys, G. Varner, Hiroaki Aihara, D. Liventsev, Y. Teramoto, Po-Hsun Chen, B. G. Cheon, Y. Hoshi, D. Matvienko, Z. Natkaniec, S. Okuno, E. Won, C. Z. Yuan, Y. Miyazaki, A.E. Bondar, K. Trabelsi, R. Chistov, P. Kapusta, S. Ogawa, B Bhuyan, I. Adachi, Kevin Varvell, Samo Korpar, C. P. Shen, Y. Nakahama, X. L. Wang, Phillip Urquijo, M. Ritter, T. A. Shibata, S. Nishida, M. Bračko, T. Sumiyoshi, A. M. Bakich, R. Seidl, J. H. Kang, E. Solovieva, Y. Watanabe, T. Mori, Bruce Yabsley, T. Kumita, P. Pakhlov, Y. Usov, Y. Choi, Z. Doležal, T. E. Browder, V. Gaur, M. Shapkin, V. Zhilich, R. Itoh, Leo Piilonen, Yongsun Kim, Sadaharu Uehara, J. B. Kim, C. Schwanda, M. C. Chang, Z. Q. Liu, J. Li, M. Starič, N. Gabyshev, Y. J. Kwon, J. G. Shiu, S. Koblitz, R. Sinha, J. E. Fast, B. R. Ko, Z. Drásal, M. Danilov, H. Hayashii, K. M. Williams, A. Chen, Y. Unno, K. Hara, K. Chilikin, R. Pestotnik, Y. M. Goh, K. Inami, Y. Yusa, M. Röhrken, V. Bhardwaj, B. Golob, H. Nakazawa, A. J. Schwartz, J. S. Lange, Chang Liu, V. Vorobyev, T. Higuchi, S. Uno, M. J. Kim, Sunmin Ryu, S. McOnie, K. Miyabayashi, T. Sanuki, Hitoshi Yamamoto, A. Garmash, T. Kawasaki, C. Ng, K. Senyo, C. H. Wang, Yasushi Nagasaka, A. Ishikawa, A. Bay, T. Nozaki, M. Nakao, C. W. Park, P. Križan, Andrey Sokolov, K. Nishimura, and Semen Eidelman

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Single measurement, Hadron, Resonance, 01 natural sciences, law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Collider
Abstract

We report a new sensitive search for C P T violation, which includes improved measurements of the C P T-violating parameter z and the total decay-width difference normalized to the averaged width delta(d) delta(d) of the two B-d mass eigenstates . The results are based on a data sample of 535 x 10(6) B B pairs collected at the Epsilon(4 S) resonance with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. We obtain Re (z) = [+1.9 +/- 3.7 (stat) +/- 3.3 (syst)] x 10(>-2), qm (z) = [-5.7 +/- 3.3 (stat) +/- 3.3 (syst)] x 10(-3), and delta(d) / delta(d) = [-1.7 +/- 1.8 (stat) +/- 1.1 (syst)] x 10(-2), all of which are consistent with zero. This is the most precise single measurement of these parameters in the neutral B-meson system to date.

Published
2012
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23. Measurement of theCP-Violation Parametersin 2ϕ1with a New Tagging Method at theΥ(5S)Resonance

Author

R. Mizuk, K. T. Kim, Andrey Sokolov, C. Liu, S. K. Choi, B. G. Cheon, W. Ostrowicz, K. Nishimura, H. Kichimi, Marko Petrič, M. Uchida, V. Gaur, G. S. Varner, R. Itoh, P. Wang, M. Nakao, James E. Fast, G. B. Mohanty, H. J. Hyun, T. Kawasaki, I. S. Cho, P. Smerkol, O. Nitoh, T. Sumiyoshi, S. McOnie, H. Nakazawa, E. Nakano, Y. Yusa, Sang Hoon Lee, H. J. Kim, A.E. Bondar, A. J. Schwartz, S. Korpar, B.A. Shwartz, C. Kiesling, T. A. Shibata, H. Miyata, M. Bischofberger, Nagao Kobayashi, D. M. Asner, T. Sanuki, Y. Hoshi, Z. P. Zhang, Z. Doleal, H. O. Kim, J. Stypula, Z. Q. Liu, S.I. Eidelman, C. H. Wang, M. Bračko, L. E. Piilonen, G. Pakhlova, Yukinori Sato, A. Ishikawa, H. K. Park, C. W. Park, H. Sahoo, Y. Yamashita, J. G. Shiu, Vladimir Zhulanov, G. Tatishvili, M. E. Sevior, S. Nishida, J. Dalseno, K. Hayasaka, T. Uglov, Sunmin Ryu, P. Krokovny, T. Aushev, Y. Watanabe, Phillip Urquijo, P. Kapusta, S. Okuno, Satoshi Tanaka, E. Won, K. Cho, T. Julius, Yasuyuki Horii, Kevin Varvell, Po-Hsun Chen, Norihito Muramatsu, R. Chistov, Anze Zupanc, S. K. Kim, D. Epifanov, X. L. Wang, J. Li, H. Aihara, R. Louvot, Y. Teramoto, Bruce Yabsley, R. Seidl, T. Kuhr, A. Kuzmin, Hitoshi Yamamoto, B. R. Ko, Samo Stanič, J. Haba, O. Seon, Frank Simon, T. Iwashita, Y. Onuki, S. Ogawa, V. Bhardwaj, T. K. Pedlar, Tariq Aziz, Y. Sakai, Y. Unno, S. L. Olsen, Yang Li, A. Moll, A. M. Bakich, Z. Natkaniec, T. Ohshima, Y. S. Sohn, Y. Choi, T. Hara, V.N. Zhilich, A.L. Sibidanov, J. B. Kim, P. Chang, Rakesh Kumar, B. Golob, E. Solovieva, K. Senyo, N. Gabyshev, M. Watanabe, B. Bhuyan, Jung-Hyun Kim, P. Krian, V.M. Aulchenko, M. Iwabuchi, T. E. Browder, J. S. Lange, Y. M. Goh, K. Miyabayashi, K. Trabelsi, C. P. Shen, W. S. Hou, J. Wicht, Yongsun Kim, P. Pakhlov, S. Uno, C. Schwanda, H. Park, A. Bozek, M. Sumihama, P. Kody, M. J. Kim, M. Starič, T. Kumita, Y. Iwasaki, Y. J. Kwon, M. Z. Wang, K. Kinoshita, O. Schneider, M. Shapkin, M. Röhrken, K. Chilikin, Anton Poluektov, Z. Drásal, and H. Hayashii

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, media_common.quotation_subject, General Physics and Astronomy, Resonance, Charge (physics), 01 natural sciences, Asymmetry, law.invention, Nuclear physics, KEKB, Pion, law, 0103 physical sciences, CP violation, High Energy Physics::Experiment, B meson, 010306 general physics, Collider, media_common
Abstract

We report a measurement of the CP-violation parameter sin2 phi(1) at the gamma(5S) resonance using a new tagging method, called "B-pi tagging." In gamma(5S) decays containing a neutral B meson, a charged B, and a charged pion, the neutral B is reconstructed in the J/psi K-S(0) CP-eigenstate decay channel. The initial flavor of the neutral B meson at the moment of the gamma(5S) decay is opposite to that of the charged B and may thus be inferred from the charge of the pion without reconstructing the charged B. From the asymmetry between B-pi(+) and B-pi(-) tagged J/psi K-S(0) yields, we determine sin2 phi(1) 0.57 +/- 0.58(stat) +/- 0.06(syst). The results are based on 121 fb(-1) of data recorded by the Belle detector at the KEKB e(+) e(-) collider.

Published
2012
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24. Precise Measurement of theCPViolation Parametersin 2ϕ1inB0→(cc¯)K0Decays

Author

R. Mizuk, H. K. Park, Z. Q. Liu, Y. Yamashita, E. Nakano, Yukinori Sato, C. Liu, J. G. Shiu, K. Sumisawa, P. Kapusta, S. Okuno, J. Dalseno, Frank Simon, V. Gaur, M. Nakao, Y. Teramoto, M. Yamauchi, S. McOnie, A. Vinokurova, P. Krokovny, D. Epifanov, Bruce Yabsley, K. Cho, B. R. Ko, O. Nitoh, Norihito Muramatsu, H. J. Kim, M. Rozanska, L. E. Piilonen, K. S. Park, T. K. Pedlar, G. Tatishvili, H. Nakazawa, B. Golob, Y. F. Liu, G. Pakhlova, Satoshi Tanaka, T. Iijima, P. Krian, A.E. Bondar, A. J. Schwartz, P. Pakhlov, M. Starič, T. Kumita, J. S. Lange, V. Bhardwaj, Z. Doleal, B. G. Cheon, Z. P. Zhang, I. Tikhomirov, K. M. Williams, Y. Unno, S. L. Olsen, C. H. Wang, H. O. Kim, T. Julius, S. E. Vahsen, T. Kuhr, A. Kuzmin, G. B. Mohanty, T. Iwashita, Po-Hsun Chen, Y. Sakai, R. Chistov, V.N. Zhilich, A. Bozek, Y. Iwasaki, W. S. Hou, J. Haba, S. Koblitz, M. Röhrken, K. Chilikin, Y. Yusa, H. Ozaki, S. Ogawa, Y. J. Kwon, S. Korpar, Anze Zupanc, S. Neubauer, K. T. Kim, S. Uehara, K. Miyabayashi, O. Schneider, K. Senyo, B. Bhuyan, M. Watanabe, J. B. Singh, N. Katayama, S. K. Choi, Kevin Varvell, V. Vorobyev, Marko Petrič, T. E. Browder, H. J. Hyun, P. Smerkol, T. Sumiyoshi, Y. B. Hsiung, Tariq Aziz, Yang Li, T. Kawasaki, E. Solovieva, Jung-Hyun Kim, Yongsun Kim, Sang Hoon Lee, A. Garmash, S. Uno, Y. Choi, I. Adachi, A. Ishikawa, A. Bay, T. Hara, R. Pestotnik, T. Mori, H. Aihara, B.A. Shwartz, M. Danilov, T. Higuchi, Z. Drásal, C. Schwanda, D. Matvienko, Y. Miyazaki, J. B. Kim, T. Sanuki, M. Uchida, Y. M. Goh, K. Hara, D. M. Asner, Y. S. Sohn, E. Won, K. Trabelsi, C. P. Shen, S. Nishida, D. Liventsev, Andrey Sokolov, A.L. Sibidanov, H. Sahoo, T. Uglov, G. S. Varner, Hitoshi Yamamoto, K. Nishimura, T. Aushev, T. A. Shibata, H. Miyata, Rakesh Kumar, M. Bischofberger, Y. Hoshi, S.I. Eidelman, R. Itoh, James E. Fast, M. Iwabuchi, P. Wang, K. Hayasaka, J. Li, Yasuyuki Horii, R. Louvot, K. Sakai, V.E. Shebalin, H. Kichimi, T. Tsuboyama, Anton Poluektov, H. Hayashii, M. Z. Wang, K. Kinoshita, Y. Watanabe, Y. Onuki, V.M. Aulchenko, O. Zyukova, M. Sumihama, P. Kody, Y. Ushiroda, C. Kiesling, M. Bračko, Samo Stanič, A. M. Bakich, T. Ohshima, and N. Gabyshev

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

We present a precise measurement of the CP violation parameter sin2 phi(1) and the direct CP violation parameter A(f) using the final data sample of 772 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. One neutral B meson is reconstructed in a J/psi K-S(0), psi(2S)K-S(0), chi K-c1(S)0, or J/psi K-L(0) CP eigenstate an(its flavor is identified from the decay products of the accompanying B meson. From the distribution of proper-time intervals between the two B decays, we obtain the following CP violation parameters: sin2 phi(1) 0.667 +/- 0.023(stat) +/- 0.012(syst) and A(f) = 0.006 +/- 0.016(stat) +/- 0.012(syst).

Published
2012
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25. Search for double charmonium decays of theP-wave spin-triplet bottomonium states

Author

S. Uno, D. M. Asner, I. S. Cho, T. Sanuki, Stephen Lars Olsen, E. Nakano, S. Ogawa, T. Hara, P. Krian, J. S. Lange, O. Nitoh, B Bhuyan, Z. Q. Liu, S. Okuno, T. Ohshima, K. T. Kim, K. Arinstein, Y. M. Goh, R. Mizuk, I. Adachi, Anze Zupanc, C. H. Wang, J. Haba, H. K. Park, T. Sumiyoshi, S. Koblitz, A. M. Bakich, P. Krokovny, A. Drutskoy, T. Julius, R. Chistov, H. Sahoo, Jasvinder A. Singh, H. Miyata, Phillip Urquijo, M. Ritter, M. Bischofberger, T. A. Shibata, K. Hayasaka, S. Stanič, Leo Piilonen, Marko Petrič, H. J. Hyun, P. Smerkol, C. L. Lim, H. J. Kim, Y. S. Sohn, B. G. Cheon, Y. Yusa, M. Röhrken, Y. Miyazaki, Yongsun Kim, R. Mussa, G. B. Mohanty, Y. Choi, Vladimir Zhulanov, G. Tatishvili, W. S. Hou, A. Ishikawa, C. Schwanda, Samo Korpar, Norihito Muramatsu, Kevin Varvell, M. Nakao, T. K. Pedlar, A. Moll, J. Libby, C. W. Park, Zhenyu Zhang, O. Seon, Frank Simon, Hiroaki Aihara, D. Liventsev, K. Cho, Toru Iijima, S. K. Choi, X. L. Wang, A.L. Sibidanov, C. Z. Yuan, J. H. Kang, E. Won, Y. Watanabe, V. Gaur, M. Shapkin, M. Watanabe, S. H. Lee, M. Uchida, T. Mori, K. Nishimura, G. Varner, G. Pakhlova, M. C. Chang, A. Bozek, Yasuyuki Horii, Y. Hoshi, T. Iwashita, M. Iwabuchi, Semen Eidelman, Y. Sakai, Y. Sato, T. Tsuboyama, R. Itoh, S. Nishida, Sadaharu Uehara, J. B. Kim, Y. Teramoto, H. O. Kim, R. Louvot, P. Wang, N. Gabyshev, Y. J. Kwon, E. Solovieva, J. Dalseno, A. Garmash, C. P. Shen, T. Kawasaki, V. Zhilich, J. Li, K. Senyo, M. J. Kim, S. McOnie, K. Miyabayashi, H. Nakazawa, M. Starič, Chang Liu, J. G. Shiu, Tagir Aushev, Y. Onuki, Y. Yamashita, P. Kody, M. Bračko, Anton Poluektov, J. E. Fast, B. R. Ko, Z. Drásal, H. Hayashii, T. Kumita, T. E. Browder, O. Schneider, A. Chen, Y. Unno, and K. Chilikin

Subjects
Quantum chromodynamics, Physics, Identification, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Belle, FOS: Physical sciences, 01 natural sciences, Kekb, High Energy Physics - Experiment, 3. Good health, Nuclear physics, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), Formalism (philosophy of mathematics), High Energy Physics - Phenomenology (hep-ph), KEKB, Factorization, Light cone, 0103 physical sciences, Mass spectrum, High Energy Physics::Experiment, 010306 general physics
Abstract

Using a sample of 158�106 ?(2S) events collected with the Belle detector, we search for the first time for double-charmonium decays of the P-wave spin-triplet bottomonium states (?(2S) ??? bJ, ? bJ?J/?J/?, J/?? ?, ? ?? ? for J=0, 1, and 2). No significant ? bJ signal is observed in the double-charmonium mass spectra, and we obtain the following upper limits: B(? bJ?J/?J/?)&lt, 7.1�10 -5, 2.7�10 -5, 4.5�10 -5, B(? bJ? J/?? ?)&lt, 1.2�10 -4, 1.7�10 -5, 4.9�10 -5, B(? bJ?? ?? ?)&lt, 3. 1�10 -5, 6.2�10 -5, 1.6�10 -5 for J=0, 1, and 2, respectively, at the 90% confidence level. These limits are significantly lower than the central values (with uncertainties of 50% to 70%) predicted using the light cone formalism but are consistent with calculations using the nonrelativistic QCD (NRQCD) factorization approach. � 2012 American Physical Society.

Published
2012
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26. Observation of Two Charged Bottomoniumlike Resonances inΥ(5S)Decays

Author

R. Louvot, V.E. Shebalin, Yongsun Kim, C. Schwanda, I. Adachi, A. Garmash, J. B. Kim, O. Nitoh, G. Tatishvili, Z. Doleal, B.A. Shwartz, Norihito Muramatsu, K. T. Kim, B. G. Cheon, K. Arinstein, R. Mizuk, Vladimir Zhulanov, M. E. Sevior, M. Niiyama, A. Vinokurova, S. E. Vahsen, S. K. Choi, C. Z. Yuan, J. Haba, T. Iwashita, C. Liu, T. Nozaki, Anze Zupanc, S. L. Olsen, T. Iijima, K. Belous, S. Korpar, Sunmin Ryu, Y. Iwasaki, H. Kichimi, Marko Petrič, H. J. Hyun, P. Smerkol, E. Won, Y. Onuki, V. Gaur, S. Uehara, O. Schneider, Frank Simon, T. Kuhr, J. Libby, Z. Q. Liu, K. Cho, D. Matvienko, Y. Miyazaki, Nagao Kobayashi, M. Nakao, S. McOnie, J. G. Shiu, K. Senyo, E. L. Barberio, J. Dalseno, T. Kawasaki, O. Zyukova, M. Yamauchi, D. M. Asner, H. Sahoo, M. C. Chang, A. M. Bakich, Z. Natkaniec, D. Epifanov, M. Uchida, B. R. Ko, Rakesh Kumar, M. Ritter, T. Uglov, D. Santel, M. T. Prim, M. Iwabuchi, N. Gabyshev, M. Sumihama, M. Z. Wang, K. Kinoshita, P. Kody, D. Liventsev, T. A. Shibata, H. Miyata, M. J. Kim, M. Bischofberger, Y. Ushiroda, V. Bhardwaj, T. K. Pedlar, Y. Hoshi, A. Moll, S.I. Eidelman, Satoshi Tanaka, G. S. Varner, M. Starič, T. Kumita, Y. Sakai, K. Hayasaka, C. Kiesling, P. Chang, A.E. Bondar, T. Sumiyoshi, A. Kuzmin, H. Aihara, Y. Watanabe, P. Wang, I. S. Cho, Sang Hoon Lee, Jung-Hyun Kim, M. Bračko, B. Golob, Z. P. Zhang, T. Sanuki, L. E. Piilonen, E. Solovieva, G. Pakhlova, P. Krian, C. H. Wang, T. Aushev, M. Shapkin, J. S. Lange, M. Röhrken, K. Chilikin, K. Inami, J. Li, Y. Teramoto, Bruce Yabsley, Anton Poluektov, H. K. Park, Y. Yamashita, T. Julius, R. Chistov, I. Tikhomirov, K. M. Williams, A. Chen, Andrey Sokolov, J. H. Kang, K. Nishimura, James E. Fast, R. Mussa, A. Ishikawa, V.N. Zhilich, S. Neubauer, Y. S. Sohn, T. E. Browder, M. Danilov, P. Pakhlov, H. Park, A. Bozek, S. Koblitz, A. Drutskoy, S. Nishida, X. L. Wang, Tariq Aziz, Yang Li, Y. Choi, T. Hara, Y. M. Goh, G. B. Mohanty, and Y. Yusa

Subjects
Physics, 010308 nuclear & particles physics, Electron–positron annihilation, Analytical chemistry, General Physics and Astronomy, Resonance, Dalitz plot, Elementary particle, 01 natural sciences, 7. Clean energy, law.invention, Nuclear physics, KEKB, Pion, law, 0103 physical sciences, Mass spectrum, 010306 general physics, Collider
Abstract

We report the observation of two narrow structures in the mass spectra of the pi(+/-) Y(nS) (n = 1, 2, 3) and pi(+/-) h(b)(mP) (m = 1, 2) pairs that are produced in association with a single charged pion in Y(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M-1 = (10 607.2 +/- 2.0) MeV/c(2), Gamma(1) =(18.4 +/- 2.4) MeV, and M-2 = (10 652.2 +/- 1.5) MeV/c(2), Gamma(2) = (11.5 +/- 2.2) MeV. The results are obtained with a 121.4 fb(-1) data sample collected with the Belle detector in the vicinity of the Y(5S) resonance at the KEKB asymmetric-energy e(+)e(-) collider.

Published
2012
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27. Search forCPViolation inD±Meson Decays toϕπ±

Author

T. A. Shibata, H. Miyata, Y. Hoshi, S.I. Eidelman, K. Hayasaka, S. L. Olsen, Y. B. Hsiung, M. Z. Wang, K. Kinoshita, K. Arinstein, C. Kiesling, H. K. Park, W. S. Hou, Y. Yamashita, Z. Q. Liu, Marko Petrič, T. Aushev, O. Nitoh, L. E. Piilonen, S. Nishida, G. Pakhlova, J. G. Shiu, P. Smerkol, M. Uchida, M. J. Kim, M. Röhrken, K. Chilikin, G. B. Mohanty, Nagao Kobayashi, H. Sahoo, T. Iijima, A. J. Schwartz, M. Starič, T. Uglov, Andrey Sokolov, T. Kumita, S. Uehara, K. T. Kim, J. H. Kang, Y. Miyazaki, Y. Sakai, G. S. Varner, T. Julius, C. Z. Yuan, R. Louvot, Phillip Urquijo, R. Pestotnik, I. S. Cho, V.E. Shebalin, Po-Hsun Chen, Sunmin Ryu, R. Chistov, E. Won, R. Itoh, Z. Drásal, James E. Fast, V.N. Zhilich, Peter Kodys, D. M. Asner, Y. Iwasaki, Y. J. Kwon, H. Aihara, K. Trabelsi, K. Sumisawa, J. Li, C. H. Wang, Yasuyuki Horii, Yang Li, O. Schneider, C. P. Shen, K. Miyabayashi, J. B. Kim, C. Liu, G. Tatishvili, Y. Choi, K. Inami, A. Ishikawa, A. Bay, E. Nakano, A. Bozek, V. Gaur, A. Vossen, S. Koblitz, Yongsun Kim, S. Uno, C. Schwanda, B. G. Cheon, B. Golob, P. Križan, C. C. Zhang, Z. Doležal, M. Watanabe, M. Iwabuchi, T. Kawasaki, O. Seon, Frank Simon, B. Bhuyan, S. McOnie, J. S. Lange, H. J. Kim, T. E. Browder, T. Nozaki, K. M. Williams, A. Chen, Anze Zupanc, Y. S. Sohn, Z. P. Zhang, H. O. Kim, S. Korpar, Sang Hoon Lee, Y. Unno, T. Sanuki, T. Iwashita, M. Sumihama, Y. Watanabe, S. Okuno, Y. Teramoto, Bruce Yabsley, J. Libby, M. Bračko, A. M. Bakich, Z. Natkaniec, T. Ohshima, N. Gabyshev, Samo Stanič, J. Haba, K. Cho, B. R. Ko, K. Sakai, K. S. Park, V. Bhardwaj, B.A. Shwartz, Vladimir Zhulanov, and M. E. Sevior

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

We search for CP violation in Cabibbo-suppressed charged D meson decays by measuring the difference between the CP-violating asymmetries for the Cabibbo-suppressed decays D(±)→K(+)K(-)π(±) and the Cabibbo-favored decays D(s)(±)→K(+)K(-)π(±) in the K(+)K(-) mass region of the ϕ resonance. Using 955 fb(-1) of data collected with the Belle detector, we obtain A(CP)(D+→ϕπ+)=(+0.51±0.28±0.05)%. The measurement improves the sensitivity of previous searches by more than a factor of 5. We find no evidence for direct CP violation.

Published
2012
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28. Search for charmonium and charmoniumlike states inΥ(2S)radiative decays

Author

I. S. Cho, S. Okuno, M. Z. Wang, K. Kinoshita, H. Sahoo, M. Shapkin, M. Yamauchi, Y. Iwasaki, T. Aushev, R. Louvot, C. H. Wang, Zhenyu Zhang, K. T. Kim, K. Chilikin, G. B. Mohanty, Y. J. Kwon, T. Iwashita, Y. Teramoto, Y. Watanabe, O. Schneider, Bruce Yabsley, P. Pakhlov, Marko Petrič, A.S. Kuzmin, T. Iijima, V.N. Zhilich, H. J. Hyun, R. Pestotnik, P. Smerkol, H. Park, O. Nitoh, J. Haba, K. Belous, A. Bozek, S. Koblitz, Sang Hoon Lee, S.I. Eidelman, H. K. Park, O. Seon, Frank Simon, H. Hayashii, Y. Yamashita, Yasushi Nagasaka, Jung-Hyun Kim, Y. Onuki, M. J. Kim, B. Bhuyan, T. E. Browder, B. G. Cheon, Y. Sakai, M. Starič, Yang Li, S. Ogawa, J. Libby, T. Sanuki, K. Miyabayashi, S. Neubauer, K. Cho, A. Chen, J. H. Kang, K. Nishimura, M. Sumihama, Y. Choi, Hiroaki Aihara, J. S. Lange, D. Matvienko, M. Danilov, Y. M. Goh, Y. Miyazaki, E. Solovieva, H. Kichimi, E. L. Barberio, J. G. Shiu, Sunmin Ryu, J. Dalseno, B. R. Ko, K. Trabelsi, E. Won, R. Mussa, S. Nishida, J. Li, C. Z. Yuan, C. P. Shen, A. Ishikawa, J.E. Fast, T. K. Pedlar, D. M. Asner, X. L. Wang, B.A. Shwartz, P. Križan, M. Ritter, M. C. Chang, Z. Doležal, V. Gaur, Y. S. Sohn, M. E. Sevior, G. Tatishvili, H. Nakazawa, M. Iwabuchi, L. E. Piilonen, M. Nakao, G. Pakhlova, M. Uchida, H. J. Kim, S. McOnie, Chang Liu, T. Julius, D. Liventsev, H. O. Kim, Yoshinobu Unno, G. S. Varner, M. Feindt, S. L. Olsen, Y. Usov, R. Itoh, Y. B. Hsiung, P. Wang, Yongsun Kim, S. Uno, C. Schwanda, N. Kobayashi, T. A. Shibata, H. Miyata, Y. Hoshi, K. Hayasaka, K. Senyo, C. L. Lim, T. Kawasaki, Samo Stanič, M. Bračko, A. M. Bakich, Z. Natkaniec, T. Ohshima, X. R. Li, S. Uehara, N. Katayama, I. Adachi, and J. B. Kim

Subjects
Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, Analytical chemistry, Omega baryon, Quarkonium, 01 natural sciences, Omega, Nuclear physics, Charmed baryons, 0103 physical sciences, B meson, 010306 general physics, X(3872)
Abstract

Using a sample of 158 x 10(6) gamma (2S) events collected with the Belle detector, charmonium and charmoniumlike states with even charge parity are searched for in gamma (2S) radiative decays. No significant chi(cJ) or eta(c) signal is observed, and the following upper limits at 90% confidence level (C. L.) are obtained: B(gamma(2S)-> gamma chi(c0)) gamma chi(c1)) gamma chi(c2)) gamma eta(c)) gamma X(3872)) x B(X(3872) -> pi(+)pi(-) J/psi) gamma X(3872)) x B(X(3872) -> pi(+)pi(-)pi(0) J/psi) gamma X(3915)) x B(X(3915) -> omega J/psi) gamma Y(4140)) x B(Y(4140) -> phi J/psi) gamma X(4350) x B(X(4350) -> phi J/psi)) < 1.3 x 10(-6) at 90% C. L.

Published
2011
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29. First observation of radiativeB0→ϕK0γdecays and measurements of their time-dependentCPviolation

Author

K. Kinoshita, K. Inami, H. Hayashii, J. Li, Y. Watanabe, Yang Li, Y. Choi, A.E. Bondar, T. A. Shibata, H. Miyata, Y. Hoshi, S.I. Eidelman, S. E. Vahsen, S. Nishida, Jung-Hyun Kim, G. B. Mohanty, Y. S. Sohn, K. T. Kim, K. Hayasaka, A. J. Schwartz, J. Libby, Y. Iwasaki, M. Sumihama, P. Kody, Y. Ushiroda, S. L. Olsen, T. Iwashita, K. Trabelsi, T. Iijima, Y. J. Kwon, Marko Petrič, S. K. Kim, O. Brovchenko, H. J. Hyun, M. T. Prim, P. Smerkol, Y. Onuki, V.N. Zhilich, N. J. Joshi, Ping Zhou, Y. B. Hsiung, Sunmin Ryu, S. Okuno, O. Schneider, Y. Unno, K. Miyabayashi, T. Kuhr, E. Won, Yasuyuki Horii, I. Adachi, O. Seon, Frank Simon, V.M. Aulchenko, K. M. Williams, A. Chen, P. Pakhlov, J. B. Kim, E. L. Barberio, Z. Q. Liu, Y. Teramoto, Bruce Yabsley, D. Matvienko, A. Vinokurova, M. Shapkin, O. Nitoh, Y. Miyazaki, M. Röhrken, J. Haba, A. Bozek, D. M. Asner, S. Koblitz, K. Senyo, K. Cho, C. L. Lim, B. Bhuyan, G. Tatishvili, B.A. Shwartz, T. Kawasaki, M. J. Kim, T. E. Browder, D. Epifanov, R. Pestotnik, M. Starič, Z. Doleal, B. R. Ko, M. Uchida, P. Krian, Z. Drásal, T. Kumita, Y. Sakai, Vladimir Zhulanov, J. S. Lange, A. Kuzmin, D. Liventsev, M. E. Sevior, V. Bhardwaj, T. Nozaki, C. Z. Yuan, Anze Zupanc, W. S. Hou, G. S. Varner, Y. Yusa, E. Solovieva, R. Itoh, Yongsun Kim, S. Uno, C. Schwanda, Nagao Kobayashi, J. G. Shiu, H. Sahoo, T. Uglov, J. Dalseno, R. Mizuk, K. Sumisawa, B. G. Cheon, S. Suzuki, K. Belous, S. Korpar, R. Louvot, V.E. Shebalin, V. Gaur, M. Nakao, S. McOnie, H. J. Kim, Z. P. Zhang, H. O. Kim, C. Ng, Rakesh Kumar, M. Iwabuchi, T. Mori, T. Sumiyoshi, Sang Hoon Lee, T. Sanuki, L. E. Piilonen, G. Pakhlova, T. Julius, Po-Hsun Chen, A. M. Bakich, Z. Natkaniec, T. Ohshima, N. Gabyshev, Andrey Sokolov, J. H. Kang, K. Nishimura, James E. Fast, Samo Stanič, A. Ishikawa, C. Kiesling, C. W. Park, M. J. Lee, T. Peng, M. Bračko, K. Sakai, C. C. Zhang, M. Watanabe, H. K. Park, and Y. Yamashita

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Gamma ray, 01 natural sciences, Nuclear physics, Particle decay, Positron, KEKB, 0103 physical sciences, CP violation, B meson, 010306 general physics
Abstract

We report the first observation of the radiative decay B-0 -> phi K-0 gamma using a data sample of 772 x 10(6) B (B) over bar pairs collected at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a signal of 37 +/- 8 events with a significance of 5.4 standard deviations including systematic uncertainties. The measured branching fraction is B(B-0 ->phi K-0 gamma) = (2.74 +/- 0.60 +/- 0.32) x 10(-6), where the uncertainties are statistical and systematic, respectively. We also report the first measurements of time-dependent CP-violation parameters: S-phi K0s gamma = +0.74(-1.05)(+0.72)(stat)(-0.024)(+0.10)(syst) and A phi(0)(Ks)gamma = +0.35 +/- 0.58(stat)(-0.10)(+0.23)(syst). Furthermore, we measure B(B+ -> phi K+gamma) = (2.48 +/- 0.30 +/- 0.24) x 10(-6), A(CP) = -0.03 +/- 0.11 +/- 0.08, and find that the signal is concentrated in the M-phi K mass region near threshold.

Published
2011
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30. Bounds on the width, mass difference and other properties ofX(3872)→π+π−J/ψdecays

Author

S. Eidelman, T. Aushev, P. Pakhlov, V.N. Zhilich, S. Uehara, Byeong Rok Ko, L. E. Piilonen, A. Kuzmin, N. Katayama, Marko Petrič, J. Libby, S. Neubauer, K. Miyabayashi, S. Okuno, G. Pakhlova, H. J. Hyun, P. Smerkol, Y. Teramoto, Y. Choi, Bruce Yabsley, A. Garmash, H. Park, A. Bozek, S. Koblitz, S. Ogawa, D. Matvienko, P. Chang, Y. Miyazaki, I. Adachi, T. Hara, M. Sumihama, Jung-Hyun Kim, D. M. Asner, Xiuwan Li, K. Senyo, C. L. Lim, T. Kawasaki, K. M. Williams, A. Chen, T. Julius, Po-Hsun Chen, Kevin Varvell, K. Kinoshita, J. G. Shiu, Z. Natkaniec, Z. Drásal, A. Drutskoy, T. Iijima, Y. M. Goh, Y. Onuki, Y. Sakai, G. Tatishvili, C. C. Zhang, M. Uchida, Yasushi Nagasaka, O. Zyukova, J. Li, A. Zupanc, K. Trabelsi, A. Vinokurova, Sunmin Ryu, J. B. Kim, E. Nakano, M. Watanabe, Meng Wang, D. Liventsev, R. Mussa, B. Bhuyan, H. Aihara, A.E. Bondar, Anton Poluektov, E. Won, G. S. Varner, Nagao Kobayashi, T. Kuhr, T. E. Browder, S. K. Kim, M. Shapkin, A. Ishikawa, A. Bay, M. Röhrken, K. Chilikin, H. O. Kim, K. Sakai, Y. Watanabe, Z. Doležal, O. Brovchenko, Samo Stanič, H. Kichimi, E. L. Barberio, Y. J. Kim, P. Križan, Y. S. Sohn, T. Sumiyoshi, O. Nitoh, Jeremy Dalseno, C. Liu, K. Cho, V. Gaur, Y. B. Hsiung, R. Itoh, H. Sahoo, P. Wang, H. Hayashii, Hyunyong Kim, K. T. Kim, N. J. Joshi, Y. B. Li, Andrey Sokolov, T. Uglov, T.-A. Shibata, M. Nakao, T. Sanuki, A. M. Bakich, C. Z. Yuan, J. B. Singh, S. K. Choi, E. Solovieva, M. Iwabuchi, A. J. Schwartz, S. H. Lee, H. Miyata, T. Ohshima, T. Iwashita, S. McOnie, J. H. Kang, K. Nishimura, R. Pestotnik, S. Nishida, I. S. Cho, M. Bischofberger, V. V. Zhulanov, Y. Unno, James E. Fast, K. Inami, Y. F. Liu, M. E. Sevior, B. G. Cheon, Y. Hoshi, W. S. Hou, X. L. Wang, K. Arinstein, N. Gabyshev, K. Hayasaka, O. Seon, Frank Simon, K. Belous, S. Korpar, Jolanta Brodzicka, M. Yamauchi, Yasuyuki Horii, J. Haba, C. H. Wang, H. K. Park, Y. Yamashita, M. J. Lee, M. Bračko, B. Golob, J. S. Lange, S. E. Vahsen, Y. Iwasaki, Y. J. Kwon, O. Schneider, M. J. Kim, M. Starič, T. Kumita, R. Louvot, V.E. Shebalin, Peter Kodys, D. Epifanov, K. S. Park, V. Bhardwaj, S. L. Olsen, S. Uno, C. Schwanda, G. B. Mohanty, and R. Mizuk

Subjects
Physics, Nuclear and High Energy Physics, Annihilation, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, Analytical chemistry, Resonance, 01 natural sciences, Nuclear physics, KEKB, Isospin, 0103 physical sciences, Pi, 010306 general physics, X(3872)
Abstract

We present results from a study of X(3872) -> pi pi J/psi decays produced via exclusive B -> KX(3872) decays. We determine the mass to be M-X(3872) = (3871.85 +/- 0.27(stat) +/- 0.19(syst)) MeV, a 90% confidence level upper limit on the natural width of Gamma(X(3872)) K+X(3872)) X B(X(3872) -> pi(+)pi(-) J/psi) = (8.63 +/- 0.82(stat) +/- 0.52(syst)) X 10(-6), and a ratio of branching fractions B(B-0 -> (KX)-X-0(3872))/B(B+ -> K+X(3872)) = 0.50 +/- 0.14(stat)) +/- 0.04(syst). The difference in mass between the X(3872) -> pi(+)pi(-) J/psi signals in B+ and B-0 decays is Delta M-X(3872) = (-0.71 +/- 0.96(stat) +/- 0.19(syst)) MeV. A search for a charged partner of the X(3872) in the decays (0) -> K-X+ or B+ -> (KX+)-X-0, X+ -> pi(+)pi(0) J/psi resulted in upper limits on the product branching fractions for these processes that are well below expectations for the case that the X(3872) is the neutral member of an isospin triplet. In addition, we examine possible J(PC) quantum number assignments for the X(3872) based on comparisons of angular correlations between final state particles in X(3872) -> pi(+)pi(-) J/psi decays with simulated data for J(PC) values of 1(++) and 2(-+). We examine the influence of rho-omega interference in the M(pi(+)pi(-)) spectrum. The analysis is based on a 711 fb(-1) data sample that contains 772 x 10(6) B (B) over bar meson pairs collected at the gamma(4S) resonance in the Belle detector at the KEKB e(+)e(-) collider.

Published
2011
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31. Observation ofX(3872)→J/ψγand Search forX(3872)→ψ′γinBDecays

Author

Andrey Sokolov, J. H. Kang, E. Nakano, Y. Sakai, Jasvinder A. Singh, T. Aushev, A. M. Bakich, Z. Natkaniec, T. Ohshima, N. J. Joshi, E. Solovieva, R. Mussa, Y. Usov, N. Gabyshev, C. L. Lim, A. Ishikawa, Marko Petrič, K. Inami, H. J. Hyun, P. Smerkol, T. Kawasaki, T. Nozaki, C. W. Park, P. Križan, B.A. Shwartz, A. Vossen, K. Trabelsi, T. A. Shibata, O. Seon, H. O. Kim, Tariq Aziz, K. Adamczyk, H. Miyata, M. Bischofberger, Y. Hoshi, D. Matvienko, R. Mizuk, Y. Miyazaki, Y. S. Sohn, Yang Li, Y. Choi, M. Shapkin, M. Uchida, V.N. Zhilich, Ping Zhou, Vladimir Zhulanov, D. M. Asner, K. Hayasaka, Jung-Hyun Kim, H. Hayashii, T. Iijima, D. Liventsev, M. Röhrken, Samo Stanič, V. Gaur, Yoshinobu Unno, M. Nakao, G. S. Varner, K. Kinoshita, T. Iwashita, K. Miyabayashi, C. C. Zhang, J. Libby, C. Kiesling, O. Nitoh, S. McOnie, M. Watanabe, M. J. Lee, S. L. Olsen, M. Bračko, H. K. Park, Y. Yamashita, G. Tatishvili, R. Pestotnik, C. Ng, H. Nakazawa, T. Sumiyoshi, C. Z. Yuan, B. Golob, V. Bhardwaj, Y. B. Hsiung, K. Sakai, S.I. Eidelman, S. Okuno, Sang Hoon Lee, J. S. Lange, B. G. Cheon, T. Sanuki, G. B. Mohanty, Y. Teramoto, Bruce Yabsley, W. S. Hou, K. M. Williams, A. Chen, Rakesh Kumar, M. Iwabuchi, L. E. Piilonen, G. Pakhlova, Anze Zupanc, Yongsun Kim, S. Uno, C. Schwanda, T. Julius, Po-Hsun Chen, K. Cho, I. Adachi, J. B. Kim, D. Epifanov, R. Louvot, B. R. Ko, V.E. Shebalin, S. K. Kim, S. Uehara, J. Haba, K. Belous, S. Korpar, Jolanta Brodzicka, J. G. Shiu, J. Dalseno, Zhenyu Zhang, K. T. Kim, S. K. Choi, Yasuyuki Horii, A.E. Bondar, Z. Doležal, Nagao Kobayashi, H. Sahoo, T. Uglov, Y. Onuki, V.M. Aulchenko, E. L. Barberio, Y. Watanabe, M. J. Kim, M. Starič, T. Kumita, Y. Iwasaki, Y. J. Kwon, O. Schneider, A.S. Kuzmin, B. Bhuyan, T. E. Browder, S. Nishida, and X. L. Wang

Subjects
Physics, Nuclear physics, KEKB, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, General Physics and Astronomy, 010306 general physics, 01 natural sciences, X(3872)
Abstract

We report a study of B→(J/ψγ)K and B→(ψ'γ)K decay modes using 772×10⁶ B B events collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We observe X(3872)→J/ψγ and report the first evidence for χ(c2)→J/ψγ in B→(X_{c cγ)K decays, while in a search for X(3872)→ψ'γ no significant signal is found. We measure the branching fractions, B(B(±)→X(3872)K(±))B(X(3872)→J/ψγ)=(1.78(-0.44)(+0.48)±0.12)×10(-6), B(B(±)→χ(c2)K(±))=(1.11(-0.34)(+0.36)±0.09)×10(-5), B(B(±)→X(3872)K(±))B(X(3872)→ψ'γ)

Published
2011
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32. Observation of Transverse Polarization Asymmetries of Charged Pion Pairs ine+e−Annihilation nears=10.58 GeV

Author

I. Adachi, M. Grosse Perdekamp, K. Inami, H. K. Park, B. G. Cheon, Y. Yamashita, A. Chen, M. Z. Wang, M. Shapkin, S. Nishida, Y. S. Sohn, S. Okuno, A. Ogawa, Y. Sakai, T. Aushev, E. Nakano, T. Iwashita, Sunmin Ryu, M. J. Kim, Marko Petrič, E. Won, Y. Teramoto, Bruce Yabsley, H. J. Hyun, P. Smerkol, M. Starič, T. Kumita, N. J. Joshi, J. G. Shiu, A. Vinokurova, V.N. Zhilich, Ping Zhou, Y. Iwasaki, A. Garmash, Y. Miyazaki, Y. Unno, H. Sahoo, C. H. Wang, K. Cho, O. Schneider, H. Kichimi, M. Leitgab, H. Park, T. Uglov, E. Solovieva, S. Uehara, M. Sumihama, O. Nitoh, B. R. Ko, W. Bartel, T. E. Browder, Yang Li, Y. Choi, Vladislav Balagura, Y. Watanabe, A. Vossen, J. Haba, A. Ishikawa, O. Seon, W. S. Hou, G. B. Mohanty, Vladimir Zhulanov, B. Golob, J. S. Lange, Yasuyuki Horii, T. Sumiyoshi, A.E. Bondar, Sang Hoon Lee, R. Seidl, R. Mizuk, M. C. Chang, M. J. Lee, M. Bračko, M. Iwabuchi, L. E. Piilonen, G. Pakhlova, H. O. Kim, Samo Stanič, Po-Hsun Chen, M. Uchida, D. Liventsev, T. Ohshima, G. S. Varner, N. Gabyshev, H. Aihara, C. Liu, P. Wang, V. Gaur, S. McOnie, R. Louvot, V.E. Shebalin, S. Uno, C. Schwanda, T. A. Shibata, H. Miyata, M. Bischofberger, Y. Hoshi, S.I. Eidelman, K. Hayasaka, and M. Feindt

Subjects
Physics, Quark, Particle physics, Annihilation, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, Polarization (waves), 7. Clean energy, 01 natural sciences, Baryon, Nuclear physics, Pion, KEKB, Fragmentation (mass spectrometry), 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract

The interference fragmentation function translates the fragmentation of a quark with a transverse projection of the spin into an azimuthal asymmetry of two final-state hadrons. In e(+)e(-) annihilation the product of two interference fragmentation functions is measured. We report nonzero asymmetries for pairs of charge-ordered π(+)π(-) pairs, which indicate a significant interference fragmentation function in this channel. The results are obtained from a 672 fb(-1) data sample that contains 711 × 10(6) π(+)π(-) pairs and was collected at and near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.

Published
2011
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33. Evidence for the Suppressed DecayB−→DK−,D→K+π−

Author

S. H. Lee, Y. Sakai, Y. Teramoto, H. Farhat, K. Negishi, E. Solovieva, B. Golob, Leo Piilonen, Hiroaki Aihara, M. Bračko, Norihito Muramatsu, Toru Iijima, A. Zupanc, I. Adachi, S. E. Vahsen, Andrey Sokolov, I. Jaegle, I. S. Cho, O. Seon, Frank Simon, Kevin Varvell, D. M. Asner, A. M. Bakich, E. Nedelkovska, S. Ganguly, O. Nitoh, V. Zhilich, G. Bonvicini, D. H. Kah, G. Tatishvili, Y. Watanabe, T. Mori, D. Dutta, T. Sanuki, D. Cinabro, G. Schnell, A. J. Schwartz, A. Bala, M. Steder, James E. Fast, J. Li, K. Cho, M. Uchida, H. J. Kim, Y. Choi, Z. Doležal, J. Haba, J. Dalseno, V. Gaur, P. Lukin, M. Shapkin, G. Pakhlova, P. Chang, Semen Eidelman, D. Y. Kim, S. Uno, Pavel Krokovny, T. K. Pedlar, A. Moll, J. B. Kim, M. C. Chang, T. Kuhr, Phillip Urquijo, M. Ritter, T. A. Shibata, S. Esen, O. Schneider, V. Chobanova, S. Okuno, B.A. Shwartz, H. Sahoo, Y. S. Sohn, R. Gillard, M. Starič, V. Chekelian, D. Liventsev, T. Saito, T. Uglov, P. Vanhoefer, Marko Petrič, K. Trabelsi, H. J. Hyun, Vladimir Zhulanov, C. P. Shen, A.S. Kuzmin, J. G. Shiu, J. Libby, M. E. Sevior, Peter Kodys, B. G. Cheon, A.L. Sibidanov, P. Krishnan, Y. J. Kwon, S. Ogawa, Samo Korpar, H. Miyake, C. Van Hulse, G. Varner, Yasuyuki Horii, Y. Hoshi, M. Nayak, R. Mussa, S. Yashchenko, Tagir Aushev, Y. Onuki, M. N. Wagner, T. Julius, E. Won, M. J. Kim, A. Ishikawa, Y. Yamashita, Torben Ferber, M. Nakao, Yongsun Kim, C. W. Park, Yueh-Feng Liu, C. Schwanda, K. Belous, P. Križan, R. Chistov, T. Kumita, A. Bozek, T. Iwashita, T. E. Browder, Prafulla Kumar Behera, S. Sandilya, N. Gabyshev, D. Červenkov, G. B. Mohanty, R. Mizuk, Y. Yusa, W. S. Hou, E. Kato, Z. Drásal, A. Rostomyan, V. Bhardwaj, P. Pakhlov, Yang Li, B. R. Ko, H. Park, N. K. Nisar, L. Santelj, Y. M. Goh, H. Hayashii, J. Klucar, V. Savinov, C. H. Wang, M. Z. Wang, K. Kinoshita, U. Tamponi, Z. Suzuki, K. M. Williams, A. Chen, Y. Unno, Mikhail Danilov, M. Röhrken, L. Li Gioi, C. Ng, K. Senyo, and Yasushi Nagasaka

Subjects
Physics, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, Analytical chemistry, General Physics and Astronomy, Resonance, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, Pi, CP violation, 010306 general physics, Bar (unit)
Abstract

The suppressed decay chain B- -> DK-, D -> K+pi(-), where D indicates a (D) over bar (0) or D-0 state, provides important information on the CP-violating angle phi(3). We measure the ratio R-DK of the decay rates to the favored mode B- -> DK-, D -> K+pi(-) to be R-DK = [1.63(-0.41)(+0.44)(stat)(-0.13)(+0.07)(syst)] x 10(-2), which indicates the first evidence of the signal with a significance of 4.1 sigma. We also measure the asymmetry A(DK) between the charge-conjugate decays to be A(DK) = -0.39(-0.28)(+0.26)(stat)(-0.03)(+0.04)(syst). The results are based on the full 772 x 10(6) B (B) over bar pair data sample collected at the Gamma(4S) resonance with the Belle detector.

Published
2011
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34. Publisher’s Note: Study of the decaysB→Ds1(2536)+D¯(*)[Phys. Rev. D83, 051102(R) (2011)]

Author

S. Nishida, K. Vervink, A. Zupanc, A.E. Bondar, A. M. Bakich, T. Ohshima, O. Nitoh, N. Gabyshev, H. K. Park, Y. Yamashita, S. H. Kyeong, Anton Poluektov, A. Vinokurova, A. Garmash, Sunmin Ryu, M. E. Sevior, S. Eidelman, I. Tikhomirov, K. M. Williams, A. Chen, P. Pakhlov, Z. Natkaniec, K. Trabelsi, W. Ostrowicz, Y. S. Sohn, V.N. Zhilich, Ping Zhou, Meng Wang, I. S. Cho, M. Uchida, C. P. Shen, H. O. Kim, K. Cho, H. Ha, T. Iijima, C. H. Wang, M. Shapkin, D. Liventsev, Y. Teramoto, Bruce Yabsley, A. Bozek, H. Hayashii, Hyunyong Kim, M. J. Kim, M. Röhrken, Y. J. Kim, O. Zyukova, T. Aushev, G. S. Varner, A. Drutskoy, S. Neubauer, Samo Stanič, K. Miyabayashi, W. S. Hou, I. Adachi, Y. Yusa, D. Epifanov, M. Starič, T. Kuhr, J. B. Singh, K. Arinstein, R. Itoh, T. E. Browder, Y. Sakai, P. Wang, B. G. Cheon, T. Kumita, S. H. Lee, V. Bhardwaj, K. Kinoshita, S. E. Vahsen, M. Iwabuchi, K. Prothmann, Vladislav Balagura, R. Pestotnik, S. L. Olsen, A. Kuzmin, Marko Petrič, H. J. Hyun, P. Smerkol, Byeong Rok Ko, M. Danilov, S. Uno, C. Schwanda, H. Nakazawa, Jung-Hyun Kim, M. Bračko, K. S. Choi, T. Iwashita, Y. Iwasaki, Y. J. Kwon, S. Ogawa, E. Solovieva, J. Li, Y. Miyazaki, Y. Choi, O. Schneider, J. G. Shiu, K. Senyo, B. Golob, T. Kawasaki, R. Louvot, V.E. Shebalin, A. Vossen, K. Inami, J. S. Lange, O. Seon, Frank Simon, P. Krizan, H. Sahoo, T. Uglov, A. Ishikawa, K. Sakai, Y. Watanabe, Andrey Sokolov, J. H. Kang, V. V. Zhulanov, H. Miyata, M. Bischofberger, Y. Hoshi, K. Hayasaka, Yasuyuki Horii, M. C. Chang, L. E. Piilonen, G. Pakhlova, B. Shwartz, T. Julius, Po-Hsun Chen, R. Chistov, T. Sumiyoshi, Jeremy Dalseno, M. Sumihama, R. Mizuk, V. M. Aulchenko, C. Liu, Peter Kodys, V. Gaur, G. B. Mohanty, Satoshi Tanaka, M. Nakao, S. McOnie, A. Matyja, Y. Usov, Y. F. Liu, and Z. P. Zhang

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, KEKB, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, 010306 general physics, 01 natural sciences, 3. Good health
Abstract

We report a study of the decays B -> D_s1(2536)+ anti-D(*), where anti-D(*) is anti-D0, D- or D*-, using a sample of 657 x 10^6 B anti-B pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The branching fractions of the decays B+ -> D_s1(2536)+ anti-D0, B0 -> D_s1(2536)+ D- and B0 -> D_s1(2536)+ D*- multiplied by that of D_s1(2536)+ -> (D*0K+ + D*+K0) are found to be (3.97+-0.85+-0.56) x 10^-4, (2.75+-0.62+-0.36) x 10^-4 and (5.01+-1.21+-0.70) x 10^-4, respectively.

Published
2011
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35. Measurement of inclusive pi(0) production in the charged-current interactions of neutrinos in a 1.3-GeV wide band beam

Author

Tadayuki Takahashi, C. Yanagisawa, A. Rodriguez, S. Likhoded, Y. Kuno, J. Argyriades, H. Yokoyama, F. Pierre, A. Cervera, Atsumu Suzuki, Minoru Yoshida, S. Nawang, O. V. Mineev, Y. Totsuka, J. Catala, A. K. Ichikawa, Toshio Namba, Y. Takubo, Y. Takeuchi, Ko Okumura, K. O. Cho, Yuichi Oyama, H. I. Jang, A. Konaka, C. McGrew, H. W. Sobel, Shigeki Aoki, R. Schroeter, Mark R. Vagins, G. Sitjes, E. Kearns, R. Nambu, T. Nakadaira, K. Taki, P. Novella, Makoto Sakuda, Y. Hayato, Masataka Iinuma, K. K. Joo, J. Yoo, L. Whitehead, M. Ishitsuka, J. Alcaraz, F. Nova, T. Kutter, J.J. Gómez-Cadenas, M. Sekiguchi, Masato Shiozawa, K. Nishikawa, Y. Takenaga, R. Ashie, Masaaki Tanaka, M. Miura, K. Nitta, C. W. Walter, K. Kaneyuki, Katsuki Hiraide, U. Dore, N. Tamura, Silvia Borghi, E. J. Jeon, C. Saji, J. Kameda, J. L. Stone, H. Maesaka, G. Jover Mañas, L. Ludovici, Lawrence Sulak, Itsuo Nakano, C. Cavata, A. N. Khotjantsev, Y. Fujii, Y. Kurimoto, M. Sorel, Jordi Burguet-Castell, J. H. Choi, Y. Fukuda, M. M. Khabibullin, Stephane T'Jampens, R. L. Helmer, Masashi Yokoyama, T. Ishii, J. Zalipska, K. Nakamura, Yasunari Suzuki, K. Asakura, S. Andringa, T. Hara, E. Fernandez, P. Kitching, S. M. Oser, Yusuke Koshio, W. Wang, X. Espinal, Y. Moriguchi, Masayuki Nakahata, T. Ishida, Shaomin Chen, Tsuyoshi Nakaya, A. Minamino, R. J. Wilkes, Y. Yamada, I. T. Lim, R. Terri, S. B. Kim, Shigetaka Moriyama, J. Y. Kim, A. Tornero-Lopez, C. Mariani, R. Gran, H. C. Bhang, J. G. Learned, J. Bouchez, I. S. Jeong, M. Y. Pac, A. Okada, Shoei Nakayama, H. G. Berns, J. Mallet, T. Kobayashi, M. Hasegawa, Katsuhiro Kobayashi, F. Berghaus, S. Matsuno, Yu. Kudenko, K. Ishihara, Y. Aoyama, Shimpei Yamamoto, S. Mine, C. O. Kim, M. Fechner, K. B. McConnel Mahn, Michael B. Smy, Takaaki Kajita, Federico Sanchez, Kate Scholberg, Takehisa Hasegawa, N. Yershov, P. F. Loverre, W. R. Kropp, V. A. Matveev, S. Yamada, T. Iwashita, C. K. Jung, D. Kielczewska, I. Kato, Y. Obayashi, M. Tada, David William Casper, C. Mitsuda, J. Hosaka, K. K. Shiraishi, Yoshitaka Itow, S P Mikheyev, A. Blondel, and A. Ikeda

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Física, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Pion, Gargamelle, 0103 physical sciences, Muon neutrino, High Energy Physics::Experiment, Neutrino, 010306 general physics, Charged current, Lepton
Abstract

In this paper we report on the measurement of the rate of inclusive $\pi^0$ production induced by charged-current neutrino interactions in a C$_8$H$_8$ target at a mean energy of 1.3 GeV in the K2K near detector. Out of a sample of 11,606 charged current neutrino interactions, we select 479 $\pi^0$ events with two reconstructed photons. We find that the cross section for the inclusive $\pi^0$ production relative to the charged-current quasi-elastic cross section is $$\frac{\sigma_{CC\pi^0}}{\sigma_{CCQE}}=0.426\pm0.032(stat.)\pm0.035(syst.)$$ The energy dependent cross section ratio is also measured. The results are consistent with previous experiments for exclusive channels on different targets., Comment: 18 pages, 11 figures, submitted to PRD

Published
2011

36. Solar neutrino measurements in Super-Kamiokande-II

Author

D. Kielczewska, Y. Watanabe, I. Kato, M. Sugihara, K. S. Ganezer, K. Ueshima, Y. Totsuka, H. Okazawa, Y. Takeuchi, W. Wang, T. Koike, Michael B. Smy, H. Seo, Shinya Yamada, Masatoshi Koshiba, R. Terri, T. Ishizuka, T. Sato, J. L. Raaf, R. W. Ellsworth, M. Ishitsuka, Atsushi Takeda, Toshiyuki Tanaka, Atsumu Suzuki, Alec Habig, N. Tanimoto, Mark R. Vagins, R. A. Wendell, Shantanu Desai, S. Matsuno, E. Kearns, H. Maesaka, Yueh-Feng Liu, Katsuki Hiraide, J. Dunmore, David William Casper, T. Kato, C. Mitsuda, K. Nitta, Shaomin Chen, Kyoshi Nishijima, Hiroshi Sato, Hirokazu Ishino, C. Saji, Shigetaka Moriyama, T. Iida, H. Nishino, Takaaki Kajita, Y. Gando, J. S. Jang, A. K. Ichikawa, Haruki Watanabe, A. L. Stachyra, W. R. Kropp, K. Nishikawa, K. K. Shiraishi, K. Nakamura, G. Guillian, G. Mitsuka, T. Nakadaira, C. Ishihara, M. Goldhaber, T. Iwashita, Makoto Sakuda, Shoei Nakayama, I. Higuchi, H. Ishii, Frédéric Dufour, Masayuki Nakahata, Y. Idehara, Shigeki Tasaka, K. Kaneyuki, N. Tamura, S. Dazeley, J. P. Cravens, J. L. Stone, C. W. Walter, T. J. Haines, M. Ikeda, H. W. Sobel, J. Y. Kim, Yasunari Suzuki, Michael Litos, Magdalena Malek, Lawrence Sulak, C. McGrew, S. Clark, Y. Hayato, S. Likhoded, S. Mine, Y. Kuno, Shoji Yamamoto, Masashi Yokoyama, A. Minamino, R. Svoboda, E. Thrane, Y. Obayashi, Yusuke Koshio, M. Fechner, D. W. Liu, Hiroyuki Sekiya, Soo-Bong Kim, Y. Fukuda, Kate Scholberg, Tsuyoshi Nakaya, J. Yoo, Ko Okumura, Masato Shiozawa, Y. Choi, Hiroshi Ogawa, Kunio Inoue, Takehisa Hasegawa, T. Kobayashi, D. Turcan, K. Ishihara, Yuichi Oyama, K. Abe, T. Ishii, R. J. Wilkes, I. T. Lim, C. Yanagisawa, B. S. Yang, T. Ishida, Y. Furuse, M. D. Messier, H. G. Berns, Takanori Sasaki, John G. Learned, A. Sarrat, G. W. Sullivan, Yoshitaka Itow, John Hill, Katsuhiro Kobayashi, W. E. Keig, J. Kameda, Minoru Yoshida, Zhi Deng, Y. Takenaga, Masaya Hasegawa, M. Miura, K. Washburn, S. Hatakeyama, R. Gran, C. Regis, and C. K. Jung

Subjects
Physics, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, Phase (waves), Solar cycle 23, Flux, Astrophysics, Spectral line, Solar cycle, High Energy Physics - Experiment, Nuclear physics, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino oscillation, Super-Kamiokande
Abstract

The results of the second phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first phase. The solar neutrino flux spectrum and time variation as well as oscillation results are statistically consistent with the first phase and do not show spectral distortion. The time-dependent flux measurement of the combined first and second phases coincides with the full period of solar cycle 23 and shows no correlation with solar activity. The measured {sup 8}B total flux is (2.38{+-}0.05(stat.){sub -0.15}{sup +0.16}(sys.))x10{sup 6} cm{sup -2} s{sup -1} and the day-night difference is found to be (-6.3{+-}4.2(stat.){+-}3.7(sys.))%. There is no evidence of systematic tendencies between the first and second phases.

Published
2008

37. Experimental study of the atmospheric neutrino backgrounds forp→e+π0searches in water Cherenkov detectors

Author

T. Ishii, J. H. Choi, C. W. Walter, K. McConnel, X. Espinal, Y. Moriguchi, R. J. Wilkes, I. T. Lim, J. Argyriades, Mark R. Vagins, Jordi Burguet-Castell, M. M. Khabibullin, Stephane T'Jampens, C. Yanagisawa, G. Jover, W. Wang, K. Nitta, A. Konaka, K. Kaneyuki, R. Ashie, Masashi Yokoyama, H. Yokoyama, F. Pierre, A. Cervera, Yu. Kudenko, Y. Fukuda, L. Ludovici, C. K. Jung, Yuichi Oyama, C. Cavata, Atsumu Suzuki, S. Mine, M. Sorel, T. Nakadaira, Y. Takubo, Y. Takeuchi, Tsuyoshi Nakaya, Takaaki Kajita, Y. Yamada, D. Kielczewska, E. Kearns, Masataka Iinuma, J. Yoo, Yasunari Suzuki, M. Ishitsuka, E. Fernandez, Masato Shiozawa, R. Gran, C. Saji, Makoto Sakuda, R. Schroeter, I. Kato, K. Taki, Toshio Namba, Takehisa Hasegawa, Michael B. Smy, J. Mallet, S. Matsuno, T. Kutter, M. Fechner, T. Hara, Masaaki Tanaka, C. McGrew, J. Kameda, Minoru Yoshida, A. Blondel, S. Nawang, O. V. Mineev, Y. Hayato, A. Ikeda, S. M. Oser, N. Tamura, Federico Sanchez, K. O. Cho, Tadayuki Takahashi, Y. Obayashi, G. Sitjes, Silvia Borghi, Shoji Yamamoto, P. Novella, A. Okada, J. L. Stone, A. Rodriguez, J.J. Gómez-Cadenas, Y. Takenaga, S. Likhoded, Masaya Hasegawa, M. Miura, Y. Kuno, R. Nambu, M. Sekiguchi, N. Yershov, A. N. Khotjantsev, Y. Fujii, H. G. Berns, M. Tada, David William Casper, Yoshitaka Itow, Yusuke Koshio, C. Mitsuda, C. O. Kim, J. Hosaka, W. R. Kropp, A. Tornero-Lopez, Kate Scholberg, J. G. Learned, S P Mikheyev, S. Yamada, T. Iwashita, K. Nakamura, K. K. Shiraishi, P. F. Loverre, Katsuhiro Kobayashi, I. S. Jeong, S. B. Kim, L. R. Sulak, J. Y. Kim, Masayuki Nakahata, A. K. Ichikawa, V. A. Matveev, L. Whitehead, T. Kobayashi, Katsuki Hiraide, T. Ishida, H. W. Sobel, K. Ishihara, E. J. Jeon, Shaomin Chen, Shigetaka Moriyama, Shoei Nakayama, S. Andringa, J. Catala, J. Alcaraz, F. Nova, K. K. Joo, H. C. Bhang, J. Bouchez, M. Y. Pac, C. Mariani, K. Nishikawa, U. Dore, Itsuo Nakano, Y. Kurimoto, R. L. Helmer, A. Minamino, J. Zalipska, R. Terri, Ko Okumura, Shigeki Aoki, Y. Totsuka, H. I. Jang, H. Maesaka, K. Asakura, P. Kitching, and F. Berghaus

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Cherenkov detector, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, Solar neutrino problem, 01 natural sciences, 7. Clean energy, law.invention, Nuclear physics, Neutrino detector, 13. Climate action, law, 0103 physical sciences, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Super-Kamiokande
Abstract

The atmospheric neutrino background for proton decay via p→e + π 0 in ring imaging water Cherenkov detectors is studied with an artificial accelerator neutrino beam for the first time. In total, 3.14 × 10 5 neutrino events corresponding to about 10 megaton-years of atmospheric neutrino interactions were collected by a 1000 ton water Cherenkov detector (KT). The KT charged-current single π 0 production data are well reproduced by simulation programs of neutrino and secondary hadronic interactions used in the Super-Kamiokande (SK) proton decay search. The obtained p→ e + π 0 background rate by the KT data for SK from the atmospheric neutrinos whose energies are below 3 GeV is 1.63 +0.42 -0.33 (stat) +0.45 -0.51 (syst)(megaton-year) -1 . This result is also relevant to possible future, megaton-scale water Cherenkov detectors.

Published
2008
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38. Experimental Demonstration of the Induction Synchrotron

Author

Tanuja Dixit, Kazunori Otsuka, E. Nakamura, Yoshito Shimosaki, Yoshio Arakida, Ken Takayama, T. Iwashita, Masayoshi Wake, Kota Torikai, and T. Kono

Subjects
Physics, Large Hadron Collider, Proton, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, Proton Synchrotron, Particle accelerator, Synchrotron, law.invention, Nuclear physics, Acceleration, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Neutrino Factory, KEK digital accelerator, Nuclear Experiment
Abstract

We report an experimental demonstration of the induction synchrotron, the concept of which has been proposed as a future accelerator for the second generation of neutrino factory or hadron collider. The induction synchrotron supports a superbunch and a superbunch permits more charge to be accelerated while observing the constraints of the transverse space-charge limit. By using a newly developed induction acceleration system instead of radio-wave acceleration devices, a single proton bunch injected from the 500 MeV booster ring and captured by the barrier bucket created by the induction step voltages was accelerated to 6 GeV in the KEK proton synchrotron.

Published
2007
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39. Status of the induction acceleration system

Author

Y. Shimosaki, Y. Arakida, T. Iwashita, T. Kono, E. Nakamura, K. Takayama, M. Wake, T. S. Dixit, K. Torikai, N. Nagura, K. Okazaki, and K. Otsuka

Subjects
Physics, Nuclear physics, Acceleration, Proton, Physics::Accelerator Physics, Proton Synchrotron, Nuclear Experiment, Voltage
Abstract

A single proton bunch confined by the barrier voltage was accelerated by the induction step-voltage from 500MeV to 6GeV at the KEK 12-GeV proton synchrotron in March 2006. Various technical issues in the induction acceleration system, which have been faced in actual operation, are summarized.

Published
2007
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40. A modification plan of the KEK 500MEV booster to an all-ion accelerators (An injector-free synchrotron)

Author

Toshikazu Adachi, T. Iwashita, Tanuja Dixit, K. Okazaki, Takashi Kikuchi, Yoshio Arakida, Shigeru Inagaki, Kota Torikai, T. Kono, Masayoshi Wake, M. Kawai, Ken Takayama, E. Nakamura, Hikaru Sato, and Yoshito Shimosaki

Subjects
Nuclear physics, Physics, Ion beam, Switched-mode power supply, law, Booster (electric power), Physics::Accelerator Physics, Strong focusing, Injector, Synchrotron, Ion source, law.invention, Ion
Abstract

A medium-energy synchrotron capable of accelerating all ion species based on a novel technology of the induction synchrotron has been proposed as an all-ion accelerator (AIA). The AIA without any specific injector employs a strong focusing lattice for ion-beam guiding and induction acceleration cells for acceleration and longitudinal capture, which are driven by a novel switching power supply. All ions, including cluster ions in their possible and arbitrary charge state, are accelerated in a single accelerator. A plan to modify the existing KEK 500 MeV Booster synchrotron to the AIA is under consideration. Important aspects in a 200 kV ion source, and specific features in the orbit correction associated with the low-field injection and induction acceleration, are described.

Published
2007
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41. Acceleration scheme of the AIA and its control system

Author

Yoshio Arakida, Yoshito Shimosaki, T. Kono, Tanuja Dixit, K. Okazaki, T. Iwashita, and Ken Takayama

Subjects
Nuclear physics, Physics, Ion accelerators, law, Booster (electric power), Control system, Induction generator, Radio frequency, Atomic physics, Synchrotron, law.invention, Voltage
Abstract

Acceleration scheme of All Ion Accelerator (AIA), one of the active applications of Induction Synchrotron (IS) is proposed with its beam simulation analysis. The KEK 500 MeV booster is going to be modified to KEK-AIA. Trigger system of the accelerator is described. A new type of acceleration cell for KEK-AIA is described.

Published
2007
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42. Search for Neutral Q-balls in Super-Kamiokande II

Author

E. Guillian, S. Nakayama, John G. Learned, R. A. Wendell, David William Casper, Song Chen, H. Ogawa, K. S. Ganezer, J. P. Cravens, C. Yanagisawa, G. W. Sullivan, A. K. Ichikawa, J. Kameda, S. Hatakeyama, S. B. Kim, J. Y. Kim, Y. Totsuka, C. Regis, K. Ueshima, B. S. Yang, Y. Fukuda, T. Iida, C. K. Jung, J. L. Raaf, Steven Dazeley, K. K. Shiraishi, D. Kielczewska, N. Tanimoto, A. T. Suzuki, T. Ishida, W. Wang, C. Ishihara, M. D. Messier, Y. Takeuchi, H. Maesaka, Takuya Sasaki, H. Ishii, T. Kajita, Y. Gando, T. Nakadaira, Hiroshi Sato, H. Seo, N. Tamura, Makoto Sakuda, Y. Obayashi, Lawrence Sulak, Zhi Deng, J. L. Stone, Ken-ichiro Kobayashi, H. Nishino, Y. Takenaga, K. Nishijima, S. Likhoded, Hiroshi Watanabe, M. Miura, K. Ishihara, C. McGrew, S. Clark, Y. Kuno, Masaki Ishitsuka, H. G. Berns, R. Terri, Makoto Hasegawa, K. Washburn, Y. Hayato, Yueh-Feng Liu, J. S. Jang, E. Kearns, M. Goldhaber, Yusuke Koshio, T. Kato, R. Gran, T. Sato, M. B. Smy, Shoji Yamamoto, W. E. Keig, W. R. Kropp, F. Dufour, R. W. Ellsworth, Y. Itow, Shigeki Tasaka, Masashi Yokoyama, R. Svoboda, K. Kaneyuki, C. Saji, S. Yamada, T. Iwashita, A. Sarrat, Yasunari Suzuki, M. R. Vagins, Atsushi Takeda, T. Ishii, T. Kobayashi, H. Okazawa, T. Ishizuka, C. Mitsuda, Shantanu Desai, J. Griskevich, Tsuyoshi Nakaya, Alec Habig, M. Sugihara, S. Matsuno, R. J. Wilkes, Masato Shiozawa, Y. Choi, Y. Watanabe, G. Mitsuka, I. T. Lim, T. J. Haines, Michael Litos, Eric Thrane, M. Koshiba, Yuichi Oyama, Ko Okumura, Michitoshi Yoshida, Ke. Abe, Kunio Inoue, K. Nishikawa, A. Minamino, D. W. Liu, I. Higuchi, K. Nitta, K. Nakamura, S. Moriyama, Masayuki Nakahata, A. Herfurth, J. Dunmore, J. Hill, T. Koike, H. W. Sobel, Kate Scholberg, Hirokazu Ishino, S. Mine, Takehisa Hasegawa, and C. W. Walter

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Pion, Detector, Dark matter, Flux, High Energy Physics::Experiment, Super-Kamiokande, Event (particle physics), High Energy Physics - Experiment
Abstract

A search for Q-balls induced groups of successive contained events has been carried out in Super-Kamiokande II with 541.7 days of live time. Neutral Q-balls would emit pions when colliding with nuclei, generating a signal of successive contained pion events along a track. No candidate for successive contained event groups has been found in Super-Kamiokande II, so upper limits on the possible flux of such Q-balls have been obtained., Comment: 5 pages, 5 figures, Submitted to Phys. Lett. B

Published
2006

43. A Measurement of Atmospheric Neutrino Flux Consistent with Tau Neutrino Appearance

Author

K. Kaneyuki, W. R. Kropp, R. J. Wilkes, Y. Takeuchi, Yasunari Suzuki, G. Mitsuka, I. T. Lim, T. Iwashita, Takaaki Kajita, I. Higuchi, Henry W. Sobel, K. Nitta, T. Nakadaira, Kyoshi Nishijima, A. K. Ichikawa, Michael Litos, Frédéric Dufour, M. Ishitsuka, S. B. Kim, J. Y. Kim, Atsushi Takeda, J. Kameda, Makoto Sakuda, A. Minamino, Shigetaka Moriyama, H. Ishii, Atsumu Suzuki, Shantanu Desai, Minoru Yoshida, K. Nakamura, N. Tamura, C. Regis, M. Sugihara, Y. Totsuka, C. K. Jung, Shoei Nakayama, Yuichi Oyama, J. L. Stone, D. Kielczewska, E. Kearns, T. Ishii, D. W. Liu, M. Malek, Y. Gando, C. McGrew, S. Clark, J. P. Cravens, K. Ishihara, J. Hill, K. S. Ganezer, Yusuke Koshio, I. Kato, Masayuki Nakahata, Y. Watanabe, C. Yanagisawa, H. Okazawa, Y. Takenaga, Mark R. Vagins, Masaya Hasegawa, M. Miura, C. W. Walter, J. S. Jang, K. Abe, L. R. Sulak, C. Saji, J. Zalipska, K. Nishikawa, T. Iida, Y. Obayashi, K. Ueshima, T. Sato, J. Yoo, E. Guillian, T. Ishida, Masato Shiozawa, Y. Choi, M. Goldhaber, David William Casper, R. A. Wendell, C. Mitsuda, H. Ogawa, S. Mine, W. Wang, J. G. Learned, Todd Haines, T. Koike, Kate Scholberg, Yoshitaka Itow, G. W. Sullivan, M. D. Messier, T. Kobayashi, K. K. Shiraishi, Y. Fukuda, C. Ishihara, K. Washburn, Katsuhiro Kobayashi, T. Ishizuka, Masashi Yokoyama, R. Svoboda, S. Hatakeyama, R. Gran, J. L. Raaf, Ko Okumura, H. G. Berns, R. W. Ellsworth, Tsuyoshi Nakaya, Takehisa Hasegawa, Hirokazu Ishino, R. Terri, Masatoshi Koshiba, Kunio Inoue, S. Likhoded, Y. Kuno, Takanori Sasaki, T. Kato, A. Sarrat, Michael B. Smy, H. Seo, W. E. Keig, N. Tanimoto, H. Maesaka, Hiroshi Sato, H. Nishino, Shigeki Tasaka, S. Dazeley, Y. Hayato, Alec Habig, S. Matsuno, and Shoji Yamamoto

Subjects
Physics, Quantum chromodynamics, Particle physics, Tamura, Norio, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, General Physics and Astronomy, Flux, High Energy Physics - Experiment, Nuclear physics, Angular distribution, Tau neutrino, 田村, 詔生, High Energy Physics::Experiment, Atmospheric neutrino, Neutrino, Neutrino oscillation, Charged current
Abstract

A search for the appearance of tau neutrinos from \mutau oscillations in the atmospheric neutrinos has been performed using 1489.2 days of atmospheric neutrino data from the Super-Kamiokande-I experiment. A best fit tau neutrino appearance signal of 138 $\pm$ 48 (stat.) $^{+15}_{-32}$ (sys.) events is obtained with an expectation of 78 $\pm$ 26 (sys.). The hypothesis of no tau neutrino appearance is disfavored by 2.4 sigma., Comment: 5 pages, 3 figures, 3 tables, submitted to PRL

Published
2006

44. Measurement of atmospheric neutrino oscillation parameters by Super-Kamiokande I

Author

G. Guillian, C. Yanagisawa, M. Goldhaber, A. K. Ichikawa, K. Kaneyuki, A. Minamino, Y. Watanabe, S. Mine, D. W. Liu, Atsumu Suzuki, S. Matsuno, E. Kearns, T. Toshito, Hirokazu Ishino, M. Ishitsuka, Y. Totsuka, A. Suzuki, C. W. Walter, Ko Okumura, R. Svoboda, D. Turcan, Shantanu Desai, Y. Nakajima, K. Ishihara, J. P. Cravens, Y. Ashie, C. McGrew, S. Clark, R. J. Wilkes, Tsuyoshi Nakaya, Kunio Inoue, Y. Hayato, K. Taki, T. Sasaki, C. Saji, J. Yoo, A. L. Stachyra, K. Nishikawa, I. T. Lim, Masato Shiozawa, A. Kibayashi, K. S. Ganezer, J. Kameda, Shoji Yamamoto, T. Kato, N. Tamura, L. R. Sulak, C. W. Sterner, E. Blaufuss, J. Shirai, Y. Fukuda, Magdalena Malek, J. L. Stone, E. Sharkey, S. Dazeley, Yoshitaka Itow, Takashi Kobayashi, K. Hayashi, Y. Gando, Yusuke Koshio, Koji Nakamura, Y. Takeuchi, K. Washburn, Mark R. Vagins, John G. Learned, T. Iwashita, H. Okazawa, S. Ueda, T. Maruyama, S. Likhoded, Shinya Yamada, R. Nambu, W. Wang, S. Hatakeyama, Y. Kuno, R. Gran, Kazumasa Miyano, Henry W. Sobel, K. Nitta, Michael B. Smy, H. Seo, Takehisa Hasegawa, Kyoshi Nishijima, J. A. Goodman, Alec Habig, W. R. Kropp, G. W. Sullivan, John Hill, C. K. Jung, D. Kielczewska, Shigetaka Moriyama, J. S. Jang, D. Takemori, Yuichi Oyama, I. Kato, Shoei Nakayama, Katsuhiro Kobayashi, Minoru Yoshida, Y. Obayashi, T. Harada, S. Tasaka, W. E. Keig, T. Ishii, W. Gajewski, Kate Scholberg, S. B. Kim, David William Casper, Masayuki Nakahata, C. Mitsuda, J. Hosaka, Y. Takenaga, Masaya Hasegawa, M. Miura, K. K. Shiraishi, Yoshihiro Suzuki, Masatoshi Koshiba, J. Ishii, J. Zalipska, T. Ishida, Makoto Sakuda, A. Sarrat, Todd Haines, M. D. Messier, C. Mauger, A. Okada, H. G. Berns, T. Ishizuka, Taichi Morita, R. W. Ellsworth, Takaaki Kajita, Y. Choi, J. Y. Kim, Toshio Namba, and H. Maesaka

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, High Energy Physics::Phenomenology, Monte Carlo method, High Energy Physics - Experiment, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Neutrino, Neutrino oscillation, Super-Kamiokande, Charged current, Energy (signal processing)
Abstract

We present a combined analysis of fully-contained, partially-contained and upward-going muon atmospheric neutrino data from a 1489 day exposure of the Super--Kamiokande detector. The data samples span roughly five decades in neutrino energy, from 100 MeV to 10 TeV. A detailed Monte Carlo comparison is described and presented. The data is fit to the Monte Carlo expectation, and is found to be consistent with neutrino oscillations of $\nu_\mu \leftrightarrow \nu_\tau$ with $\sin^22\theta > 0.92$ and $1.5\times 10^{-3} < \Delta m^2 < 3.4\times 10^{-3}{\rm eV}^2$ at 90% confidence level., Comment: 32 pages, 44 figures. As accepted for publication in Physical Review D

Published
2005
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45. First observation of the acceleration of a single bunch by using the induction device in the KEK Proton Synchrotron

Author

Atsushi Kawasaki, Isao Yamane, E. Nakamura, Masayoshi Wake, Ken Takayama, Makoto Sakuda, Hikaru Sato, Takeshi Toyama, T. Iwashita, Kunio Koseki, Masao Watanabe, Susumu Igarashi, Masashi Shirakata, M. Shiho, T. Sueno, Yoshito Shimosaki, Yoshio Arakida, Tadaaki Kouno, Akira Tokuchi, Kota Torikai, Kazuhiko Horioka, and Jun Ichi Kishiro

Subjects
Physics, Accelerator Physics (physics.acc-ph), Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, General Physics and Astronomy, Proton Synchrotron, FOS: Physical sciences, Nuclear physics, Acceleration, Physics::Accelerator Physics, High Energy Physics::Experiment, Physics - Accelerator Physics, Nuclear Experiment, Energy (signal processing)
Abstract

A single RF bunch in the KEK proton synchrotron was accelerated with an induction acceleration method from the injection energy of 500 MeV to 5 GeV., 6figures

Published
2004

46. Publisher's Note: Search for dark matter WIMPs using upward through-going muons in Super-Kamiokande [Phys. Rev. D70, 083523 (2004)]

Author

S. Desai, Y. Ashie, S. Fukuda, Y. Fukuda, K. Ishihara, Y. Itow, Y. Koshio, A. Minamino, M. Miura, S. Moriyama, M. Nakahata, T. Namba, R. Nambu, Y. Obayashi, N. Sakurai, M. Shiozawa, Y. Suzuki, H. Takeuchi, Y. Takeuchi, S. Yamada, M. Ishitsuka, T. Kajita, K. Kaneyuki, S. Nakayama, A. Okada, T. Ooyabu, C. Saji, M. Earl, E. Kearns, J. L. Stone, L. R. Sulak, C. W. Walter, W. Wang, M. Goldhaber, T. Barszczak, D. Casper, J. P. Cravens, W. Gajewski, W. R. Kropp, S. Mine, D. W. Liu, M. B. Smy, H. W. Sobel, C. W. Sterner, M. R. Vagins, K. S. Ganezer, J. Hill, W. E. Keig, J. Y. Kim, I. T. Lim, R. W. Ellsworth, S. Tasaka, G. Guillian, A. Kibayashi, J. G. Learned, S. Matsuno, D. Takemori, M. D. Messier, Y. Hayato, A. K. Ichikawa, T. Ishida, T. Ishii, T. Iwashita, J. Kameda, T. Kobayashi, T. Maruyama, K. Nakamura, K. Nitta, Y. Oyama, M. Sakuda, Y. Totsuka, A. T. Suzuki, M. Hasegawa, K. Hayashi, T. Inagaki, I. Kato, H. Maesaka, T. Morita, T. Nakaya, K. Nishikawa, T. Sasaki, S. Ueda, S. Yamamoto, T. J. Haines, S. Dazeley, S. Hatakeyama, R. Svoboda, E. Blaufuss, J. A. Goodman, G. W. Sullivan, D. Turcan, K. Scholberg, A. Habig, C. K. Jung, T. Kato, K. Kobayashi, M. Malek, C. Mauger, C. McGrew, A. Sarrat, E. Sharkey, C. Yanagisawa, T. Toshito, C. Mitsuda, K. Miyano, T. Shibata, Y. Kajiyama, Y. Nagashima, M. Takita, M. Yoshida, H. I. Kim, S. B. Kim, J. Yoo, H. Okazawa, T. Ishizuka, Y. Choi, H. K. Seo, Y. Gando, T. Hasegawa, K. Inoue, J. Shirai, A. Suzuki, M. Koshiba, T. Hashimoto, Y. Nakajima, K. Nishijima, T. Harada, H. Ishino, M. Morii, R. Nishimura, Y. Watanabe, D. Kielczewska, J. Zalipska, R. Gran, K. K. Shiraishi, K. Washburn, and R. J. Wilkes

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Weakly interacting massive particles, Dark matter, Cosmic ray, Elementary particle, Neutrino, Super-Kamiokande, Light dark matter, Particle identification
Published
2004
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47. Search for Electron Neutrino Appearance in a 250 km Long-Baseline Experiment

Author

C. McGrew, R. Gran, T. Sasaki, Y. Hayato, L. R. Sulak, Makoto Sakuda, K. Nishikawa, Minoru Yoshida, M. H. Ahn, Masaya Hasegawa, M. Miura, Shoji Yamamoto, C. Mauger, M. Sekiguchi, C. W. Walter, J. H. Choi, A. Okada, H. W. Sobel, Tomoyuki Maruyama, Y. Suga, Shigeki Aoki, A. Kibayashi, S. Fukuda, Takaaki Kajita, T. Ishida, S. H. Lim, Yoshitaka Itow, Y. Ashie, Beom Jun Kim, K. Kaneyuki, Takashi Kobayashi, S. Mine, W. Wang, Y. Totsuka, N. Tamura, H. I. Jang, S. B. Boyd, A. Sarrat, David William Casper, Kazumasa Miyano, A. Minamino, F. Nakata, M. Ishitsuka, Y. Fukuda, J. L. Stone, Kate Scholberg, T. Inagaki, Y. Takeuchi, Shinya Yamada, S. Matsuno, H. Yokoyama, Atsumu Suzuki, Shogo Nishiyama, Shigetaka Moriyama, S. Ueda, K. Hayashi, H. C. Bhang, C. K. Jung, M. Y. Pac, D. Kielczewska, E. Kearns, K. K. Shiraishi, Shoei Nakayama, Masaaki Tanaka, Masayuki Nakahata, J. S. Jang, I. Kato, A. K. Ichikawa, Takehisa Hasegawa, J. Kameda, J. Hill, Michael B. Smy, N. Sasao, J. G. Learned, Y. Obayashi, S. B. Kim, C. Saji, W. R. Kropp, E. J. Jeon, T. Iwashita, J. Zalipska, Katsuhiro Kobayashi, Yoshihiro Suzuki, Yuichi Oyama, E. Sharkey, C. O. Kim, J. Y. Kim, Itsuo Nakano, Hwangseo Park, Susumu Noda, T. Ishii, C. Yanagisawa, Toshio Namba, Kenzo Nakamura, H. Maesaka, Taichi Morita, Yusuke Koshio, R. J. Wilkes, I. T. Lim, Mark R. Vagins, R. Nambu, T. Hara, K. K. Joo, Tsuyoshi Nakaya, J. Yoo, Masato Shiozawa, and A. Ikeda

Subjects
Physics, Particle physics, Muon, Meson, FOS: Physical sciences, General Physics and Astronomy, Weinberg angle, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, Neutrino, Neutrino oscillation, Electron neutrino, Lepton
Abstract

We present a search for electron neutrino appearance from accelerator produced muon neutrinos in the K2K long baseline neutrino experiment. One candidate event is found in the data corresponding to an exposure of 4.8*10^19 protons on target. The expected background in the absence of neutrino oscillations is estimated to be 2.4+-0.6 events and is dominated by mis-identification of events from neutral current pi^0 production. We exclude the \nu_\mu to \nu_e oscillations at 90% C.L. for the effective mixing angle in 2-flavor approximation of sin^2(2theta_\mu_e) (~= 1/2 sin^2 2 th_13) > 0.15 at Delta m^2_\mu_e = 2.8*10^{-3} eV^2, the best fit value of the \nu_\mu disappearance analysis in K2K. The most stringent limit of sin^2(2theta_\mu_e) < 0.09 is obtained at Delta m^2_\mu_e = 6*10^{-3} eV^2., Comment: 5 pages with 2 figures embeded in two column revtex4 style. Accepted to be published in Phys. Rev. Lett

Published
2004
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48. Limits on the Neutrino Magnetic Moment using 1496 Days of Super-Kamiokande-I Solar Neutrino Data

Author

G. Guillian, Atsumu Suzuki, K. Hayashi, C. McGrew, Y. Hayato, K. Nishikawa, T. J. Haines, E. Kearns, Toshio Namba, Y. Watanabe, John G. Learned, Y. Totsuka, S. B. Kim, J. L. Stone, T. Inagaki, Kenzo Nakamura, D. Takemori, Shoji Yamamoto, C. Saji, Yusuke Koshio, H. Maesaka, G. W. Sullivan, T. Toshito, M. Earl, M. Ishitsuka, C. K. Jung, D. Kielczewska, C. W. Walter, Katsuhiro Kobayashi, M. D. Messier, H. W. Sobel, T. Hashimoto, T. Ooyabu, Masayuki Nakahata, Takaaki Kajita, C. Mauger, Shantanu Desai, S. Ueda, Michael B. Smy, H. Seo, T. Maruyama, S. Fukuda, Yoshitaka Kuno, I. Kato, A. Okada, W. Wang, Y. Ashie, H. Okazawa, Kunio Inoue, Minoru Yoshida, M. Takita, J. Y. Kim, Mikio Morii, Takehisa Hasegawa, Yuichi Oyama, Y. Obayashi, K. S. Ganezer, K. Kaneyuki, R. Nishimura, Makoto Sakuda, Magdalena Malek, Y. Fukuda, A. K. Ichikawa, Hyosun Kim, T. Ishizuka, T. Shibata, J. Zalipska, K. Martens, S. Mine, A. Minamino, T. Sasaki, J. Kameda, Y. Takeuchi, Shinya Yamada, S. Matsuno, T. Ishida, Taichi Morita, R. W. Ellsworth, L. R. Sulak, M. Ackermann, T. Kobayashi, Y. Kajiyama, Masatoshi Koshiba, Yoshihiro Suzuki, D. W. Liu, B. Viren, Alec Habig, T. Kato, C. W. Sterner, A. Kibayashi, J. Ishii, J. A. Goodman, J. P. Cravens, E. Blaufuss, W. R. Kropp, W. Gajewski, Kate Scholberg, T. Iwashita, K. Nitta, Kyoshi Nishijima, D. Turcan, Hirokazu Ishino, Y. Nakajima, K. Ishihara, David William Casper, J. Shirai, Shigetaka Moriyama, Y. Nagashima, H. Takeuchi, Masaya Hasegawa, M. Miura, Nobuyuki Sakurai, Shoei Nakayama, K. K. Shiraishi, Shigeki Tasaka, E. Sharkey, S. Dazeley, K. Washburn, S. Hatakeyama, R. Gran, C. Mitsuda, Yoshitaka Itow, R. J. Wilkes, I. T. Lim, C. Yanagisawa, J. Yoo, Kazumasa Miyano, Masato Shiozawa, Y. Choi, T. Barszczak, J. Hill, Y. Gando, T. Ishii, R. Nambu, A. Suzuki, R. Svoboda, Tsuyoshi Nakaya, W. E. Keig, and Mark R. Vagins

Subjects
Physics, Particle physics, Magnetic moment, Physics::Instrumentation and Detectors, Solar neutrino, High Energy Physics::Phenomenology, General Physics and Astronomy, Electron, Solar neutrino problem, High Energy Physics - Experiment, Nuclear physics, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Super-Kamiokande, Neutrino oscillation
Abstract

A search for a non-zero neutrino magnetic moment has been conducted using 1496 live days of solar neutrino data from {\SK}. Specifically, we searched for distortions to the energy spectrum of recoil electrons arising from magnetic scattering due to a non-zero neutrino magnetic moment. In the absence of clear signal, we found $\mu_{\nu} \leq 3.6 \times 10^{-10}$ $\mu_{B}$ at 90% C.L. by fitting to the Super-Kamiokande day/night spectra. The fitting took into account the effect of neutrino oscillation on the shapes of energy spectra. With additional information from other solar neutrino and KamLAND experiments constraining the oscillation region, a limit of $\mu_{\nu} \leq 1.1 \times 10^{-10}$ $\mu_{B}$ at 90% C.L. was obtained., Comment: 5 pages, 4 figures

Published
2004
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49. Evidence for Muon Neutrino Oscillation in an Accelerator-Based Experiment

Author

J. Y. Kim, Toshio Namba, H. Maesaka, K. Asakura, P. Kitching, Katsuki Hiraide, S. Ueda, Y. Totsuka, K. McConnel, Jordi Burguet-Castell, H. I. Jang, K. Nakamura, K. Nishikawa, H. Yokoyama, F. Pierre, E. Aliu, Makoto Sakuda, W. Wang, S. M. Oser, W. R. Kropp, Masayuki Nakahata, Mark R. Vagins, S. Yamada, U. Dore, T. Iwashita, S. Mine, A. Cervera, K. Kaneyuki, Ko Okumura, Shigeki Aoki, Michael B. Smy, E. Kearns, Tadayuki Takahashi, L. Ludovici, C. Cavata, S. Matsuno, M. Fechner, Takaaki Kajita, Masataka Iinuma, J. Yoo, A. Rodriguez, D. Kerr, Itsuo Nakano, S. Likhoded, M. Ishitsuka, Masato Shiozawa, K. Hayashi, Yoshihiro Suzuki, Federico Sanchez, Yoshitaka Itow, J. Argyriades, C. K. Jung, Y. Takubo, C. Saji, Y. Takeuchi, D. Kielczewska, Taichi Morita, I. Kato, N. Yershov, R. Schroeter, A. Minamino, N. Tamura, C. McGrew, H. C. Bhang, Silvia Borghi, John G. Learned, A. Konaka, A. Tornero-Lopez, S P Mikheyev, J. Bouchez, M. Y. Pac, Y. Obayashi, Y. Hayato, Lawrence Sulak, T. Kutter, T. Hara, A. Suzuki, Masashi Yokoyama, Masaaki Tanaka, J. L. Stone, C. W. Walter, R. Gran, T. Inagaki, K. K. Joo, Shoji Yamamoto, S. Andringa, A. N. Khotjantsev, Tsuyoshi Nakaya, J. Kubota, Yusuke Koshio, J. H. Choi, A. Blondel, A. Ikeda, Y. Fukuda, M. M. Khabibullin, David William Casper, E. J. Jeon, Stephane T'Jampens, C. Mitsuda, T. Ishida, J. Hosaka, Minoru Yoshida, T. Ishii, E. Fernandez, K. O. Cho, A. K. Ichikawa, E. Sharkey, M. Sekiguchi, Katsuhiro Kobayashi, S. Nawang, O. V. Mineev, F. Nova, G. Jover, G. Sitjes, Yuichi Oyama, K. K. Shiraishi, R. L. Helmer, P. Novella, C. Yanagisawa, J.J. Gómez-Cadenas, P. F. Loverre, C. O. Kim, Y. Takenaga, R. Nambu, Masaya Hasegawa, M. Miura, C. Mariani, Yu. Kudenko, T. Sasaki, V. A. Matveev, K. Taki, R. Ashie, J. Kameda, X. Espinal, Y. Moriguchi, J. Zalipska, R. J. Wilkes, I. T. Lim, R. Terri, Yoshitaka Kuno, Tomoyuki Maruyama, J. Mallet, Kate Scholberg, T. Nakadaira, Takehisa Hasegawa, K. Ishihara, I. S. Jeong, T. Kobayashi, A. Sarrat, C. Mauger, A. Okada, H. G. Berns, Shoei Nakayama, J. Hill, S. B. Kim, K. Nitta, Shigetaka Moriyama, H. W. Sobel, Blondel, Alain, Borghi, Silvia, Cervera Villanueva, Anselmo, and Schroeter, Raphaël

Subjects
Particle physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, FOS: Physical sciences, ddc:500.2, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Muon neutrino, 010306 general physics, Neutrino oscillation, Physics, Tamura, Norio, 010308 nuclear & particles physics, Oscillation, Detector, High Energy Physics::Phenomenology, Sigma, Física, Solar neutrino problem, K2K experiment, Physics::Accelerator Physics, 田村, 詔生, High Energy Physics::Experiment, Beam (structure)
Abstract

We present results for muon neutrino oscillation in the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment. K2K uses an accelerator-produced muon neutrino beam with a mean energy of 1.3 GeV directed at the Super-Kamiokande detector. We observed the energy dependent disappearance of muon neutrino, which we presume have oscillated to tau neutrino. The probability that we would observe these results if there is no neutrino oscillation is 0.0050% (4.0 sigma)., Comment: 5 pages, 4 figures

Published
2004
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50. Search for Supernova Relic Neutrinos at Super-Kamiokande

Author

M. Malek, M. Morii, S. Fukuda, Y. Fukuda, M. Ishitsuka, Y. Itow, T. Kajita, J. Kameda, K. Kaneyuki, K. Kobayashi, Y. Koshio, M. Miura, S. Moriyama, M. Nakahata, S. Nakayama, T. Namba, A. Okada, T. Ooyabu, C. Saji, N. Sakurai, M. Shiozawa, Y. Suzuki, H. Takeuchi, Y. Takeuchi, Y. Totsuka, S. Yamada, S. Desai, M. Earl, E. Kearns, M. D. Messier, J. L. Stone, L. R. Sulak, C. W. Walter, M. Goldhaber, T. Barszczak, D. Casper, W. Gajewski, W. R. Kropp, S. Mine, D. W. Liu, M. B. Smy, H. W. Sobel, M. R. Vagins, A. Gago, K. S. Ganezer, W. E. Keig, R. W. Ellsworth, S. Tasaka, A. Kibayashi, J. G. Learned, S. Matsuno, D. Takemori, Y. Hayato, T. Ishii, T. Kobayashi, T. Maruyama, K. Nakamura, Y. Obayashi, Y. Oyama, M. Sakuda, M. Yoshida, M. Kohama, T. Iwashita, A. T. Suzuki, A. Ichikawa, T. Inagaki, I. Kato, T. Nakaya, K. Nishikawa, T. J. Haines, S. Dazeley, S. Hatakeyama, R. Svoboda, E. Blaufuss, J. A. Goodman, G. Guillian, G. W. Sullivan, D. Turcan, K. Scholberg, A. Habig, M. Ackermann, J. Hill, C. K. Jung, K. Martens, C. Mauger, C. McGrew, E. Sharkey, B. Viren, C. Yanagisawa, T. Toshito, C. Mitsuda, K. Miyano, T. Shibata, Y. Kajiyama, Y. Nagashima, K. Nitta, M. Takita, H. I. Kim, S. B. Kim, J. Yoo, H. Okazawa, T. Ishizuka, M. Etoh, Y. Gando, T. Hasegawa, K. Inoue, K. Ishihara, J. Shirai, A. Suzuki, M. Koshiba, Y. Hatakeyama, Y. Ichikawa, M. Koike, K. Nishijima, H. Ishino, R. Nishimura, Y. Watanabe, D. Kielczewska, H. G. Berns, S. C. Boyd, A. L. Stachyra, and R. J. Wilkes

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, General Physics and Astronomy, Flux, Cosmic ray, Astrophysics, Upper and lower bounds, High Energy Physics - Experiment, Nuclear physics, Supernova, Positron, High Energy Physics::Experiment, Neutrino, Super-Kamiokande, Charged current
Abstract

A search for the relic neutrinos from all past core-collapse supernovae was conducted using 1496 days of data from the Super-Kamiokande detector. This analysis looked for electron-type anti-neutrinos that had produced a positron with an energy greater than 18 MeV. In the absence of a signal, 90% C.L. upper limits on the total flux were set for several theoretical models; these limits ranged from 20 to 130 nu_e bar cm^-2 s^-1. Additionally, an upper bound of 1.2 nu_e bar cm^-2 s^-1 was set for the supernova relic neutrino flux in the energy region E_nu > 19.3 MeV., Comment: 4 pages, 2 figures. Submitted to Physical Review Letters. New version includes corrections to Figure 1. Also, text has been shortened to conform with the space limitations of PRL

Published
2003
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