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101. GEANT4 based simulation framework for particle therapy system

Author

Satoru Kameoka, Takashi Sasaki, Tomohiro Yamashita, T. Aso, Akinori Kimura, and K. Murakami

Subjects
Physics, Carbon therapy, medicine.medical_specialty, Source code, Particle therapy, Interface (Java), Quantitative Biology::Tissues and Organs, medicine.medical_treatment, media_common.quotation_subject, Physics::Medical Physics, Radiation therapy, Medical physicist, medicine, Dosimetry, Medical physics, Simulation, Beam (structure), media_common
Abstract

The particle therapy simulation framework has been developed for radiation therapy using GEANT4 simulation toolkit. The developed simulation framework provides a common interface for composing irradiation systems of different radiation therapy facilities. A particle therapy simulator on the framework represents a treatment room with an irradiation system. Popular beam modifiers for hadron therapy are included in the framework as beam modules and are utilized for composing an irradiation system. The developed framework is designed to be able to customize beam modules as flexible as possible without modifying source codes, because end users such as medical physicists are supposed not to be familiar with developing programming code. Each three types of irradiation systems have been successfully carbon therapy.

Published
2007

102. A climatology of tides in the Antarctic mesosphere and lower thermosphere

Author

T. Aso, Susan K. Avery, Jeffrey M. Forbes, Maura E. Hagan, Robert A. Vincent, Adrian McDonald, Martin J. Jarvis, Richard L. Walterscheid, Grahame J. Fraser, Dennis M. Riggin, Masaki Tsutsumi, Damian J. Murphy, and D. C. Fritts

Subjects
Atmospheric Science, 010504 meteorology & atmospheric sciences, Soil Science, Zonal and meridional, Aquatic Science, Oceanography, Atmospheric sciences, Spatial distribution, 01 natural sciences, Mesosphere, Latitude, Geochemistry and Petrology, 0103 physical sciences, Earth and Planetary Sciences (miscellaneous), Wavenumber, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Earth-Surface Processes, Water Science and Technology, Ecology, Mode (statistics), Paleontology, Forestry, Geophysics, 13. Climate action, Space and Planetary Science, Climatology, Polar, Thermosphere, Geology
Abstract

[1] A function that approximates atmospheric tidal behavior in the polar regions is described. This function is fitted to multistation radar measurements of wind in the mesosphere and lower thermosphere with the aim of obtaining a latitude-longitude-height description of the variation of tides over the whole Antarctic continent. Archival wind data sets are combined with present-day ones to fill the spatial distribution of the observations and to reduce the potential effects of spatial aliasing. Multiple years are combined through the compilation of monthly station composite days, yielding results for each month of the year. Despite potential problems associated with year-to-year variations in the tidal phase, a useful climatology of Antarctic zonal and meridional tidal wind components is compiled. The results of the fits reproduce the major features of the high-latitude tidal wind field: the dominance of the semidiurnal migrating mode in the winter months and the presence of a semidiurnal zonal wave number one component in the summer months. It is also found that the summer semidiurnal tide contains a zonal wave number zero component.

Published
2006

103. Electron Gyroharmonic Effects in Ionization and Electron Acceleration during High-Frequency Pumping in the Ionosphere

Author

T. Aso, B. U. E. Brändström, Michael Kosch, Å. Steen, Thomas Leyser, Björn Gustavsson, and Michael T. Rietveld

Subjects
Physics, Ionization, Incoherent scatter, General Physics and Astronomy, Electron temperature, Electron, Plasma, Ionization energy, Ionosphere, Atomic physics, Thermosphere
Abstract

Optical emissions and incoherent scatter radar data obtained during high-frequency electromagnetic pumping of the ionospheric plasma from the ground give data on electron energization in an energy range from 2 to 100 eV. Optical emissions at 4278 A from N2+ that require electrons with energies above the 18 eV ionization energy give the first images ever of pump-induced ionization of the thermosphere. The intensity at 4278 A is asymmetric around the ionospheric electron gyroharmonic, being stronger above the gyroresonance. This contrasts with emissions at 6300 A from O(1D) and of electron temperature enhancements, which have minima at the gyroharmonic but have no apparent asymmetry. This direct evidence of pump-induced ionization contradicts previous indirect evidence, which indicated that ionization is most efficiently produced when the pump frequency was below the gyroharmonic.

Published
2006

104. Neutral air temperatures at 90 km and 70°N and 78°N

Author

T. Aso, Masaki Tsutsumi, David A. Holdsworth, Fred Sigernes, Chris Hall, and Josef Höffner

Subjects
Atmospheric Science, Ecology, Meteoroid, Oscillation, Paleontology, Soil Science, Forestry, Aquatic Science, Seasonality, Oceanography, Atmospheric temperature, medicine.disease, Mesosphere, Current (stream), Geophysics, Altitude, Arctic, Space and Planetary Science, Geochemistry and Petrology, Climatology, Earth and Planetary Sciences (miscellaneous), medicine, Environmental science, Earth-Surface Processes, Water Science and Technology
Abstract

[1] Meteor radars are employed to determine neutral air temperatures at 90 km altitude above Adventdalen, Spitsbergen (78°N, 16°E) and Ramfjordmoen, mainland Norway (70°N, 19°E). The philosophy underlying the temperature derivation including choice of appropriate pressure model and calibration against independent observations is discussed. Average annual variations at each of the two geographic locations are presented, indicating that current models overestimate the summer temperatures by as much as 20 K. The seasonal variation of variability of these temperatures, indicative of corresponding variation in planetary wave activity, is investigated, and in particular, we see that wave activity at 78°N is largely suppressed during summer and is otherwise characterized by a quasi 27-day oscillation during late autumn and winter. The monthly average temperatures for 78°N presented here are proposed as a viable alternative to current semiempirical models.

Published
2006

105. Beam Test Of The SDC Double-sided Silicon Strip Detector

Author

J. A. J. Matthews, S. Kobayashi, Hartmut Sadrozinski, H. Miyata, N. Ujiie, T. Aso, M. Frautschi, B. Hubbard, T. Ohyama, Alexander Grillo, Fujio Hinode, T. Kohriki, Jeffrey T. Rahn, Helmuth Spieler, A. Webster, Max Wilder, D.E. Dorfan, T. Hatakenaka, A. Seiden, Takafumi Ohmoto, T. Akagi, W.A. Rowe, Masato Higuchi, R. Takashima, J. DeWitt, Y. Iwata, E. Spencer, I. Kipnis, M. Tezuka, N. Tamura, A. Murakami, T. Ohsugi, Motomasa Daigo, and Y. Unno

Subjects
Physics, Silicon, Null (radio), Physics::Instrumentation and Detectors, business.industry, Detector, Electrical engineering, chemistry.chemical_element, Particle detector, Microstrip, Magnetic field, Optics, chemistry, CMOS, business, Beam (structure)
Abstract

A beam test was executed to evaluate the behavior of the first prototype radiation-hard double-sided silicon microstrip sensor for the SDC silicon tracking system. Pions of 4 GeV/c in a test bcamline at KEK illuminated three planes of detectors. Thc signals wcrc amplified, shaped, and discriminated with TEKZ bipolar analog LSI's, and the on-off levels were sampled at l0MHz clock with CMOS digiwl LSI's, asynchronously with beam triggers. The detectors were rotated in null and 1 .O Tesla magnetic fields. The efficiencies were found to be 98-9996. The position resolutions were 12.5pm. where the multi-strip hit fraction was 30-40%. There was no essential difference in the performance of the pand the n-sides. The multi-strip hit fraction showed a clear rotation and magnetic-field dependence. From the angles where the fractions were minimum in the 1T magnetic field, the Hall mobilities of the electrons and holes were obtained to be 1391k43 (clcctrons) and 325f30 (holes) cm2/Vs.

Published
2005

106. A comparison of mesosphere and lower thermosphere neutral winds as determined by meteor and medium-frequency radar at 70°N

Author

Chris Meek, Masaki Tsutsumi, Satonori Nozawa, Chris Hall, T. Aso, and A. H. Manson

Subjects
Meteor (satellite), Meteorology, Meteor radar, Condensed Matter Physics, Atmospheric sciences, Medium frequency, Mesosphere, law.invention, Atmosphere, Altitude, law, General Earth and Planetary Sciences, Environmental science, Electrical and Electronic Engineering, Thermosphere, Radar
Abstract

[1] There has been much discussion as to the veracity of neutral wind measurements made using medium-frequency radar (MFR) employing the spaced-antenna technique. Such systems are able to operate continuously, providing information on mesosphere and lower thermosphere dynamics with typical resolutions of 3 km in altitude and 5 min in time, and thus represent a low-cost monitoring of the atmosphere. It is similarly important to be able to trust the results, and therefore we make a dedicated comparison between the Tromso MFR (70°N, 19°E) and the newly installed and colocated Nippon/Norway Tromso meteor radar. The agreement is particularly good between 75 and 85 km.

Published
2005

108. Self-organizing map hardware accelerator system and its application to realtime image enlargement

Author

T. Aso, Hakaru Tamukoh, Takeshi Yamakawa, and Keiichi Horio

Subjects
Pixel, Xeon, business.industry, Computer science, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Image processing, Digital image, Hardware register, Computer graphics (images), Personal computer, Hardware acceleration, business, Field-programmable gate array, Computer hardware
Abstract

We propose a new fast learning algorithm for SOM and its digital hardware design based on the massively parallel architecture. When this proposed algorithm is realized by using Xilinx XC2V6000-6 FPGA, a maximum performance of 17500 MCUPS is achieved and up to 256 competing units (16 /spl times/ 16 map) can be implemented. Each competing unit have a weight vector which is represented by 128 elements of 16 bits accuracy. Furthermore, we applied the proposed hardware to a realtime digital image enlargement system. In the case of full color (24 bits) image enlargement from QQVGA (160 /spl times/ 120 pixel) to QVGA (320 /spl times/ 240 pixel), a proposed hardware requires only 0.12 second per image, while the personal computer (Intel XEON, 2.8 GHz Dual) requires more than 5 seconds per image.

Published
2005

109. Mean winds, tides, and quasi-2 day wave in the polar lower thermosphere observed in European Incoherent Scatter (EISCAT) 8 day run data in November 2003

Author

S. Maeda, Satonori Nozawa, Ryoichi Fujii, Raymond G. Roble, Asgeir Brekke, Chris Hall, Yasunobu Ogawa, T. Aso, Jürgen Röttger, Stephan Buchert, and Arthur D. Richmond

Subjects
Atmospheric Science, Ecology, Incoherent scatter, Paleontology, Soil Science, Forestry, Zonal and meridional, Aquatic Science, Oceanography, Atmospheric sciences, law.invention, Mesosphere, Geophysics, Altitude, Amplitude, Space and Planetary Science, Geochemistry and Petrology, law, Earth and Planetary Sciences (miscellaneous), Radar, Ionosphere, Thermosphere, Geology, Earth-Surface Processes, Water Science and Technology
Abstract

[1] Simultaneous European Incoherent Scatter (EISCAT) radar observations using two EISCAT radars, the Tromso (69.6°N, 19.2°E) UHF radar and the EISCAT Svalbard radar (Longyearbyen, 78.2°N, 16.0°E), were conducted for 8 consecutive days, from 11 to 19 November 2003, to study the lower thermospheric wind dynamics in the polar region. Altitude profiles of the amplitudes of the diurnal and semidiurnal components at Tromso and Longyearbyen are similar. The semidiurnal amplitudes in the meridional and zonal components exhibit maxima at 105–107 km, with values of ∼70–90 m s−1. The semidiurnal phases vary with roughly a 30 km vertical wavelength between 98 and 110 km. The quasi-2 day wave (Q2DW) was not detected in the lower thermosphere at either Tromso or Longyearbyen during the period, while it was found between 70 and 82 km in the mesosphere with the colocated Tromso MF radar. This observational result suggests that in general, the Q2DW attenuates in the mesosphere and cannot penetrate into the lower thermosphere in winter. Ion drag acceleration of the wind is generally negligible below 107 km at Tromso and below 118 km at Longyearbyen, but significant ion drag acceleration is found above these heights. A comparison of mean wind and tidal amplitudes and phases with National Center for Atmospheric Research Thermosphere-Ionosphere-Mesosphere-Electrodynamics General Circulation Model predictions for the period shows some agreement.

Published
2005

110. The electron energy distribution during HF pumping, a picture painted with all colors

Author

T. Grydeland, J. Jussila, Michael T. Rietveld, P. Gallop, Mitsumu K. Ejiri, Björn Gustavsson, K. Kaila, C. LaHoz, H. Holma, Å. Steen, B. U. E. Brändström, Tima Sergienko, T. Aso, B. Isham, Thomas Leyser, Michael Kosch, EGU, Publication, National Institute of Polar Research [Tokyo] (NiPR), Swedish Institute of Space Physics [Kiruna] (IRF), Department of Communication Systems, EISCAT Scientific Association [Norway], EISCAT Scientific Association, STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC), Dept. of Physics, University of Tromsø (UiT), Remspace Inc., and Oulo University

Subjects
Atmospheric Science, 010504 meteorology & atmospheric sciences, Electron capture, ionosphere atmosphere interaction, Incoherent scatter, Energy-dispersive X-ray spectroscopy, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Electron, 01 natural sciences, 7. Clean energy, Optics, 0103 physical sciences, Earth and Planetary Sciences (miscellaneous), lcsh:Science, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Physics, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, business.industry, ionospheric physics, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, Electron energy loss spectroscopy, lcsh:QC801-809, Geology, Astronomy and Astrophysics, lcsh:QC1-999, lcsh:Geophysics. Cosmic physics, Field electron emission, Space and Planetary Science, Electron excitation, VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437, [SDU.STU] Sciences of the Universe [physics]/Earth Sciences, Electron temperature, lcsh:Q, active experiments, Atomic physics, business, lcsh:Physics
Abstract

The shape of the electron energy distribution has long been a central question in the field of high-frequency radio-induced optical emission experiments. This report presents estimates of the electron energy distribution function, fe(E), from 0 to 60 eV, based on optical multi-wavelength (6300, 5577, 8446, 4278Å) data and 930-MHz incoherent scatter radar measurements of ion temperature, electron temperature and electron concentration. According to our estimate, the electron energy distribution has a depression at around 2 eV, probably caused by electron excitation of vibrational states in N2, and a high energy tail that is clearly supra-thermal. The temporal evolution of the emissions indicates that the electron temperature still plays an important role in providing electrons with energies close to 2 eV. At the higher energies the electron energy distribution has a non-thermal tail. Keywords. Active experiments; Ionosphere atmosphere interaction; Ionospheric physics

Published
2005

112. Multi-instrument derivation of 90 km temperatures over Svalbard (78°N 16°E)

Author

T. Aso, Josef Höffner, Fred Sigernes, Chris Hall, and Masaki Tsutsumi

Subjects
Meteor (satellite), Lidar, Spectrometer, General Earth and Planetary Sciences, Environmental science, Fading, Electrical and Electronic Engineering, Meteor radar, Condensed Matter Physics, Remote sensing, Mesosphere
Abstract

[1] For 90 km above Svalbard at 78°N, 16°E, neutral air temperatures derived from potassium lidar and OH spectrometer observations are combined and used to calibrate the corresponding estimates derived from meteor echo fading times. While lidar and spectrometer results depend heavily on observing conditions, a meteor radar can easily provide daily measurements; the three instruments thus complement each other to yield daily temperature estimates, hence providing a temporal coverage hitherto unprecedented at this location.

Published
2004

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

Author

Y. Chao, P. Chang, K. Abe, N. Abe, I. Adachi, H. Aihara, K. Akai, M. Akatsu, M. Akemoto, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, Y. Ban, M. Barbero, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M.-C. Chang, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, M. Danilov, M. Dash, L. Y. Dong, R. Dowd, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, D. Epifanov, C. W. Everton, F. Fang, J. Flanagan, S. Fratina, H. Fujii, Y. Funakoshi, K. Furukawa, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, B. Golob, M. Grosse Perdekamp, H. Guler, R. Guo, J. Haba, C. Hagner, F. Handa, K. Hara, T. Hara, N. C. Hastings, K. Hasuko, K. Hayasaka, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Higuchi, L. Hinz, T. Hojo, T. Hokuue, Y. Hoshi, K. Hoshina, S. Hou, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, H. Ikeda, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, K. Itoh, R. Itoh, M. Iwamoto, M. Iwasaki, Y. Iwasaki, R. Kagan, H. Kakuno, T. Kamitani, J. H. Kang, J. S. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, N. Kent, H. R. Khan, A. Kibayashi, H. Kichimi, M. Kikuchi, E. Kikutani, H. J. Kim, H. O. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, T. H. Kim, K. Kinoshita, S. Kobayashi, H. Koiso, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, T. Kubo, R. Kulasiri, S. Kumar, C. C. Kuo, H. Kurashiro, E. Kurihara, A. Kusaka, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. E. Lee, S. H. Lee, Y.-J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, M. Masuzawa, T. Matsuishi, H. Matsumoto, S. Matsumoto, T. Matsumoto, A. Matyja, S. Michizono, Y. Mikami, T. Mimashi, W. Mitaroff, K. Miyabayashi, Y. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, G. R. Moloney, G. F. Moorhead, T. Mori, J. Mueller, A. Murakami, T. Nagamine, Y. Nagasaka, T. Nakadaira, I. Nakamura, T. T. Nakamura, E. Nakano, M. Nakao, H. Nakayama, H. Nakazawa, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, A. Ogawa, S. Ogawa, Y. Ogawa, K. Ohmi, Y. Ohnishi, T. Ohshima, N. Ohuchi, K. Oide, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, N. Parslow, L. S. Peak, M. Pernicka, J.-P. Perroud, M. Peters, L. E. Piilonen, A. Poluektov, F. J. Ronga, N. Root, M. Rozanska, H. Sagawa, M. Saigo, S. Saitoh, Y. Sakai, H. Sakamoto, H. Sakaue, T. R. Sarangi, M. Satapathy, N. Sato, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, T. Seki, S. Semenov, K. Senyo, Y. Settai, R. Seuster, M. E. Sevior, T. Shibata, H. Shibuya, T. Shidara, B. Shwartz, V. Sidorov, V. Siegle, J. B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, R. Sugahara, A. Sugi, T. Sugimura, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, S. K. Swain, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, K. Tanabe, M. Tanaka, M. Tawada, G. N. Taylor, Y. Teramoto, X. C. Tian, S. Tokuda, S. N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, K. Uchida, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, M. Watanabe, Y. Watanabe, L. Widhalm, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, H. Yamamoto, N. Yamamoto, S. Yamamoto, T. Yamanaka, Y. Yamashita, M. Yamauchi, Heyoung Yang, P. Yeh, J. Ying, K. Yoshida, M. Yoshida, Y. Yuan, Y. Yusa, H. Yuta, S. L. Zang, C. C. Zhang, J. Zhang, L. M. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, T. Ziegler, D. Žontar, and D. Zürcher

Subjects
Physics, Nuclear physics, Particle physics, KEKB, law, Electron–positron annihilation, General Physics and Astronomy, CP violation, Collider, Mixing (physics), Charged particle, law.invention
Abstract

The evidence for direct charged particles (CP) violation in the decay B0→K+ π- was investigated with 253 fb-1 of data collected with the Belle detector at the KEKB e + e- collider. 275 x 106 BB pairs were used to observe a B→K±π∓ signal with 2140 ±53 events. Mixing induced CP violation in the B sector was established in b → ccs transitions. The result suggests large interference between tree and penguin diagrams and the existence of final state interactions.

Published
2004

114. Measurement of thee+e−→D(*)+D(*)−cross sections

Author

T. Uglov, K. Abe, T. Abe, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, A. M. Bakich, Y. Ban, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, A. Chuvikov, S. Cole, M. Danilov, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, N. C. Hastings, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, H.-C. Huang, K. Inami, A. Ishikawa, H. Iwasaki, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Krokovny, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, H. Matsumoto, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, D. Mohapatra, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, N. Parslow, L. S. Peak, L. E. Piilonen, Y. Sakai, O. Schneider, J. Schümann, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, L. Widhalm, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Heyoung Yang, J. Ying, Y. Yusa, C. C. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Nuclear and High Energy Physics, Crystallography, KEKB, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Heavy quark effective theory, Atomic physics, Belle experiment, Particle identification
Abstract

We report first measurements of e{sup +}e{sup -}{yields}D{sup (*)+}D{sup (*)-} processes far above threshold. The cross sections for e{sup +}e{sup -}{yields}D{sub T}*{sup +}D{sub L}*{sup -} and e{sup +}e{sup -}{yields}D{sup +}D{sub T}*{sup -} at {radical}(s){approx_equal}10.6 GeV/c{sup 2} are measured to be 0.55{+-}0.03{+-}0.05 and 0.62{+-}0.03{+-}0.06 pb, respectively. We set upper limits on the cross sections for e{sup +}e{sup -}{yields}D{sub T}*{sup +}D{sub T}*{sup -}, e{sup +}e{sup -}{yields}D{sub L}*{sup +}D{sub L}*{sup -}, e{sup +}e{sup -}{yields}D{sup +}D{sub L}*{sup -}, and e{sup +}e{sup -}{yields}D{sup +}D{sup -} processes. The analysis is based on 88.9 fb{sup -1} of data collected by the Belle experiment at the KEKB e{sup +}e{sup -} asymmetric collider.

Published
2004

115. Search for the Lepton-Flavor-Violating Decayτ−→μ−ηat Belle

Author

Y. Enari, K. Abe, T. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, I. Bedny, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, B. G. Cheon, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, M. Danilov, L. Y. Dong, S. Eidelman, V. Eiges, D. Epifanov, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, F. Handa, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, A. Kuzmin, Y.-J. Kwon, G. Leder, S. H. Lee, T. Lesiak, S.-W. Lin, J. MacNaughton, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, G. R. Moloney, T. Nagamine, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, C. W. Park, H. Park, K. S. Park, N. Parslow, L. E. Piilonen, A. Poluektov, N. Root, N. Sato, H. Sagawa, S. Saitoh, Y. Sakai, O. Schneider, A. J. Schwartz, S. Semenov, K. Senyo, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, T. Tomura, T. Tsuboyama, S. Uehara, K. Ueno, S. Uno, G. Varner, C. H. Wang, J. G. Wang, Y. Watanabe, B. D. Yabsley, Y. Yamada, M. Yamauchi, Heyoung Yang, J. Ying, Y. Yusa, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Particle physics, Branching fraction, High Energy Physics::Phenomenology, Eta meson, Detector, General Physics and Astronomy, High Energy Physics::Experiment, Limit (mathematics), Nuclear Experiment, Flavor, Lepton
Abstract

We have searched for the lepton flavor violating decay tau(-)-->micro(-)eta using a data sample of 84.3 fb(-1) accumulated with the Belle detector at KEK. The eta meson was detected through the decay modes: eta-->gammagamma and pi(+)pi(-)pi(0). No signal candidates are found, and we obtain an upper limit for the branching fraction B(tau(-)-->micro(-)eta)

Published
2004

116. Measurement of the branching fractions forB→ωKandB→ωπ

Author

C. H. Wang, K. Abe, N. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, T. Aso, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, Y. Ban, S. Banerjee, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, A. Chuvikov, S. Cole, M. Danilov, L. Y. Dong, S. Eidelman, V. Eiges, T. Gershon, B. Golob, J. Haba, N. C. Hastings, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, Y.-J. Kwon, G. Leder, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyata, D. Mohapatra, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Palka, C. W. Park, H. Park, N. Parslow, L. E. Piilonen, A. Poluektov, M. Rozanska, H. Sagawa, Y. Sakai, O. Schneider, J. Schümann, S. Semenov, K. Senyo, V. Sidorov, J. B. Singh, N. Soni, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, N. Tamura, M. Tanaka, Y. Teramoto, T. Tomura, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, G. Varner, C. C. Wang, M.-Z. Wang, Y. Watanabe, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Ying, Y. Yusa, C. C. Zhang, Z. P. Zhang, and D. Žontar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Electron–positron annihilation, Hadron, Resonance, B meson, Branching (polymer chemistry)
Abstract

We report improved measurements of branching fractions for charmless hadronic two-body B meson decays containing an ω meson in the final state. The results are based on a data sample of 78 fb-1 collected on the Y(4S) resonance by the Belle detector. We measure the branching fractions B(B+→ωK+) = (6.5-1.2 +1.3±0.6) × 10-6 and B(B +→ωπ+) = (5.7-1.3 +1.4±0.6) × 10-6. We give 90% confidence upper limits for B(B0→ωK0)

Published
2004

117. Observation of LargeCPViolation and Evidence for DirectCPViolation inB0→π+π−Decays

Author

K. Abe, N. Abe, T. Abe, I. Adachi, H. Aihara, K. Akai, M. Akatsu, M. Akemoto, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, S. Banerjee, A. Bay, I. Bedny, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, A. Chuvikov, S. Cole, M. Danilov, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, D. Epifanov, J. Flanagan, K. Furukawa, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, J. Haba, K. Hara, N. C. Hastings, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, T. Iijima, H. Ikeda, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, M. Iwasaki, Y. Iwasaki, H. Kakuno, T. Kamitani, J. H. Kang, J. S. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, A. Kibayashi, H. Kichimi, E. Kikutani, H. J. Kim, J. H. Kim, S. K. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, Y.-J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, F. Mandl, D. Marlow, H. Matsumoto, T. Matsumoto, A. Matyja, S. Michizono, T. Mimashi, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, G. R. Moloney, A. Murakami, T. Nagamine, Y. Nagasaka, T. Nakadaira, T. T. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, Y. Ogawa, K. Ohmi, T. Ohshima, N. Ohuchi, K. Oide, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, N. Parslow, L. E. Piilonen, N. Root, M. Rozanska, H. Sagawa, Y. Sakai, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, S. Semenov, K. Senyo, H. Shibuya, T. Shidara, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, R. Stamen, S. Stanič, M. Starič, R. Sugahara, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, M. Tawada, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, Heyoung Yang, J. Ying, M. Yokoyama, M. Yoshida, Y. Yusa, C. C. Zhang, Z. P. Zhang, T. Ziegler, D. Žontar, and D. Zürcher

Subjects
Nuclear physics, Physics, Particle physics, Electron–positron annihilation, General Physics and Astronomy, CP violation, B meson
Abstract

The CP violation parameters in Bo → π +π- decay were investigated. The flavor of the accompanying B meson was identified by reconstructing B o→π+π- CP eigenstate. It was observed that the expected sensitivity was optimized using the ratio LR. The study showed that there was a direct CP violation with a significance at or greater than 3.2σ.

Published
2004

118. Study ofB−→D**0π−(D**0→D(*)+π−)decays

Author

K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, S. Banerjee, A. Bay, I. Bedny, P. K. Behera, I. Bizjak, S. Blyth, A. Bondar, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, R. Guo, C. Hagner, F. Handa, T. Hara, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, N. Katayama, T. Kawasaki, H. Kichimi, H. J. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, K. Kinoshita, P. Križan, P. Krokovny, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, N. Parslow, L. S. Peak, J.-P. Perroud, L. E. Piilonen, N. Root, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, M. Satapathy, A. Satpathy, O. Schneider, C. Schwanda, S. Semenov, K. Senyo, M. E. Sevior, B. Shwartz, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, Y. Teramoto, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M. Watanabe, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, Y. Yuan, Y. Yusa, C. C. Zhang, J. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, and D. Žontar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Pion, Meson, Electron–positron annihilation, Hadron, Analytical chemistry, Dalitz plot, B meson, Belle experiment, B-factory
Abstract

We report the results of a study of charged B decays to the D(+/-)pi(-/+)pi(-/+) and D(*+/-)pi(-/+)pi(-/+) final states using complete D-(*) reconstruction. The contributions of two-body B-->D**pi decays with narrow (j=3/2) and broad (j=1/2) D** states have been determined and the masses and widths of four D** states have been measured. This is the first observation of the broad P-wave D-0*(0) and D'(0)(1) mesons. The analysis is based on a data sample of 65 million B(B) over bar pairs collected in the Belle experiment.

Published
2004

119. Measurement of theB→K*γbranching fractions and asymmetries

Author

M. Nakao, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, Y. Ban, A. Bay, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, M. Danilov, M. Dash, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, M. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, T. H. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y.-J. Kwon, J. S. Lange, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, H. Nakazawa, K. Neichi, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, P. Pakhlov, H. Palka, H. Park, N. Parslow, L. S. Peak, L. E. Piilonen, F. J. Ronga, M. Rozanska, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, B. Shwartz, J. B. Singh, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, M. Tanaka, G. N. Taylor, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, M.-Z. Wang, M. Watanabe, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Heyoung Yang, J. Ying, Y. Yusa, C. C. Zhang, J. Zhang, Z. P. Zhang, V. Zhilich, T. Ziegler, and D. Žontar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Electron–positron annihilation, media_common.quotation_subject, Isospin, Radiative decay, B meson, Branching (polymer chemistry), Asymmetry, media_common
Abstract

We report measurements of the radiative decay B --> K^*\gamma. The analysis is based on a data sample containing 85.0*10^6 B meson pairs collected by the Belle detector at the KEKB storage ring. We measure branching fractions of Br(B^0 --> K^{*0}\gamma) = (4.01 \pm 0.21 \pm 0.17)*10^{-5} and Br(B^+ --> K^{*+}\gamma) = (4.25 \pm 0.31 \pm 0.24)*10^{-5}, where the first and second errors are statistical and systematic, respectively. The isospin asymmetry between B^0 and B^+ decay widths is measured to be \Delta_{0+} = +0.012 \pm 0.044 \pm 0.026. We search for a partial rate asymmetry between CP conjugate modes, and find A_{cp}(B --> K^*\gamma) = =0.015 \pm 0.044 \pm 0.012.

Published
2004

120. Improved measurements of the branching fractions forB→Kπ,ππ, andKK¯decays

Author

Y. Chao, K. Suzuki, Y. Unno, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, S. Banerjee, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, M. Danilov, M. Dash, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, A. Gordon, J. Haba, T. Hara, M. Hazumi, I. Higuchi, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, A. Limosani, S.-W. Lin, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, N. Parslow, L. S. Peak, L. E. Piilonen, M. Rozanska, H. Sagawa, S. Saitoh, Y. Sakai, O. Schneider, J. Schümann, A. J. Schwartz, S. Semenov, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, O. Tajima, F. Takasaki, N. Tamura, M. Tanaka, Y. Teramoto, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, G. Varner, C. H. Wang, J. G. Wang, M.-Z. Wang, M. Watanabe, Y. Yamada, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, H. Yanai, Heyoung Yang, J. Ying, Y. Yuan, S. L. Zang, J. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Electron–positron annihilation, Hadron, Resonance, Branching (polymer chemistry), Storage ring, Bar (unit)
Abstract

We report improved measurements of branching fractions for $B\to K\pi$, $\pi^+\pi^-$, $\pi^+\pi^0$ and $K\bar{K}$ decays based on a data sample of 85.0 million $B\bar{B}$ pairs collected at the $\Upsilon (4S)$ resonance with the Belle detector at the KEKB $e^+e^-$ storage ring. This data sample is almost three times larger than the sample previously used. We observe clear signals for $B\to K\pi$, $\pi^+\pi^-$ and $\pi^+\pi^0$ decays and set upper limits on $B\to K\bar{K}$ decays. The results can be used to give model-dependent constraints on the CKM angle $\phi_3$, as well as limits on the hadronic uncertainty in the time-dependent analysis of the angle $\phi_2$.

Published
2004

121. Upper Bound on the Decayτ→μγfrom the Belle Detector

Author

K. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, K. Akai, M. Akatsu, M. Akemoto, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, S. Banerjee, A. Bay, I. Bedny, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, J. Flanagan, C. Fukunaga, K. Furukawa, N. Gabyshev, A. Garmash, T. Gershon, R. Guo, J. Haba, C. Hagner, F. Handa, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, T. Iijima, H. Ikeda, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, E. Kikutani, H. J. Kim, J. H. Kim, S. K. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Krokovny, R. Kulasiri, A. Kuzmin, Y.-J. Kwon, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, A. Matyja, S. Michizono, T. Mimashi, W. Mitaroff, K. Miyabayashi, H. Miyata, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, T. T. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, Y. Ogawa, K. Ohmi, Y. Ohnishi, T. Ohshima, N. Ohuchi, T. Okabe, S. Okuno, W. Ostrowicz, H. Ozaki, H. Palka, C. W. Park, H. Park, N. Parslow, L. E. Piilonen, N. Root, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, J. Schümann, A. J. Schwartz, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, T. Shidara, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, M. Tawada, G. N. Taylor, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, G. Varner, C. C. Wang, C. H. Wang, J. G. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, Heyoung Yang, M. Yoshida, Y. Yusa, Z. P. Zhang, Y. Zheng, V. Zhilich, and D. Žontar

Subjects
Physics, Particle physics, Branching fraction, Electron–positron annihilation, High Energy Physics::Phenomenology, Detector, General Physics and Astronomy, High Energy Physics::Experiment, Limit (mathematics), Upper and lower bounds, Signal, Confidence interval
Abstract

We have performed a search for the lepton-flavor-violating decay tau -> mu gamma using a data sample of 86.3fb^{-1} accumulated by the Belle detector at KEK. No evidence for a signal is seen, and we set an upper limit for the branching fraction of B(tau -> mu gamma) < 3.1 x 10^{-7} at the 90% confidence level.

Published
2004

122. A code-reduction technique for an image enlargement by using a SOM-based fuzzy interpolation

Author

T. Aso, Takeshi Yamakawa, and Noriaki Suetake

Subjects
Adaptive neuro fuzzy inference system, Fuzzy classification, business.industry, Fuzzy set, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Codebook, Pattern recognition, Image processing, Defuzzification, Computer Science::Computer Vision and Pattern Recognition, Fuzzy set operations, Artificial intelligence, business, Interpolation, Mathematics
Abstract

We propose a new image enlargement method employing a codebook-based fuzzy interpolation technique in order to realize simultaneous smoothing and sharpening in image enlargement. In the proposed method, codebooks are generated by using self-organizing maps, and codes of the codebooks are used to determine parameters of Gaussian membership functions in the fuzzy rules. Then, an enlargement of an image is achieved by a fuzzy inference. In this paper, experimental results show the performances of the proposed method superior to other typical image enlargement methods. The calculation time is reduced drastically in comparison with the previous codebook-based method which has been proposed by the authors.

Published
2004

123. Search for the lepton-flavor-violating decay tau- --micro-eta at Belle

Author

Y, Enari, K, Abe, T, Abe, I, Adachi, H, Aihara, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, I, Bedny, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, Y, Chao, B G, Cheon, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, M, Danilov, L Y, Dong, S, Eidelman, V, Eiges, D, Epifanov, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, F, Handa, T, Hara, K, Hayasaka, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, W-S, Hou, H-C, Huang, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, H, Iwasaki, M, Iwasaki, Y, Iwasaki, J H, Kang, J S, Kang, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, H J, Kim, J H, Kim, K, Kinoshita, P, Koppenburg, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, A, Kuzmin, Y-J, Kwon, G, Leder, S H, Lee, T, Lesiak, S-W, Lin, J, MacNaughton, F, Mandl, T, Matsumoto, A, Matyja, W, Mitaroff, H, Miyake, H, Miyata, G R, Moloney, T, Nagamine, E, Nakano, M, Nakao, H, Nakazawa, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, P, Pakhlov, C W, Park, H, Park, K S, Park, N, Parslow, L E, Piilonen, A, Poluektov, N, Root, N, Sato, H, Sagawa, S, Saitoh, Y, Sakai, O, Schneider, A J, Schwartz, S, Semenov, K, Senyo, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, N, Soni, S, Stanic, M, Staric, A, Sugi, K, Sumisawa, T, Sumiyoshi, S Y, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, Y, Teramoto, T, Tomura, T, Tsuboyama, S, Uehara, K, Ueno, S, Uno, G, Varner, C H, Wang, J G, Wang, Y, Watanabe, B D, Yabsley, Y, Yamada, M, Yamauchi, Heyoung, Yang, J, Ying, Y, Yusa, Z P, Zhang, V, Zhilich, and D, Zontar

Abstract

We have searched for the lepton flavor violating decay tau(-)--micro(-)eta using a data sample of 84.3 fb(-1) accumulated with the Belle detector at KEK. The eta meson was detected through the decay modes: eta--gammagamma and pi(+)pi(-)pi(0). No signal candidates are found, and we obtain an upper limit for the branching fraction B(tau(-)--micro(-)eta)3.4 x 10(-7) at the 90% confidence level.

Published
2004

124. Observation ofB+→pp¯π+,B0→pp¯K0, andB+→pp¯K*+

Author

M.-Z. Wang, K. Abe, T. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bay, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, P. H. Chu, A. Chuvikov, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, T. Hara, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y.-J. Kwon, J. S. Lange, S. H. Lee, T. Lesiak, A. Limosani, S.-W. Lin, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, H. Miyake, H. Miyata, T. Nagamine, Y. Nagasaka, E. Nakano, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, N. Parslow, L. E. Piilonen, M. Rozanska, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, O. Schneider, A. J. Schwartz, S. Semenov, H. Shibuya, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, S. Uno, G. Varner, K. E. Varvell, C. H. Wang, J. G. Wang, Y. Watanabe, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Ying, Y. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Crystallography, General Physics and Astronomy, Type (model theory)
Abstract

We report the first observation of a $b\ensuremath{\rightarrow}u$ type charmless baryonic $B$ decay, ${B}^{+}\ensuremath{\rightarrow}p\overline{p}{\ensuremath{\pi}}^{+}$, as well as $b\ensuremath{\rightarrow}s$ type ${B}^{0}\ensuremath{\rightarrow}p\overline{p}{K}^{0}$ and ${B}^{+}\ensuremath{\rightarrow}p\overline{p}{K}^{*+}$ decays. The analysis is based on a $78\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample recorded on the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at KEKB. We find $\mathcal{B}({B}^{+}\ensuremath{\rightarrow}p\overline{p}{\ensuremath{\pi}}^{+})=({3.06}_{\ensuremath{-}0.62}^{+0.73}\ifmmode\pm\else\textpm\fi{}0.37)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$, $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}p\overline{p}{K}^{0})=({1.88}_{\ensuremath{-}0.60}^{+0.77}\ifmmode\pm\else\textpm\fi{}0.23)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$, and $\mathcal{B}({B}^{+}\ensuremath{\rightarrow}p\overline{p}{K}^{*+})=({10.3}_{\ensuremath{-}2.8\ensuremath{-}1.7}^{+3.6+1.3})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$. We also update $\mathcal{B}({B}^{+}\ensuremath{\rightarrow}p\overline{p}{K}^{+})=({5.66}_{\ensuremath{-}0.57}^{+0.67}\ifmmode\pm\else\textpm\fi{}0.62)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ and present an upper limit on $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}p\overline{p}{K}^{*0})$ at the 90% confidence level. A common feature of the observed decay modes is threshold peaking in baryon pair invariant mass.

Published
2004

125. Measurement of|Vub|Using InclusiveB→XuℓνDecays with a NovelXu-Reconstruction Method

Author

H. Kakuno, K. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, S. Banerjee, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, Y. Chao, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, M. Danilov, M. Dash, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, C. Hagner, T. Hara, M. Hazumi, I. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, Y.-J. Kwon, G. Leder, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, J. MacNaughton, F. Mandl, A. Matyja, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyata, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, C. W. Park, H. Park, K. S. Park, N. Parslow, L. S. Peak, L. E. Piilonen, H. Sagawa, S. Saitoh, Y. Sakai, O. Schneider, A. J. Schwartz, S. Semenov, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugiyama, T. Sumiyoshi, S. Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, M. Watanabe, Y. Watanabe, B. D. Yabsley, Y. Yamada, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, H. Yanai, Heyoung Yang, Y. Yuan, Y. Yusa, J. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Nuclear physics, Physics, Particle physics, Computer data analysis, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, Neutrino, Reconstruction method
Abstract

We report the measurement of an inclusive partial branching fraction for charmless semileptonic B decay and the extraction of /V(ub)/. Candidates for B-->X(u)lnu are identified with a novel X(u) reconstruction method based on neutrino reconstruction via missing 4-momentum and a technique called "simulated annealing." Based on 86.9 fb(-1) of data taken with the Belle detector, we obtain DeltaB(B-->X(u)lnu;M(X) 8.0 GeV2/c2)=[7.37+/-0.89(stat)+/-1.12(syst)+/-0.55(b-->c)+/-0.24(b-->u)]x10(-4) and determine |V(ub)|=[4.66+/-0.28(stat)+/-0.35(syst)+/-0.17(b-->c)+/-0.08(b-->u)+/-0.58(theory)]x10(-3).

Published
2004

126. Search forB−→J/ψΛp¯decay

Author

S. L. Zang, K. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, M. Danilov, L. Y. Dong, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, R. Guo, C. Hagner, F. Handa, N. C. Hastings, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, J. H. Kim, S. K. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Palka, H. Park, N. Parslow, L. E. Piilonen, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, M. Satapathy, A. Satpathy, O. Schneider, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, G. Varner, C. C. Wang, C. H. Wang, J. G. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Ying, Y. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, KEKB, law, Branching fraction, Electron–positron annihilation, Limit (mathematics), Collider, Resonance (particle physics), law.invention
Abstract

We report the results of a search for B- → J/ ψ Λp based on a data set of 78 fb-1 data collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric e - collider. No substantial signal is found, and we set the branching fraction upper limit Β(- → J/ ψ Λp)

Published
2004

127. Observation of large CP violation and evidence for direct CP violation in B0--pi(+)pi(-) decays

Author

K, Abe, N, Abe, T, Abe, I, Adachi, H, Aihara, K, Akai, M, Akatsu, M, Akemoto, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, S, Banerjee, A, Bay, I, Bedny, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, Y, Chao, K F, Chen, B G, Cheon, R, Chistov, S K, Choi, Y, Choi, A, Chuvikov, S, Cole, M, Danilov, J, Dragic, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, D, Epifanov, J, Flanagan, K, Furukawa, N, Gabyshev, A, Garmash, T, Gershon, B, Golob, J, Haba, K, Hara, N C, Hastings, H, Hayashii, M, Hazumi, L, Hinz, T, Hokuue, Y, Hoshi, W S, Hou, Y B, Hsiung, H C, Huang, T, Iijima, H, Ikeda, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, H, Iwasaki, M, Iwasaki, Y, Iwasaki, H, Kakuno, T, Kamitani, J H, Kang, J S, Kang, P, Kapusta, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, A, Kibayashi, H, Kichimi, E, Kikutani, H J, Kim, J H, Kim, S K, Kim, K, Kinoshita, P, Koppenburg, S, Korpar, P, Krizan, P, Krokovny, S, Kumar, A, Kuzmin, Y J, Kwon, J S, Lange, G, Leder, S H, Lee, Y J, Lee, T, Lesiak, J, Li, A, Limosani, S W, Lin, D, Liventsev, J, MacNaughton, F, Mandl, D, Marlow, H, Matsumoto, T, Matsumoto, A, Matyja, S, Michizono, T, Mimashi, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, D, Mohapatra, G R, Moloney, A, Murakami, T, Nagamine, Y, Nagasaka, T, Nakadaira, T T, Nakamura, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, K, Neichi, S, Nishida, O, Nitoh, S, Noguchi, T, Nozaki, S, Ogawa, Y, Ogawa, K, Ohmi, T, Ohshima, N, Ohuchi, K, Oide, T, Okabe, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, N, Parslow, L E, Piilonen, N, Root, M, Rozanska, H, Sagawa, Y, Sakai, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, S, Semenov, K, Senyo, H, Shibuya, T, Shidara, B, Shwartz, V, Sidorov, J B, Singh, N, Soni, R, Stamen, S, Stanic, M, Staric, R, Sugahara, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, O, Tajima, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, M, Tawada, Y, Teramoto, T, Tomura, T, Tsuboyama, T, Tsukamoto, S, Uehara, T, Uglov, K, Ueno, Y, Unno, S, Uno, G, Varner, K E, Varvell, C C, Wang, C H, Wang, M Z, Wang, Y, Watanabe, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, Heyoung, Yang, J, Ying, M, Yokoyama, M, Yoshida, Y, Yusa, C C, Zhang, Z P, Zhang, T, Ziegler, D, Zontar, and D, Zürcher

Abstract

We report the first observation of CP violation in B0--pi(+)pi(-) decays based on 152x10(6) gamma (4S)--BB decays collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We reconstruct a B0--pi(+)pi(-) CP eigenstate and identify the flavor of the accompanying B meson from its decay products. From the distribution of the time intervals between the two B meson decay points, we obtain A(pipi)=+0.58+/-0.15(stat)+/-0.07(syst) and S(pipi)=-1.00+/-0.21(stat)+/-0.07(syst). We rule out the CP-conserving case, A(pipi)=S(pipi)=0, at a level of 5.2 standard deviations. We also find evidence for direct CP violation with a significance at or greater than 3.2 standard deviations for any S(pipi) value.

Published
2004

128. Observation of theDsJ(2317)andDsJ(2457)inBDecays

Author

P. Krokovny, K. Abe, T. Abe, I. Adachi, H. Aihara, K. Akai, M. Akatsu, M. Akemoto, Y. Asano, T. Aso, T. Aushev, A. M. Bakich, I. Bedny, P. K. Behera, I. Bizjak, A. Bondar, M. Bračko, T. E. Browder, B. C. K. Casey, Y. Chao, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, L. Y. Dong, J. Dragic, S. Eidelman, V. Eiges, Y. Enari, J. Flanagan, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, R. Guo, C. Hagner, F. Handa, N. C. Hastings, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, Y. Igarashi, H. Ikeda, A. Ishikawa, R. Itoh, H. Iwasaki, M. Iwasaki, H. K. Jang, T. Kamitani, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, E. Kikutani, D. W. Kim, H. J. Kim, Hyunwoo Kim, J. H. Kim, K. Kinoshita, H. Koiso, P. Koppenburg, S. Korpar, P. Križan, A. Kuzmin, Y.-J. Kwon, J. S. Lange, S. H. Lee, T. Lesiak, A. Limosani, S.-W. Lin, J. MacNaughton, G. Majumder, F. Mandl, M. Masuzawa, T. Matsumoto, S. Michizono, Y. Mikami, W. Mitaroff, H. Miyata, D. Mohapatra, G. R. Moloney, T. Nagamine, Y. Nagasaka, T. Nakadaira, T. T. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, Y. Ogawa, Y. Ohnishi, T. Ohshima, N. Ohuchi, K. Oide, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Palka, C. W. Park, H. Park, K. S. Park, N. Parslow, L. E. Piilonen, N. Root, M. Rozanska, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, A. Satpathy, O. Schneider, C. Schwanda, A. J. Schwartz, S. Semenov, M. E. Sevior, H. Shibuya, T. Shidara, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, A. Sugi, K. Sumisawa, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, M. Tawada, Y. Teramoto, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. E. Varvell, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, N. Yamamoto, Y. Yamashita, M. Yamauchi, H. Yanai, Y. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Nuclear physics, KEKB, Electron–positron annihilation, General Physics and Astronomy, Atomic physics, Bar (unit)
Abstract

We report the first observation of the B-->(D) over barD(sJ)(2317) and B-->(D) over barD(sJ)(2457) decays based on 123.8x10(6) B (B) over bar events collected with the Belle detector at KEKB. We observe the D-sJ(2317) decay to D(s)pi(0) and the D-sJ(2457) decay to the D(s)(*)pi(0) and D(s)gamma final states. We also set 90% C.L. upper limits for the decays D-sJ(2317)-->D-s*gamma, D-sJ(2457)-->D-s*gamma, D-sJ(2457)-->D(s)pi(0), and D-sJ(2457)-->D(s)pi(+)pi(-).

Published
2003

129. Search forB0→l+l−at the Belle detector

Author

T. Iijima, V.A. Sidorov, M. H. Tanaka, T. Tomura, K. F. Chen, Hiroyuki Sagawa, S. Ogawa, I. Bedny, J. Li, L. E. Piilonen, P. Pakhlov, S. Uehara, H. Nakazawa, G. Gokhroo, L. Y. Dong, A. J. Schwartz, Y. Choi, Daniel Robert Marlow, T. Aso, A. Bozek, Y. B. Hsiung, T. Aushev, S. L. Olsen, A.S. Kuzmin, Y. Chao, Masashi Hazumi, R. Chistov, H. Ozaki, H. Miyake, Antonio Limosani, S. H. Lee, T. R. Sarangi, M. C. Chang, N. Parslow, Y. Iwasaki, S. Nishida, H. Kawai, S.I. Eidelman, Y. J. Kwon, M. Iwasaki, B. Golob, O. Schneider, C. C. Wang, N. Soni, T. Sumiyoshi, E. Nakano, Z. Natkaniec, T. Ohshima, Takehiko Mori, M. Akatsu, C. H. Wang, Yasushi Nagasaka, H. J. Kim, H. Miyata, I. Adachi, K. Ueno, T. Hokuue, M. Starič, Y. Hoshi, Seong Keun Kim, Kazuo Abe, B. D. Yabsley, T. Hara, Y. Asano, P. Krokovny, N. Gabyshev, H. Yanai, You-Jin Yuan, Y. Sakai, S. Okuno, Yasuhiko Yamada, A. Bondar, M. Rozanska, J. Schümann, W. S. Hou, A. Yamaguchi, Jasvinder A. Singh, S. W. Lin, S. Korpar, Jolanta Brodzicka, J. S. Kang, Takuya Higuchi, T. E. Browder, D. Žontar, V.N. Zhilich, D. Mohapatra, T. Abe, V.M. Aulchenko, Patrick Koppenburg, S. Semenov, W. A. Mitaroff, Y. Yusa, H. Shibuya, Y. Teramoto, J. Ying, N. Tamura, T. Okabe, Young-Il Choi, V. Eiges, A. Sugi, Y. Watanabe, O. Nitoh, H. K. Park, H. Kichimi, M. Bračko, Y. Yamashita, K. Inami, P. Chang, Hiroaki Aihara, Jung-Hyun Kim, T. Tsuboyama, T. Nagamine, H. C. Huang, T. Lesiak, Zhenyu Zhang, H. Hayashii, T. Ziegler, S. K. Choi, M. Z. Wang, K. Kinoshita, S. Saitoh, T. J. Gershon, F. Mandl, B. Shwartz, Chikara Fukunaga, M. E. Sevior, S. Noguchi, W. Ostrowicz, S. Uno, Hiroyuki Iwasaki, T. Tsukamoto, M. Nakao, Byung Gu Cheon, A. Chuvikov, I. Bizjak, G. S. Varner, R. Itoh, M. Yamauchi, T. Kawasaki, S. Stanič, P. Kapusta, A. Ishikawa, F. Takasaki, Ju Hwan Kang, S. Y. Suzuki, K. Sumisawa, Kevin Varvell, L. Hinz, Akira Sugiyama, A. Matyja, T. Matsumoto, A. M. Bakich, and J. MacNaughton

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Detector
Abstract

We report the results of a search for the decay B-0-->e(+)e(-), mu(+)mu(-) and e(+/-)mu(-/+) based on an analysis of 78 fb(-1) of data collected by the Belle detector at KEKB. No candidate events have been found. Upper limits on the branching fractions are calculated at the 90% confidence level: B(B-0-->e(+)e(-)) B(B-0-->mu(+)mu(-)) e(+/-)mu(-/+)) 46 TeV/c(2) is obtained at the 90% confidence level.

Published
2003

130. Observation ofB→K*ℓ+ℓ−

Author

A. Ishikawa, K. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, K. Akai, M. Akatsu, M. Akemoto, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, A. Bay, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, J. Flanagan, C. Fukunaga, Y. Funakoshi, K. Furukawa, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, R. Guo, J. Haba, C. Hagner, F. Handa, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, T. Iijima, K. Inami, R. Itoh, H. Iwasaki, M. Iwasaki, Y. Iwasaki, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, E. Kikutani, H. J. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, M. Masuzawa, T. Matsumoto, A. Matyja, S. Michizono, T. Mimashi, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, T. T. Nakamura, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, Y. Ogawa, K. Ohmi, Y. Ohnishi, T. Ohshima, N. Ohuchi, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Palka, C. W. Park, H. Park, N. Parslow, L. S. Peak, L. E. Piilonen, N. Root, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, M. Satapathy, A. Satpathy, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, T. Shidara, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, S. K. Swain, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, M. Tawada, G. N. Taylor, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, G. Varner, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, Heyoung Yang, J. Ying, M. Yoshida, Y. Yusa, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Nuclear physics, Physics, Muon, KEKB, Electron–positron annihilation, Analytical chemistry, General Physics and Astronomy
Abstract

We report the observation of the flavor-changing neutral current decay B-->K*l(+l-) and an improved measurement of the decay B-->Kl(+l-), where l represents an electron or a muon, with a data sample of 140 fb(-1) accumulated at the Y(4S) resonance with the Belle detector at KEKB. The results for the branching fractions are B(B-->K*l(+l-))=(11.5(-2.4)(+2.6)+/-0.8+/-0.2)x10(-7) and B(B-->Kl(+l-))=(4.8(-0.9)(+1.0)+/-0.3+/-0.1)x10(-7), where the first error is statistical, the second is systematic and the third is from model dependence.

Published
2003

131. Evidence forB→ϕϕK

Author

H.-C. Huang, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, A. Bay, I. Bedny, P. K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, R. Guo, J. Haba, F. Handa, T. Hara, N. C. Hastings, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, H. J. Kim, Hyunwoo Kim, J. H. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, Y.-J. Kwon, G. Leder, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, H. Matsumoto, T. Matsumoto, W. Mitaroff, H. Miyata, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Palka, C. W. Park, H. Park, K. S. Park, N. Parslow, J.-P. Perroud, M. Peters, L. E. Piilonen, M. Rozanska, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, A. Satpathy, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, T. Seki, S. Semenov, M. E. Sevior, T. Shibata, H. Shibuya, V. Sidorov, J. B. Singh, S. Stanič, M. Starič, A. Sugi, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, T. Tomura, S. N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, Heyoung Yang, Y. Yusa, C. C. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, and D. Žontar

Subjects
General Physics and Astronomy
Published
2003

132. Measurement of /V(ub)/ using inclusive B--X(u)lnu decays with a novel X(u)-reconstruction method

Author

H, Kakuno, K, Abe, I, Adachi, H, Aihara, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, S, Banerjee, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, Y, Chao, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, S, Cole, M, Danilov, M, Dash, L Y, Dong, J, Dragic, A, Drutskoy, S, Eidelman, V, Eiges, N, Gabyshev, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, J, Haba, C, Hagner, T, Hara, M, Hazumi, I, Higuchi, L, Hinz, T, Hokuue, Y, Hoshi, W-S, Hou, H-C, Huang, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, H, Iwasaki, Y, Iwasaki, J H, Kang, J S, Kang, P, Kapusta, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, H J, Kim, J H, Kim, K, Kinoshita, S, Korpar, P, Krizan, P, Krokovny, Y-J, Kwon, G, Leder, S H, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, J, MacNaughton, F, Mandl, A, Matyja, Y, Mikami, W, Mitaroff, K, Miyabayashi, H, Miyata, G R, Moloney, T, Mori, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, P, Pakhlov, C W, Park, H, Park, K S, Park, N, Parslow, L S, Peak, L E, Piilonen, H, Sagawa, S, Saitoh, Y, Sakai, O, Schneider, A J, Schwartz, S, Semenov, K, Senyo, M E, Sevior, H, Shibuya, B, Shwartz, V, Sidorov, J B, Singh, N, Soni, S, Stanic, M, Staric, A, Sugiyama, T, Sumiyoshi, S Y, Suzuki, O, Tajima, F, Takasaki, K, Tamai, M, Tanaka, Y, Teramoto, T, Tomura, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, T, Uglov, Y, Unno, S, Uno, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, M, Watanabe, Y, Watanabe, B D, Yabsley, Y, Yamada, A, Yamaguchi, H, Yamamoto, Y, Yamashita, M, Yamauchi, H, Yanai, Heyoung, Yang, Y, Yuan, Y, Yusa, J, Zhang, Z P, Zhang, V, Zhilich, and D, Zontar

Abstract

We report the measurement of an inclusive partial branching fraction for charmless semileptonic B decay and the extraction of /V(ub)/. Candidates for B--X(u)lnu are identified with a novel X(u) reconstruction method based on neutrino reconstruction via missing 4-momentum and a technique called "simulated annealing." Based on 86.9 fb(-1) of data taken with the Belle detector, we obtain DeltaB(B--X(u)lnu;M(X)1.7 GeV/c2,q28.0 GeV2/c2)=[7.37+/-0.89(stat)+/-1.12(syst)+/-0.55(b--c)+/-0.24(b--u)]x10(-4) and determine |V(ub)|=[4.66+/-0.28(stat)+/-0.35(syst)+/-0.17(b--c)+/-0.08(b--u)+/-0.58(theory)]x10(-3).

Published
2003

133. Measurement of Branching Fractions and Polarization inB→φK(*)Decays

Author

K.-F. Chen, A. Bozek, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, A. M. Bakich, Y. Ban, E. Banas, A. Bay, P. K. Behera, I. Bizjak, A. Bondar, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, M.-C. Chang, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, M. Danilov, M. Dash, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, R. Guo, J. Haba, C. Hagner, F. Handa, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, M. Jones, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, D. W. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Krokovny, A. Kuzmin, Y.-J. Kwon, J. S. Lange, S. H. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, J. MacNaughton, F. Mandl, D. Marlow, H. Matsumoto, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, D. Mohapatra, T. Mori, T. Nagamine, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Palka, C. W. Park, H. Park, K. S. Park, N. Parslow, L. S. Peak, M. Peters, L. E. Piilonen, N. Root, M. Rozanska, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, M. Satapathy, A. Satpathy, O. Schneider, J. Schümann, A. J. Schwartz, S. Semenov, K. Senyo, M. E. Sevior, V. Sidorov, J. B. Singh, S. Stanič, M. Starič, A. Sugi, K. Sumisawa, T. Sumiyoshi, S. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, T. Tomura, T. Tsuboyama, T. Tsukamoto, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, M. Watanabe, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, P. Yeh, M. Yokoyama, Y. Yusa, C. C. Zhang, J. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, and D. Žontar

Subjects
Physics, Particle physics, KEKB, Electron–positron annihilation, General Physics and Astronomy, Polarization (waves), Helicity
Abstract

We present the first measurement of decay amplitudes in $B\ensuremath{\rightarrow}\ensuremath{\varphi}{K}^{*}$ and measurements of branching fractions in $B\ensuremath{\rightarrow}\ensuremath{\varphi}{K}^{(*)}$ decays based on $78.1\text{ }{\mathrm{f}\mathrm{b}}^{\ensuremath{-}1}$ of data recorded at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB ${e}^{+}{e}^{\ensuremath{-}}$ storage ring. The decay amplitudes for the different $\ensuremath{\varphi}{K}^{*0}$ helicity states are measured from the angular distributions of final state particles in the transversity basis. The longitudinal and transverse complex amplitudes are $|{A}_{0}{|}^{2}=0.43\ifmmode\pm\else\textpm\fi{}0.09\ifmmode\pm\else\textpm\fi{}0.04$, $|{A}_{\ensuremath{\perp}}{|}^{2}=0.41\ifmmode\pm\else\textpm\fi{}0.10\ifmmode\pm\else\textpm\fi{}0.04$, $\mathrm{arg} ({A}_{\ensuremath{\parallel}})=\ensuremath{-}2.57\ifmmode\pm\else\textpm\fi{}0.39\ifmmode\pm\else\textpm\fi{}0.09$, and $\mathrm{arg} ({A}_{\ensuremath{\perp}})=0.48\ifmmode\pm\else\textpm\fi{}0.32\ifmmode\pm\else\textpm\fi{}0.06$. The direct $CP$-violating asymmetries are found to be consistent with zero.

Published
2003

134. Upper bound on the decay tau--microgamma from the Belle detector

Author

K, Abe, T, Abe, I, Adachi, Byoung Sup, Ahn, H, Aihara, K, Akai, M, Akatsu, M, Akemoto, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, S, Banerjee, A, Bay, I, Bedny, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, M, Danilov, L Y, Dong, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, J, Flanagan, C, Fukunaga, K, Furukawa, N, Gabyshev, A, Garmash, T, Gershon, R, Guo, J, Haba, C, Hagner, F, Handa, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, W-S, Hou, H-C, Huang, T, Iijima, H, Ikeda, K, Inami, A, Ishikawa, R, Itoh, H, Iwasaki, M, Iwasaki, Y, Iwasaki, J H, Kang, J S, Kang, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, E, Kikutani, H J, Kim, J H, Kim, S K, Kim, K, Kinoshita, P, Koppenburg, S, Korpar, P, Krokovny, R, Kulasiri, A, Kuzmin, Y-J, Kwon, S H, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, D, Liventsev, F, Mandl, T, Matsumoto, A, Matyja, S, Michizono, T, Mimashi, W, Mitaroff, K, Miyabayashi, H, Miyata, D, Mohapatra, T, Mori, T, Nagamine, Y, Nagasaka, T T, Nakamura, E, Nakano, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, S, Ogawa, Y, Ogawa, K, Ohmi, Y, Ohnishi, T, Ohshima, N, Ohuchi, T, Okabe, S, Okuno, W, Ostrowicz, H, Ozaki, H, Palka, C W, Park, H, Park, N, Parslow, L E, Piilonen, N, Root, H, Sagawa, S, Saitoh, Y, Sakai, M, Satapathy, A, Satpathy, O, Schneider, J, Schümann, A J, Schwartz, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, T, Shidara, B, Shwartz, V, Sidorov, J B, Singh, N, Soni, S, Stanic, M, Staric, A, Sugi, K, Sumisawa, T, Sumiyoshi, S, Suzuki, S Y, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, M, Tawada, G N, Taylor, Y, Teramoto, T, Tomura, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, S, Uno, G, Varner, C C, Wang, C H, Wang, J G, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, Heyoung, Yang, M, Yoshida, Y, Yusa, Z P, Zhang, Y, Zheng, V, Zhilich, and D, Zontar

Abstract

We have performed a search for the lepton-flavor-violating decay tau--microgamma using a data sample of 86.3 fb(-1) accumulated by the Belle detector at KEK. No evidence for a signal is seen, and we set an upper limit for the branching fraction of B(tau--microgamma)3.1 x 10(-7) at the 90% confidence level.

Published
2003

135. Observation of B(+)--pppi+, B0--ppK0, and B(+)--ppK(*+)

Author

M-Z, Wang, K, Abe, T, Abe, I, Adachi, H, Aihara, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, A, Bay, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, M-C, Chang, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, P H, Chu, A, Chuvikov, M, Danilov, L Y, Dong, A, Drutskoy, S, Eidelman, V, Eiges, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, G, Gokhroo, B, Golob, T, Hara, H, Hayashii, M, Hazumi, T, Hokuue, Y, Hoshi, W-S, Hou, H-C, Huang, K, Inami, A, Ishikawa, R, Itoh, H, Iwasaki, M, Iwasaki, Y, Iwasaki, J H, Kang, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, H J, Kim, Hyunwoo, Kim, J H, Kim, S K, Kim, K, Kinoshita, P, Koppenburg, S, Korpar, P, Krizan, P, Krokovny, A, Kuzmin, Y-J, Kwon, J S, Lange, S H, Lee, T, Lesiak, A, Limosani, S-W, Lin, J, MacNaughton, G, Majumder, F, Mandl, T, Matsumoto, W, Mitaroff, H, Miyake, H, Miyata, T, Nagamine, Y, Nagasaka, E, Nakano, S, Nishida, O, Nitoh, S, Ogawa, T, Ohshima, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, N, Parslow, L E, Piilonen, M, Rozanska, H, Sagawa, S, Saitoh, Y, Sakai, T R, Sarangi, O, Schneider, A J, Schwartz, S, Semenov, H, Shibuya, V, Sidorov, J B, Singh, N, Soni, S, Stanic, M, Staric, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, S, Suzuki, S Y, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, Y, Teramoto, T, Tomura, T, Tsuboyama, T, Tsukamoto, S, Uehara, S, Uno, G, Varner, K E, Varvell, C H, Wang, J G, Wang, Y, Watanabe, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, J, Ying, Y, Yuan, Y, Yusa, C C, Zhang, Z P, Zhang, V, Zhilich, and D, Zontar

Abstract

We report the first observation of a b--u type charmless baryonic B decay, B+--pppi(+), as well as b--s type B0--ppK0 and B+--ppK(*+) decays. The analysis is based on a 78 fb(-1) data sample recorded on the Upsilon(4S) resonance with the Belle detector at KEKB. We find B(B+--pppi(+))=(3.06(+0.73)(-0.62)+/-0.37)x10(-6), B(B0--ppK0)=(1.88(+0.77)(-0.60)+/-0.23)x10(-6), and B(B+--ppK(*+))=(10.3(+3.6+1.3)(-2.8-1.7))x10(-6). We also update B(B+--ppK+)=(5.66(+0.67)(-0.57)+/-0.62)x10(-6) and present an upper limit on B(B0--ppK(*0)) at the 90% confidence level. A common feature of the observed decay modes is threshold peaking in baryon pair invariant mass.

Published
2003

136. Observation of B--K*l+l

Author

A, Ishikawa, K, Abe, T, Abe, I, Adachi, Byoung Sup, Ahn, H, Aihara, K, Akai, M, Akatsu, M, Akemoto, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, A, Bay, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, M, Danilov, L Y, Dong, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, J, Flanagan, C, Fukunaga, Y, Funakoshi, K, Furukawa, N, Gabyshev, A, Garmash, T, Gershon, B, Golob, R, Guo, J, Haba, C, Hagner, F, Handa, H, Hayashii, M, Hazumi, L, Hinz, T, Hokuue, Y, Hoshi, W-S, Hou, Y B, Hsiung, H-C, Huang, T, Iijima, K, Inami, R, Itoh, H, Iwasaki, M, Iwasaki, Y, Iwasaki, J H, Kang, J S, Kang, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, E, Kikutani, H J, Kim, Hyunwoo, Kim, J H, Kim, S K, Kim, K, Kinoshita, P, Koppenburg, S, Korpar, P, Krizan, P, Krokovny, A, Kuzmin, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, D, Liventsev, J, MacNaughton, G, Majumder, F, Mandl, M, Masuzawa, T, Matsumoto, A, Matyja, S, Michizono, T, Mimashi, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, D, Mohapatra, T, Mori, T, Nagamine, Y, Nagasaka, T, Nakadaira, T T, Nakamura, M, Nakao, H, Nakazawa, Z, Natkaniec, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, Y, Ogawa, K, Ohmi, Y, Ohnishi, T, Ohshima, N, Ohuchi, T, Okabe, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, H, Palka, C W, Park, H, Park, N, Parslow, L S, Peak, L E, Piilonen, N, Root, H, Sagawa, S, Saitoh, Y, Sakai, T R, Sarangi, M, Satapathy, A, Satpathy, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, T, Shidara, V, Sidorov, J B, Singh, N, Soni, S, Stanic, M, Staric, A, Sugi, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, S, Suzuki, S Y, Suzuki, S K, Swain, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, M, Tawada, G N, Taylor, Y, Teramoto, T, Tomura, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, S, Uno, G, Varner, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, Heyoung, Yang, J, Ying, M, Yoshida, Y, Yusa, Z P, Zhang, V, Zhilich, and D, Zontar

Abstract

We report the observation of the flavor-changing neutral current decay B--K(*)l(+)l(-) and an im-proved measurement of the decay B--Kl(+)l(-), where l represents an electron or a muon, with a data sample of 140 fb(-1) accumulated at the Upsilon(4S) resonance with the Belle detector at KEKB. The results for the branching fractions are B(B--K(*)l(+)l(-))=(11.5(+2.6)(-2.4)+/-0.8+/-0.2)x10(-7) and B(B--Kl(+)l(-))=(4.8(+1.0)(-0.9)+/-0.3+/-0.1)x10(-7), where the first error is statistical, the second is systematic and the third is from model dependence.

Published
2003

137. Measurement of branching fraction ratios andCPasymmetries inB±→DCPK±

Author

S. K. Swain, T. E. Browder, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, T. Aushev, S. Bahinipati, A. M. Bakich, Y. Ban, E. Banas, A. Bay, P. K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, B. C. K. Casey, M.-C. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, A. Garmash, T. Gershon, B. Golob, R. Guo, J. Haba, T. Hara, H. Hayashii, M. Hazumi, I. Higuchi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, H. J. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, K. Kinoshita, S. Kobayashi, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, J. S. Lange, G. Leder, S. H. Lee, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, F. Mandl, H. Matsumoto, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyata, J. Mueller, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, L. S. Peak, J.-P. Perroud, M. Peters, L. E. Piilonen, M. Rozanska, H. Sagawa, Y. Sakai, T. R. Sarangi, M. Satapathy, A. Satpathy, O. Schneider, J. Schümann, A. J. Schwartz, T. Seki, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, T. Shibata, H. Shibuya, B. Shwartz, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S. Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, S. E. Vahsen, G. Varner, K. E. Varvell, C. H. Wang, J. G. Wang, M. Watanabe, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, Heyoung Yang, Y. Yuan, Y. Yusa, C. C. Zhang, J. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, D. Žontar, and D. Zürcher

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Branching fraction, Resonance, Charge (physics)
Abstract

We report results on the decay $B^{-} \to D_{CP}K^{-}$ and its charge conjugate using a data sample of 85.4 million $B\bar{B}$ pairs recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric $e^{+}e^{-}$ storage ring. Ratios of branching fractions of Cabibbo-suppressed to Cabibbo-favored processes are determined to be ${\cal B}(B^- \to D^0 K^-)/{\cal B}(B^- \to D^0 \pi^-)= 0.077 \pm 0.005(stat) \pm 0.006(sys)$, ${\cal B}(B^- \to D_1 K^-)/{\cal B}(B^- \to D_1 \pi^-) = 0.093 \pm 0.018(stat) \pm 0.008(sys)$ and ${\cal B}(B^- \to D_2 K^-)/{\cal B}(B^- \to D_2 \pi^-) = 0.108 \pm 0.019(stat) \pm 0.007(sys)$ where the indices 1 and 2 represent the CP=+1 and CP=$-$1 eigenstates of the $D^{0}-\bar{D^{0}}$ system, respectively. We find the partial-rate charge asymmetries for $B^{-} \to D_{CP}K^{-}$ to be ${\cal{A}}_1 = 0.06 \pm 0.19(stat) \pm 0.04(sys)$ and ${\cal{A}}_2 = -0.19 \pm 0.17(stat) \pm 0.05(sys)$.

Published
2003

138. Observation of a narrow charmoniumlike state in exclusive B+/---K+/-pi+pi-J/psi decays

Author

S-K, Choi, S L, Olsen, K, Abe, T, Abe, I, Adachi, Byoung Sup, Ahn, H, Aihara, K, Akai, M, Akatsu, M, Akemoto, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, S, Banerjee, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, M, Danilov, L Y, Dong, A, Drutskoy, S, Eidelman, V, Eiges, J, Flanagan, C, Fukunaga, K, Furukawa, N, Gabyshev, T, Gershon, B, Golob, H, Guler, R, Guo, C, Hagner, F, Handa, T, Hara, N C, Hastings, H, Hayashii, M, Hazumi, L, Hinz, Y, Hoshi, W-S, Hou, Y B, Hsiung, H-C, Huang, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, M, Iwasaki, Y, Iwasaki, J H, Kang, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, E, Kikutani, H J, Kim, Hyunwoo, Kim, J H, Kim, S K, Kim, K, Kinoshita, H, Koiso, P, Koppenburg, S, Korpar, P, Krizan, P, Krokovny, S, Kumar, A, Kuzmin, J S, Lange, G, Leder, S H, Lee, T, Lesiak, S-W, Lin, D, Liventsev, J, MacNaughton, G, Majumder, F, Mandl, D, Marlow, T, Matsumoto, S, Michizono, T, Mimashi, W, Mitaroff, K, Miyabayashi, H, Miyake, D, Mohapatra, G R, Moloney, T, Nagamine, Y, Nagasaka, T, Nakadaira, T T, Nakamura, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, Y, Ogawa, K, Ohmi, Y, Ohnishi, T, Ohshima, N, Ohuchi, K, Oide, T, Okabe, S, Okuno, W, Ostrowicz, H, Ozaki, H, Palka, H, Park, N, Parslow, L E, Piilonen, H, Sagawa, S, Saitoh, Y, Sakai, T R, Sarangi, M, Satapathy, A, Satpathy, O, Schneider, A J, Schwartz, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, H, Shibuya, T, Shidara, B, Shwartz, V, Sidorov, N, Soni, S, Stanic, M, Staric, A, Sugiyama, T, Sumiyoshi, S, Suzuki, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, M, Tawada, G N, Taylor, Y, Teramoto, T, Tomura, K, Trabelsi, T, Tsukamoto, S, Uehara, K, Ueno, Y, Unno, S, Uno, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, H, Yanai, Heyoung, Yang, J, Ying, M, Yoshida, C C, Zhang, Z P, Zhang, and D, Zontar

Abstract

We report the observation of a narrow charmoniumlike state produced in the exclusive decay process B+/---K+/-pi(+)pi(-)J/psi. This state, which decays into pi(+)pi(-)J/psi, has a mass of 3872.0+/-0.6(stat)+/-0.5(syst) MeV, a value that is very near the M(D0)+M(D(*0)) mass threshold. The results are based on an analysis of 152M B-Bmacr; events collected at the Upsilon(4S) resonance in the Belle detector at the KEKB collider. The signal has a statistical significance that is in excess of 10sigma.

Published
2003

139. Measurement of time-dependent CP-violating asymmetries in B0--phiK(0)S, K+K-K0(S), and eta'K0(S) decays

Author

K, Abe, T, Abe, I, Adachi, H, Aihara, K, Akai, M, Akatsu, Y, Asano, T, Aso, T, Aushev, S, Bahinipati, A M, Bakich, Y, Ban, S, Banerjee, I, Bedny, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, J, Brodzicka, T E, Browder, M-C, Chang, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, M, Danilov, L Y, Dong, S, Eidelman, V, Eiges, Y, Enari, J, Flanagan, C, Fukunaga, K, Furukawa, N, Gabyshev, A, Garmash, T, Gershon, B, Golob, R, Guo, J, Haba, C, Hagner, K, Hara, T, Hara, N C, Hastings, H, Hayashii, M, Hazumi, I, Higuchi, T, Higuchi, T, Hokuue, Y, Hoshi, W-S, Hou, Y B, Hsiung, H-C, Huang, Y, Igarashi, T, Iijima, H, Ikeda, K, Inami, A, Ishikawa, H, Ishino, R, Itoh, H, Iwasaki, M, Iwasaki, Y, Iwasaki, T, Kamitani, J H, Kang, J S, Kang, P, Kapusta, S U, Kataoka, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, M, Kikuchi, E, Kikutani, H J, Kim, Hyunwoo, Kim, J H, Kim, S K, Kim, K, Kinoshita, H, Koiso, P, Koppenburg, S, Korpar, P, Krizan, P, Krokovny, S, Kumar, Y-J, Kwon, J S, Lange, G, Leder, S H, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, D, Liventsev, J, MacNaughton, F, Mandl, D, Marlow, M, Masuzawa, T, Matsumoto, A, Matyja, S, Michizono, T, Mimashi, W, Mitaroff, K, Miyabayashi, H, Miyake, H, Miyata, D, Mohapatra, T, Mori, A, Murakami, T, Nagamine, Y, Nagasaka, T, Nakadaira, T T, Nakamura, E, Nakano, M, Nakao, Z, Natkaniec, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, Y, Ogawa, K, Ohmi, Y, Ohnishi, T, Ohshima, N, Ohuchi, K, Oide, T, Okabe, S, Okuno, S L, Olsen, Y, Onuki, W, Ostrowicz, H, Ozaki, P, Pakhlov, H, Palka, C W, Park, H, Park, M, Peters, L E, Piilonen, N, Root, M, Rozanska, H, Sagawa, S, Saitoh, Y, Sakai, M, Satapathy, A, Satpathy, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, S, Semenov, K, Senyo, M E, Sevior, T, Shibata, H, Shibuya, T, Shidara, B, Shwartz, V, Sidorov, J B, Singh, N, Soni, S, Stanic, R, Sugahara, A, Sugi, T, Sugimura, A, Sugiyama, K, Sumisawa, T, Sumiyoshi, K, Suzuki, S, Suzuki, S Y, Suzuki, F, Takasaki, N, Tamura, J, Tanaka, M, Tanaka, M, Tawada, Y, Teramoto, T, Tomura, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K, Ueno, Y, Unno, S, Uno, Y, Ushiroda, S E, Vahsen, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, H, Yamamoto, N, Yamamoto, Y, Yamashita, M, Yamauchi, H, Yanai, Heyoung, Yang, J, Ying, M, Yokoyama, M, Yoshida, Y, Yuan, Y, Yusa, C C, Zhang, J, Zhang, Z P, Zhang, Y, Zheng, V, Zhilich, D, Zontar, and D, Zürcher

Abstract

We present an improved measurement of CP-violation parameters in B0--phiK(0)(S), K(+)K(-)K(0)(S), and eta(')K(0)(S) decays based on a 140 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. One neutral B meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters for each of the three modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays. We find that the observed CP asymmetry in the B--phiK(0)(S) decay differs from the standard model (SM) expectation by 3.5 standard deviations, while the other cases are consistent with the SM.

Published
2003

140. Observation of the D(sJ)(2317) and D(sJ)(2457) in B decays

Author

P, Krokovny, K, Abe, T, Abe, I, Adachi, H, Aihara, K, Akai, M, Akatsu, M, Akemoto, Y, Asano, T, Aso, T, Aushev, A M, Bakich, I, Bedny, P K, Behera, I, Bizjak, A, Bondar, M, Bracko, T E, Browder, B C K, Casey, Y, Chao, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, A, Chuvikov, L Y, Dong, J, Dragic, S, Eidelman, V, Eiges, Y, Enari, J, Flanagan, N, Gabyshev, A, Garmash, T, Gershon, B, Golob, R, Guo, C, Hagner, F, Handa, N C, Hastings, H, Hayashii, M, Hazumi, L, Hinz, T, Hokuue, Y, Hoshi, W-S, Hou, H-C, Huang, Y, Igarashi, H, Ikeda, A, Ishikawa, R, Itoh, H, Iwasaki, M, Iwasaki, H K, Jang, T, Kamitani, J H, Kang, N, Katayama, H, Kawai, T, Kawasaki, H, Kichimi, E, Kikutani, D W, Kim, H J, Kim, Hyunwoo, Kim, J H, Kim, K, Kinoshita, H, Koiso, P, Koppenburg, S, Korpar, P, Krizan, A, Kuzmin, Y-J, Kwon, J S, Lange, S H, Lee, T, Lesiak, A, Limosani, S-W, Lin, J, MacNaughton, G, Majumder, F, Mandl, M, Masuzawa, T, Matsumoto, S, Michizono, Y, Mikami, W, Mitaroff, H, Miyata, D, Mohapatra, G R, Moloney, T, Nagamine, Y, Nagasaka, T, Nakadaira, T T, Nakamura, E, Nakano, M, Nakao, H, Nakazawa, J W, Nam, Z, Natkaniec, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, Y, Ogawa, Y, Ohnishi, T, Ohshima, N, Ohuchi, K, Oide, T, Okabe, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, H, Palka, C W, Park, H, Park, K S, Park, N, Parslow, L E, Piilonen, N, Root, M, Rozanska, H, Sagawa, S, Saitoh, Y, Sakai, T R, Sarangi, A, Satpathy, O, Schneider, C, Schwanda, A J, Schwartz, S, Semenov, M E, Sevior, H, Shibuya, T, Shidara, V, Sidorov, J B, Singh, N, Soni, S, Stanic, A, Sugi, K, Sumisawa, T, Sumiyoshi, S, Suzuki, F, Takasaki, K, Tamai, N, Tamura, J, Tanaka, M, Tanaka, M, Tawada, Y, Teramoto, T, Tomura, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, K E, Varvell, C H, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, N, Yamamoto, Y, Yamashita, M, Yamauchi, H, Yanai, Y, Yuan, C C, Zhang, Z P, Zhang, V, Zhilich, and D, Zontar

Abstract

We report the first observation of the B--Dmacr;D(sJ)(2317) and B--Dmacr;D(sJ)(2457) decays based on 123.8x10(6) BBmacr; events collected with the Belle detector at KEKB. We observe the D(sJ)(2317) decay to D(s)pi(0) and the D(sJ)(2457) decay to the D(*)(s)pi(0) and D(s)gamma final states. We also set 90% C.L. upper limits for the decays D(sJ)(2317)--D(*)(s)gamma, D(sJ)(2457)--D(*)(s)gamma, D(sJ)(2457)--D(s)pi(0), and D(sJ)(2457)--D(s)pi(+)pi(-).

Published
2003

141. Improved measurement of the partial-rateCPasymmetry inB+→K0π+andB−→K0π−decays

Author

Y. Unno, K. Suzuki, K. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, Y. Ban, S. Banerjee, A. Bay, I. Bedny, P. K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, R. Guo, J. Haba, F. Handa, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, H. J. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, K. Kinoshita, S. Kobayashi, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, F. Mandl, D. Marlow, H. Matsumoto, T. Matsumoto, A. Matyja, W. Mitaroff, H. Miyake, H. Miyata, T. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, L. S. Peak, J.-P. Perroud, L. E. Piilonen, N. Root, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, A. J. Schwartz, T. Seki, S. Semenov, K. Senyo, M. E. Sevior, T. Shibata, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. K. Swain, T. Takahashi, F. Takasaki, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, G. Varner, K. E. Varvell, C. H. Wang, J. G. Wang, M.-Z. Wang, M. Watanabe, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, H. Yanai, Heyoung Yang, C. C. Zhang, J. Zhang, Z. P. Zhang, Y. Zheng, D. Žontar, and D. Zürcher

Subjects
Physics, Nuclear and High Energy Physics, Nuclear magnetic resonance, KEKB, media_common.quotation_subject, Resonance, Asymmetry, Storage ring, media_common
Abstract

We report an improved measurement of the partial-rate CP asymmetry in B±→K0π± decays. The analysis is based on a data sample of 85×106 BB pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e +e- storage ring. We measure ACP(K 0π±) = 0.07-0.08 +0.09 +0.03 +0.01, where the first and second errors are statistical and systematic, respectively; the corresponding 90% confidence-level interval is -0.10

Published
2003

142. Observation of B-/+--rho-/+rho0 decays

Author

J, Zhang, M, Nakao, K, Abe, T, Abe, I, Adachi, H, Aihara, M, Akatsu, Y, Asano, T, Aso, V, Aulchenko, T, Aushev, S, Bahinipati, A M, Bakich, Y, Ban, E, Banas, P K, Behera, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, B C K, Casey, P, Chang, Y, Chao, B G, Cheon, R, Chistov, S-K, Choi, Y, Choi, Y K, Choi, M, Danilov, L Y, Dong, J, Dragic, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, A, Gordon, R, Guo, F, Handa, T, Hara, N C, Hastings, H, Hayashii, M, Hazumi, L, Hinz, T, Hokuue, Y, Hoshi, W-S, Hou, Y B, Hsiung, H-C, Huang, Y, Igarashi, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, H, Iwasaki, M, Iwasaki, Y, Iwasaki, H K, Jang, J H, Kang, J S, Kang, S U, Kataoka, N, Katayama, H, Kawai, N, Kawamura, T, Kawasaki, D W, Kim, H J, Kim, Hyunwoo, Kim, J H, Kim, S K, Kim, K, Kinoshita, P, Koppenburg, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, S, Kumar, A, Kuzmin, Y-J, Kwon, G, Leder, S H, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, D, Liventsev, J, MacNaughton, G, Majumder, F, Mandl, D, Marlow, H, Matsumoto, T, Matsumoto, A, Matyja, W, Mitaroff, K, Miyabayashi, H, Miyata, D, Mohapatra, T, Mori, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, J W, Nam, Z, Natkaniec, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, H, Park, K S, Park, N, Parslow, J-P, Perroud, L E, Piilonen, M, Rozanska, H, Sagawa, S, Saitoh, Y, Sakai, T R, Sarangi, A, Satpathy, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, S, Semenov, K, Senyo, R, Seuster, M E, Sevior, T, Shibata, H, Shibuya, V, Sidorov, J B, Singh, S, Stanic, M, Staric, A, Sugi, K, Sumisawa, T, Sumiyoshi, S, Suzuki, S Y, Suzuki, S K, Swain, T, Takahashi, F, Takasaki, K, Tamai, N, Tamura, M, Tanaka, G N, Taylor, Y, Teramoto, T, Tomura, S N, Tovey, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, S, Uno, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, Heyoung, Yang, Y, Yusa, Z P, Zhang, Y, Zheng, V, Zhilich, D, Zontar, and D, Zürcher

Abstract

We report the first observation of the charmless vector-vector decay process B-/+--rho(-/+)rho(0). The measurement uses a 78 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric e(+)e(-) collider operating at the Upsilon(4S) resonance. We obtain a branching fraction of B(B-/+--rho(-/+)rho(0))=[31.7+/-7.1(stat)+3.8-6.7(syst)]x10(-6). An analysis of the rho helicity-angle distributions gives a longitudinal polarization fraction of Gamma(L)/Gamma=0.95+/-0.11(stat)+/-0.02(syst). We also measure the direct-CP-violating asymmetry A(CP)(B-/+--rho(-/+)rho(0))=0.00+/-0.22(stat)+/-0.03(syst).

Published
2003

143. Evidence for B--phiphiK

Author

H-C, Huang, K, Abe, T, Abe, I, Adachi, H, Aihara, M, Akatsu, T, Aso, V, Aulchenko, T, Aushev, A M, Bakich, Y, Ban, E, Banas, A, Bay, I, Bedny, P K, Behera, I, Bizjak, A, Bondar, A, Bozek, M, Bracko, T E, Browder, B C K, Casey, P, Chang, Y, Chao, K-F, Chen, B G, Cheon, R, Chistov, Y, Choi, Y K, Choi, M, Danilov, L Y, Dong, A, Drutskoy, S, Eidelman, V, Eiges, Y, Enari, C, Fukunaga, N, Gabyshev, A, Garmash, T, Gershon, B, Golob, R, Guo, J, Haba, F, Handa, T, Hara, N C, Hastings, H, Hayashii, M, Hazumi, L, Hinz, T, Hokuue, Y, Hoshi, W-S, Hou, Y B, Hsiung, Y, Igarashi, T, Iijima, K, Inami, A, Ishikawa, R, Itoh, Y, Iwasaki, H K, Jang, J H, Kang, J S, Kang, P, Kapusta, N, Katayama, H, Kawai, N, Kawamura, T, Kawasaki, H, Kichimi, D W, Kim, H J, Kim, Hyunwoo, Kim, J H, Kim, K, Kinoshita, P, Koppenburg, S, Korpar, P, Krizan, P, Krokovny, R, Kulasiri, S, Kumar, Y-J, Kwon, G, Leder, S H, Lee, T, Lesiak, J, Li, A, Limosani, S-W, Lin, D, Liventsev, J, MacNaughton, G, Majumder, F, Mandl, D, Marlow, H, Matsumoto, T, Matsumoto, W, Mitaroff, H, Miyata, G R, Moloney, T, Mori, T, Nagamine, Y, Nagasaka, T, Nakadaira, E, Nakano, M, Nakao, H, Nakazawa, J W, Nam, Z, Natkaniec, S, Nishida, O, Nitoh, T, Nozaki, S, Ogawa, T, Ohshima, T, Okabe, S, Okuno, S L, Olsen, W, Ostrowicz, H, Ozaki, H, Palka, C W, Park, H, Park, K S, Park, N, Parslow, J-P, Perroud, M, Peters, L E, Piilonen, M, Rozanska, H, Sagawa, S, Saitoh, Y, Sakai, T R, Sarangi, A, Satpathy, O, Schneider, J, Schümann, C, Schwanda, A J, Schwartz, T, Seki, S, Semenov, M E, Sevior, T, Shibata, H, Shibuya, V, Sidorov, J B, Singh, S, Stanic, M, Staric, A, Sugi, K, Sumisawa, T, Sumiyoshi, S, Suzuki, S Y, Suzuki, T, Takahashi, F, Takasaki, K, Tamai, N, Tamura, J, Tanaka, M, Tanaka, G N, Taylor, Y, Teramoto, T, Tomura, S N, Tovey, K, Trabelsi, T, Tsuboyama, T, Tsukamoto, S, Uehara, S, Uno, G, Varner, K E, Varvell, C C, Wang, C H, Wang, J G, Wang, M-Z, Wang, Y, Watanabe, E, Won, B D, Yabsley, Y, Yamada, A, Yamaguchi, Y, Yamashita, M, Yamauchi, H, Yanai, Heyoung, Yang, Y, Yusa, C C, Zhang, Z P, Zhang, Y, Zheng, V, Zhilich, and D, Zontar

Abstract

We report evidence for the decay mode B--phiphiK based on an analysis of 78 fb(-1) of data collected with the Belle detector at KEKB. This is the first example of a b--sssss transition. The branching fraction for this decay is measured to be B(B+/---phiphiK+/-)=(2.6(+1.1)(-0.9)+/-0.3)x10(-6) for a phiphi invariant mass below 2.85 GeV/c(2). Results for other related charmonium decay modes are also reported.

Published
2003

144. Observation ofB0→pΛ¯π−

Author

M.-Z. Wang, Y.-J. Lee, K. Abe, T. Abe, H. Aihara, M. Akatsu, Y. Asano, T. Aso, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, A. Bay, P. K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, B. C. K. Casey, M.-C. Chang, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Drutskoy, S. Eidelman, V. Eiges, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, R. Guo, C. Hagner, T. Hara, M. Hazumi, T. Hojo, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, D. W. Kim, H. J. Kim, J. H. Kim, K. Kinoshita, S. Kobayashi, P. Krokovny, A. Kuzmin, Y.-J. Kwon, S. H. Lee, J. Li, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, H. Miyata, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Park, K. S. Park, M. Peters, L. E. Piilonen, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, J. Schümann, A. J. Schwartz, S. Semenov, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, S. Stanič, M. Starič, A. Sugi, T. Sumiyoshi, S. Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, Y. Yamashita, M. Yamauchi, H. Yanai, P. Yeh, Z. P. Zhang, and D. Žontar

Subjects
Physics, Nuclear magnetic resonance, KEKB, Branching fraction, Electron–positron annihilation, Pi, General Physics and Astronomy, Resonance
Abstract

We report the first observation of the charmless hyperonic B decay, B0-->pLambda(pi)(-), using a 78 fb(-1) data sample recorded on the Upsilon(4S) resonance with the Belle detector at KEKB. The measured branching fraction is B(B0-->pLambda(pi)(-))=(3.97(+1.00)(-0.80)+/-0.56)x10(-6). Searches for B0-->pLambda(K)- and pSigma(0)pi(-) yield no significant signals and we set 90% confidence-level upper limits of B(B0-->pLambda(K)-) pSigma(0)pi(-))

Published
2003

145. Measurement of theB0−B0mixing rate withB0(B0)→D*∓π±partial reconstruction

Author

Y. Zheng, T. E. Browder, K. Abe, R. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, T. Aushev, A. M. Bakich, Y. Ban, A. Bay, P. K. Behera, A. Bondar, A. Bozek, M. Bračko, B. C. K. Casey, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, M. Danilov, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, C. Hagner, F. Handa, T. Hara, N. C. Hastings, K. Hasuko, M. Hazumi, E. M. Heenan, I. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, H.-C. Huang, Y. Igarashi, T. Iijima, K. Inami, H. Ishino, H. Iwasaki, M. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, S. U. Kataoka, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, K. Kinoshita, S. Kobayashi, S. Korpar, P. Krokovny, A. Kuzmin, Y.-J. Kwon, G. Leder, S. H. Lee, J. Li, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, S. Matsumoto, T. Matsumoto, W. Mitaroff, Y. Miyabayashi, H. Miyake, H. Miyata, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, C. W. Park, H. Park, K. S. Park, J.-P. Perroud, L. E. Piilonen, F. J. Ronga, K. Rybicki, H. Sagawa, Y. Sakai, T. R. Sarangi, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, R. Seuster, M. E. Sevior, H. Shibuya, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, M. Yokoyama, Y. Yuan, C. C. Zhang, Z. P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Resonance, Charge (physics), law.invention, KEKB, law, High Energy Physics::Experiment, Collider, Lepton, Bar (unit)
Abstract

We report a measurement of the $B^0-\bar{B}^0$ mixing parameter $\Delta m_d$ based on a $\rm 29.1~fb^{-1}$ sample of $\Upsilon (4S)$ resonance decays collected by the Belle detector at the KEKB asymmetric $e^+ e^-$ collider. We use events with a partially reconstructed $B^0(\bar{B}^0) \to D^{*\mp} \pi^{\pm}$ candidate and where the flavor of the accompanying $B$ meson is identified by the charge of the lepton from a $B^0(\bar{B}^0) \to X^{\mp} \ell^{\pm} \nu$ decay. The proper-time difference between the two $B$ mesons is determined from the distance between the two decay vertices. From a simultaneous fit to the proper-time distributions for the same-flavor ($B^0(\bar{B}^0)$, $\ell^{\pm}$) and opposite-flavor ($B^0(\bar{B}^0)$, $\ell^{\mp}$) event samples, we measure the mass difference between the two mass eigenstates of the neutral $B$ meson to be $\Delta m_d$= $(0.509 \pm 0.017~(\rm stat) \pm 0.020~(\rm syst))~ps^{-1}$.

Published
2003

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

Author

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

Subjects
General Physics and Astronomy
Published
2003

147. Studies of the DecayB±→DCPK±

Author

K. Abe, N. Abe, R. Abe, T. Abe, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, P. K. Behera, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, B. C. K. Casey, M.-C. Chang, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, H. Fujii, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, A. Gordon, R. Guo, J. Haba, T. Hara, Y. Harada, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. R. Hou, W.-S. Hou, S.-C. Hsu, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, N. Katayama, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, S. K. Kim, T. H. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, A. Limosani, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, K. Miyabayashi, Y. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, T. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, L. S. Peak, J.-P. Perroud, M. Peters, L. E. Piilonen, J. L. Rodriguez, F. J. Ronga, N. Root, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S. Y. Suzuki, S. K. Swain, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, S. N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, P. Yeh, Y. Yuan, Y. Yusa, J. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, and D. Žontar

Subjects
Physics, Particle decay, Particle physics, KEKB, Branching fraction, Electron–positron annihilation, Hadron, Analytical chemistry, Pi, General Physics and Astronomy, CP violation, B meson
Abstract

We report studies of the Cabibbo-suppressed decay B+/- --> DCPK+/-, where D-CP denotes CP eigenstates of the D-0 - (D) over bar (0) system. The analysis is based on a 29.1 fb(-1) sample collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric e(+)e(-) storage ring. We measure ratios of branching fractions, relative to Cabibbo-favored B+/--->D(CP)pi+/-, of B>(B- --> D1K-)/B(B- --> D(1)pi(-)) = 0.125 +/-0.036 +/- 0.010 and B(B- --> D2K-)/B(B- --> D(2)pi(-)) = 0.119 +/- 0.028 +/- 0.006; the index 1 (2) denotes the CP = +1 (-1) eigenstate. We also extract the partial rate asymmetries for B+/- --> DCPK+/-, finding A(1) = 0.29 +/- 0.26 +/- 0.05 and A(2) = -0.22 +/- 0.24 +/- 0.04.

Published
2003

148. Observation of the DecayB¯0→Λc+p¯

Author

N. Gabyshev, H. Kichimi, K. Abe, R. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, A. Bay, I. Bedny, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, M.-C. Chang, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, F. Fang, C. Fukunaga, A. Garmash, T. Gershon, B. Golob, J. Haba, C. Hagner, F. Handa, T. Hara, K. Hasuko, H. Hayashii, M. Hazumi, I. Higuchi, L. Hinz, T. Hojo, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, D. W. Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, K. Kinoshita, S. Kobayashi, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, S.-W. Lin, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, Y. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, L. S. Peak, J.-P. Perroud, L. E. Piilonen, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, J. Schümann, A. J. Schwartz, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, S. K. Swain, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, Y. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, and D. Žontar

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

We report the measurement of the charmed baryonic decay ${\overline{B}}^{0}\ensuremath{\rightarrow}{\ensuremath{\Lambda}}_{c}^{+}\overline{p}$ with a branching fraction of $({2.19}_{\ensuremath{-}0.49}^{+0.56}\ifmmode\pm\else\textpm\fi{}0.32\ifmmode\pm\else\textpm\fi{}0.57)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$ and a statistical significance of $5.8\text{ }\ensuremath{\sigma}$. The errors are statistical, systematic, and the error of the ${\ensuremath{\Lambda}}_{c}^{+}\ensuremath{\rightarrow}p{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decay branching fraction. This is the first observation of a two-body baryonic $B$ decay. The analysis is based on $78.2\text{ }{\mathrm{f}\mathrm{b}}^{\ensuremath{-}1}$ of data accumulated at the $\ensuremath{\Upsilon}(4S)$ resonance with the Belle detector at the KEKB asymmetric ${e}^{+}{e}^{\ensuremath{-}}$ collider.

Published
2003

149. Studies ofB0−B0mixing properties with inclusive dilepton events

Author

N. C. Hastings, K. Abe, R. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, A. Bay, I. Bedny, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, M.-C. Chang, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. W. Everton, F. Fang, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, J. Haba, C. Hagner, F. Handa, T. Hara, K. Hasuko, H. Hayashii, M. Hazumi, I. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, D. W. Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, K. Kinoshita, S. Kobayashi, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, S.-W. Lin, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, T. Matsuishi, S. Matsumoto, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, L. S. Peak, J.-P. Perroud, L. E. Piilonen, F. J. Ronga, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, T. R. Sarangi, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, J. Schümann, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, V. Sidorov, J. B. Singh, S. Stanič, M. Starič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, M. Yokoyama, Y. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, Y. Zheng, V. Zhilich, and D. Žontar

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, KEKB, Resonance, B meson, Measure (mathematics), Mixing (physics)
Abstract

We report a precise determination of the Z0-B0 mixing parameter Δmd based on the time evolution of same-sign and opposite-sign dilepton yields in Y(45) decays. Data were collected with the Belle detector at KEKB. Using data samples of 29.4 fb-1 recorded at the γ(4S) resonance and 3.0 fb-1 recorded at an energy 60 MeV below the resonance, we measure Δmd=[0.503±0.008(stat) ±0.010(syst)] ps-1. From the same analysis, we also measure the ratio of charged and neutral B meson production at the γ(4S), f +/f0= 1-01 ±0.03(stat)±0.09(syst), and CPT violation parameters in B0-B0 mixing, (cos θ)=0.00±0.12(stat) ±0.01(syst) and ℑ(cos θ)=0.03±0.01(stat)±0.03(syst). © 2003 The American Physical Society.

Published
2003

150. Study of time-dependentCP-violating asymmetries inb→sq¯qdecays

Author

K. Abe, T. Abe, I. Adachi, H. Aihara, K. Akai, M. Akatsu, M. Akemoto, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, A. Bay, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, B. C. K. Casey, P. Chang, Y. Chao, K.-F. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, K. Furukawa, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, A. Gordon, J. Haba, K. Hara, H. Hayashii, M. Hazumi, T. Higuchi, T. Hojo, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, H.-C. Huang, T. Igaki, Y. Igarashi, T. Iijima, H. Ikeda, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. Kaneko, J. H. Kang, J. S. Kang, N. Katayama, H. Kawai, Y. Kawakami, T. Kawasaki, H. Kichimi, M. Kikuchi, E. Kikutani, D. W. Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, J. H. Kim, S. Kobayashi, H. Koiso, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, Y.-J. Kwon, J. S. Lange, G. Leder, S. H. Lee, S.-W. Lin, D. Liventsev, J. MacNaughton, F. Mandl, D. Marlow, T. Matsuishi, S. Matsumoto, T. Matsumoto, S. Michizono, W. Mitaroff, K. Miyabayashi, Y. Miyabayashi, H. Miyake, H. Miyata, J. Mueller, T. Nagamine, Y. Nagasaka, T. Nakadaira, T. T. Nakamura, E. Nakano, M. Nakao, H. Nakazawa, J. W. Nam, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, Y. Ogawa, Y. Ohnishi, T. Ohshima, N. Ohuchi, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, H. Palka, C. W. Park, H. Park, J.-P. Perroud, L. E. Piilonen, M. Rozanska, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, A. Satpathy, O. Schneider, S. Schrenk, J. Schümann, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, T. Shidara, B. Shwartz, V. Sidorov, J. B. Singh, N. Soni, S. Stanič, M. Starič, A. Sugi, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, S. K. Swain, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, M. Tawada, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, T. Tsuboyama, T. Tsukamoto, S. Uehara, Y. Unno, S. Uno, Y. Ushiroda, S. E. Vahsen, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, M. Yokoyama, M. Yoshida, Y. Yuan, Y. Yusa, Z. P. Zhang, and D. Žontar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Elementary particle, Nuclear physics, Particle decay, KEKB, CP violation, High Energy Physics::Experiment, B meson
Abstract

We present a measurement of CP-violation parameters in the b→sqq penguin transitions (q = s,u,d) based on a 78 fb-1 data sample collected at the Y(4S) resonance with the Belle detector at the KEKB energyasymmetric e+e- collider. One neutral B meson is reconstructed in the φKS 0, K+K -KS 0, or η′ KS 0 decay channel, and the flavor of the accompanying B meson is identified from its decay products. CP violation parameters for each of the three modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays. © 2003 The American Physical Society.

Published
2003

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