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13 results on '"N., Ushida"'

1. Double-Λhypernuclei observed in a hybrid emulsion experiment

Author

A. K. Ichikawa, M. Sekimoto, M. Kawasaki, K. Hoshino, Seok Kim, Toshiyuki Takahashi, H. Kanda, Koji Yamamoto, B. Bassalleck, I. G. Park, N. Ushida, K. S. Sim, P. K. Saha, Kenichi Imai, C. S. Yoon, M. S. Chung, H. Okabe, H. N. Kyaw, D. Seki, T. Kouketsu, T. Wint, Hirotaka Takahashi, D.N. Tovee, Y. S. Ra, Junji Tojo, Y. Nagase, Fujio Takeutchi, J. Y. Kim, J. W C McNabb, A. Sawa, S. J. Kim, Saewoong Bahk, H. Shibuya, Tomokazu Fukuda, C. J. Yoon, H. M. Park, H. Akikawa, K. Oyama, Takayoshi Kawai, C. Nagoshi, N. Yasuda, Adam Rusek, Y. Kondo, M. Kaneko, J. K. Ahn, S. Ogawa, Y. Nakanishi, J. S. Song, Masaharu Ieiri, J. T. Yang, K. Miwa, K. Itonaga, D. H. Davis, L. H. Zhu, J. T. Rhee, H. Tanaka, Shigeki Aoki, K. Tanida, T. Tsunemi, Kazuma Nakazawa, K. T. Tint, C. O. Kim, Y. S. Iwata, B. D. Park, K. M. Baik, J. H. Chung, J. Parker, M. Mitsuhara, Tomoko Yoshida, Y. L. Lee, S. Torikai, M. Yosoi, Hiroyuki Noumi, H. Torii, K. Arai, Y. H. Iwata, A. A. Min, and M. Ukai

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Binding energy, Hyperon, Particle Data Group, Lambda
Abstract

A hybrid experiment with nuclear emulsion and scintillating-fiber detectors (KEK-E373) has been performed to search for double-strangeness systems. Among about 10${}^{3}$ events of ${\ensuremath{\Xi}}^{\ensuremath{-}}$ hyperons captured at rest by emulsion nuclei, we have observed four events which clearly show the topology of cascade weak decays of double-$\ensuremath{\Lambda}$ hypernuclei including the ``Nagara'' event. Regarding the Nagara event, values of the two-$\ensuremath{\Lambda}$ binding energy (${B}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}$) and the $\ensuremath{\Lambda}$-$\ensuremath{\Lambda}$ interaction energy ($\ensuremath{\Delta}{B}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}$) of ${}_{\ensuremath{\Lambda}}^{}{}_{\ensuremath{\Lambda}}^{6}\mathrm{He}$ have been revised to 6.91 $\ifmmode\pm\else\textpm\fi{}$ 0.16 and 0.67 $\ifmmode\pm\else\textpm\fi{}$ 0.17 MeV, respectively, due to the recent change of the ${\ensuremath{\Xi}}^{\ensuremath{-}}$ mass value (Particle Data Group). For another three events, we have determined possible species of double-$\ensuremath{\Lambda}$ hypernuclei together with their binding energies.

Published
2013
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2. Measurement of the relative branching fraction Γ(D0→Kμν)/Γ(D0→μX)

Author

K. Kodama, N. Ushida, A. Mokhtarani, V. S. Paolone, J. T. Volk, J. O. Wilcox, P. M. Yager, R. M. Edelstein, A. P. Freyberger, D. B. Gibaut, R. J. Lipton, W. R. Nichols, D. M. Potter, J. S. Russ, Y. Zhang, H. I. Jang, J. Y. Kim, I. T. Lim, M. Y. Pac, B. R. Baller, R. J. Stefanski, K. Nakazawa, S. Tasaka, Y. S. Choi, K. H. Chung, D. C. Kim, I. G. Park, J. S. Song, C. S. Yoon, M. Chikawa, T. Abe, T. Fujii, G. Fujioka, K. Fujiwara, H. Fukushima, T. Hara, Y. Takahashi, K. Taruma, Y. Tsuzuki, C. Yokoyama, S. D. Chang, B. G. Cheon, J. H. Cho, J. S. Kang, C. O. Kim, K. Y. Kim, T. Y. Kim, J. C. Lee, S. B. Lee, G. Y. Lim, S. W. Nam, T. S. Shin, K. S. Sim, J. K. Woo, Y. Isokane, Y. Tsuneoka, S. Aoki, A. Gauthier, K. Hoshino, H. Kitamura, M. Kobayashi, M. Miyanishi, K. Nakamura, M. Nakamura, Y. Nakamura, S. Nakanishi, K. Niu, K. Niwa, H. Tajima, J. M. Dunlea, S. G. Frederiksen, S. Kuramata, B. G. Lundberg, G. A. Oleynik, N. W. Reay, K. Reibel, R. A. Sidwell, N. R. Stanton, K. Moriyama, H. Shibata, T. S. Jaffery, G. R. Kalbfleisch, P. L. Skubic, J. M Snow, S. E. Willis, W. Y. Yuan, O. Kusumoto, T. Okusawa, M. Teranaka, T. Tominaga, T. Watanabe, J. Yamato, H. Okabe, J. Yokota, M. Adachi, M. Kazuno, F. Minakawa, E. Niu, H. Shibuya, S. Watanabe, O. Fukuda, Y. Sato, I. Tezuka, S. Y. Bahk, and S. K. Kim

Subjects
Semileptonic decay, Physics, Particle decay, Crystallography, Muon, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Mass spectrum, General Physics and Astronomy, Elementary particle
Abstract

The fraction {ital f} of {ital D}{sup 0} semimuonic decays which occur through the {ital K}{mu}{nu} mode has been measured in a hybrid emulsion spectrometer. Analysis of 124 semimuonic {ital D}{sup 0}-decay candidates gives {ital f}=0.32{plus minus}0.05 (stat) {plus minus}0.05 (syst). From this measurement and existing data on the {ital D}{sup 0} semileptonic branching ratio and lifetime, we obtain the branching ratio {ital R}({ital D}{sup 0}{r arrow}{ital K}{sup {minus}}{mu}{sup +}{nu})=(2.4{plus minus}0.4{plus minus}0.5)% and partial decay rate {Gamma}({ital D}{sup 0}{r arrow}{ital K}{sup {minus}}{mu}{sup +}{nu})=(5.6{plus minus}0.9{plus minus}1.2){times}10{sup 10} s{sup {minus}1}.

Published
1991
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3. Search for the H dibaryon in (K^{-},K^{+}) reactions

Author

Saewoong Bahk, I. Tezuka, Fujio Takeutchi, H. Funahashi, Yoshihiro Sato, J. S. Song, Yoshitaka Itow, Yuji Matsuda, H. Okabe, C.H. Hahn, T. Ishigami, Y. Maeda, T. Iijima, K. Imai, S. H. Chung, Ryuichi Takashima, Kimio Niwa, T. Watanabe, C. S. Yoon, S. Hirata, Kazuhiro Tanaka, H. Tajima, D. C. Kim, J. Y. Kim, S. Ono, Akira Masaike, T. Nakano, Masakazu Kobayashi, J. Yokota, K. Kodama, C. O. Kim, Masaharu Ieiri, H. Togawa, K. Hoshino, Koichi Kikuchi, H. M. Shimizu, Satoshi Watanabe, M. Teranaka, Yutaka Ueda, M. Nakamura, H. Shibuya, K. S. Chung, I. G. Park, M. Kazuno, N. Ushida, Shigeki Aoki, S. Nakanishi, C. Nagoshi, Kazuma Nakazawa, and T. Hara

Subjects
Baryon, Physics, Particle physics, Crystallography, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Hyperon, General Physics and Astronomy, Production (computer science), Elementary particle
Abstract

We have studied ({ital K}{sup {minus}},{ital K}{sup +}) reactions from an emulsion target. The {ital S}={minus}2 {ital H} dibaryon has been searched for by the analysis of the {ital K}{sup +} momentum spectrum together with emulsion data. No evidence of {ital H} production was observed in the mass range of 1.90--2.16 GeV/{ital c}{sup 2}. Upper limits for the production cross section of the {ital H} are (0.2--0.6)% of that for the quasifree {Xi}{sup {minus}} production at the 90% confidence level.

Published
1990
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4. Observation of aHΛΛ6eDouble Hypernucleus

Author

S. Torikai, J. Parker, M. Yosoi, J. H. Chung, N. Ushida, Hiroyuki Noumi, D.H. Davis, M. Mitsuhara, Tomoko Yoshida, Y. S. Iwata, Y. S. Ra, Fujio Takeutchi, Kazuma Nakazawa, Y. L. Lee, H. Torii, H. Shibuya, M. Sekimoto, K. S. Sim, C. O. Kim, Junji Tojo, Y. Nagase, K. M. Baik, Adam Rusek, H. Okabe, K. Oyama, S. J. Kim, Tomokazu Fukuda, Kazunuki Yamamoto, H. Akikawa, K. Imai, K. Arai, J. S. Song, J. K. Ahn, H. Tanaka, L. H. Zhu, T. Takahashi, B. Bassalleck, C. S. Yoon, T. Kouketsu, Shigeki Aoki, M. S. Chung, D.N. Tovee, Saewoong Bahk, Takayoshi Kawai, C. Nagoshi, Seok Kim, J. Y. Kim, J. W C McNabb, H. M. Park, N. Yasuda, K. Hoshino, H. Kanda, Masaharu Ieiri, K. Tanida, I. G. Park, Y. H. Iwata, Hirotaka Takahashi, J. T. Rhee, M. Kawasaki, M. Kaneko, S. Ogawa, P. K. Saha, D. Seki, C. J. Yoon, Y. Kondo, J. T. Yang, and A. K. Ichikawa

Subjects
Physics, Particle physics, Excited state, Hyperon, General Physics and Astronomy, Lambda, Hypernucleus
Abstract

A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of ${}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}^{6}\mathrm{He}$ emitted from a ${\ensuremath{\Xi}}^{\ensuremath{-}}$ hyperon nuclear capture at rest. The mass of ${}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}^{6}\mathrm{He}$ and the $\ensuremath{\Lambda}\ensuremath{-}\ensuremath{\Lambda}$ interaction energy $\ensuremath{\Delta}{B}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}$ have been measured for the first time devoid of the ambiguities due to the possibilities of excited states. The value of $\ensuremath{\Delta}{B}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}$ is $1.01\ifmmode\pm\else\textpm\fi{}{0.20}_{\ensuremath{-}0.11}^{+0.18}\phantom{\rule{0ex}{0ex}}\mathrm{MeV}$. This demonstrates that the $\ensuremath{\Lambda}\ensuremath{-}\ensuremath{\Lambda}$ interaction is weakly attractive.

Published
2001
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5. Lifetimes of the Charmed ParticlesD±,F±, andΛc+Produced by Neutrinos

Author

Jaebeom Park, R. A. Sidwell, K. Chiba, S. Conetti, M. Teranaka, M. Nakamura, Y. Maeda, I. A. Lovatt, Koji Nakazawa, D. Pitman, J. F. Martin, H. Shibuya, O. Kusumoto, G. Fujioka, M. Turcotte, K. Reibel, H. Fuchi, Yasuhiro Homma, Shigeki Tasaka, S. G. Frederiksen, K. Moriyama, N. R. Stanton, Y. Noguchi, C. Yokoyama, J. Trischuk, H. Okabe, J. Yamato, K. Hoshino, Motoaki Miyanishi, T. Hara, M. Gutzwiller, N. Ushida, K. Fujiwara, S. Tatsumi, M. Ohashi, C. O. Kim, S. Errede, J. M. Dunlea, Y. Takahashi, S. Kuramata, T. S. Yoon, J. Yokota, S. Y. Bahk, I. G. Park, H. Fukushima, N. W. Reay, T. Kondo, Y. Tsuzuki, C. J. D. Hébert, B. McLeod, J. S. Song, A. Gauthier, J.D. Prentice, K. Niu, Yasuhiro Tomita, Y. Yanagisawa, Kimio Niwa, H. Sasaki, D. C. Bailey, T. Okusawa, O. Yamakawa, R. Matsui, K. Taruma, P. Mercure, N. Torii, Gordon J. Aubrecht, Shigeki Aoki, K. Kodama, M. Kazuno, B. J. Stacey, J. Hebert, H. Shibata, and G. A. Oleynik

Subjects
Physics, Baryon, Meson, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Analytical chemistry, General Physics and Astronomy, Elementary particle, Fermion, Neutrino, Lambda, Boson
Abstract

We report final results for the D/sup + -/, F/sup + -/, and ..lambda../sub c//sup +/ lifetimes measured with a hybrid emulsion spectrometer in the wide-band neutrino beam at Fermilab. In total, 3886 neutrino and antineutrino interactions were located in the fiducial volume of the emulsion. From these interactions we have unambiguously identified 6 F/sup + -/ and 13 ..lambda../sub c//sup +/ decays, for which the fitted lifetimes are tau(F/sup + -/) = (2.6/sub -0.9//sup +1.6/) x 10/sup -13/ s and tau(..lambda../sub c//sup +/) = (2.0/sub -0.5//sup +0./ 7) x 10/sup -13/ s. 28 other decays are consistent with a D/sup +/ or D/sup -/ hypothesis. From these events, we obtain a D/sup + -/ lifetime of (11.1/sub -2.9//sup +4.4/) x 10/sup -13/ s.

Published
1986
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6. New Result for the Lifetime of theD0Meson

Author

R. A. Sidwell, H. Shibata, J. Fischer, Y. Maeda, H. Kimura, J. Hebert, N. Ushida, P. Sinervo, H. Shibuya, S. Conetti, Y. Takahashi, T. S. Yoon, David Bailey, Saewoong Bahk, K. Moriyama, S. Lokanathan, C. J. D. Hébert, K. Reibel, M. Teranaka, G. Fujioka, Jaebeom Park, S. Kuramata, K. Hoshino, J.D. Prentice, K. Niu, S. Errede, D. Pitman, J. F. Martin, T. Hara, M. Gutzwiller, T. Kondo, H. Okabe, H. Fukushima, J. S. Song, C. Yokoyama, B. McLeod, H. Fuchi, Y. Yanagisawa, P. Davis, O. Kusumoto, N. R. Stanton, Y. Noguchi, Yasuhiro Homma, J. Harnois, N. W. Reay, Shigeki Tasaka, C. O. Kim, J. Trischuk, Kimio Niwa, Motoaki Miyanishi, S. Tatsumi, J. Yokota, Y. Tsuzuki, and Ta Romanowski

Subjects
Semileptonic decay, Nuclear physics, Physics, Particle physics, Particle decay, Pion, Meson, Hadron, General Physics and Astronomy, Elementary particle, Neutrino, Fermi Gamma-ray Space Telescope
Abstract

In an experiment measuring charmed-particle lifetimes with a hybrid emulsion spectrometer, 1248 neutrino and antineutrino interactions produced by the wide-band beam at Fermi National Accelerator Laboratory have been located. Twenty-one candidates for the decay of neutral charmed particles are found. The lifetime for the D/sup 0/ based on the sixteen constrained events of this sample is measured to be 2.3/sup +0.8//sub -0.5/ x 10/sup -13/ sec.

Published
1982
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7. Measurement ofD+,F+, andΛc+Charmed-Particle Lifetimes

Author

Ta Romanowski, H. Shibata, P. Sinervo, P. Davis, K. Moriyama, Yasuhiro Homma, J. Fischer, Kimio Niwa, H. Fuchi, K. Hoshino, K. Reibel, D. Pitman, J. F. Martin, S. Kuramata, J. Yokota, S. Errede, Y. Tsuzuki, J. Hebert, Jaebeom Park, T. Hara, Y. Maeda, G. Fujioka, Y. Yanagisawa, J. S. Song, M. Teranaka, B. McLeod, C. Yokoyama, N. R. Stanton, S. Lokanathan, Y. Noguchi, H. Shibuya, Motoaki Miyanishi, S. Tatsumi, J. Harnois, M. Gutzwiller, S. Conetti, T. Kondo, N. W. Reay, H. Fukushima, R. A. Sidwell, J.D. Prentice, K. Niu, J. Trischuk, Saewoong Bahk, David Bailey, H. Okabe, H. Kimura, N. Ushida, Y. Takahashi, T. S. Yoon, C. J. D. Hébert, O. Kusumoto, Shigeki Tasaka, and C. O. Kim

Subjects
Semileptonic decay, Nuclear physics, Physics, Particle decay, Meson, Branching fraction, Hadron, General Physics and Astronomy, Elementary particle, Neutrino, Lambda
Abstract

From the analysis of 685 neutrino and antineutrino interactions in an emulsion target, fifteen candidates for the multiprong decay of charged charmed particles are found. This Letter presents liketimes for the D/sup + -/, F/sup + -/, and ..lambda../sub c//sup +/ states based on the fitted events of the sample.

Published
1980
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8. New Results for the Lifetimes of theD±,F±, andΛc+Particles

Author

D. Pitman, J. F. Martin, Y. Maeda, J. Yokota, S. Errede, Y. Tsuzuki, H. Fuchi, B. McLeod, Saewoong Bahk, H. Fukushima, J. S. Song, O. Kusumoto, Shigeki Tasaka, M. Teranaka, Ta Romanowski, Motoaki Miyanishi, S. Tatsumi, H. Okabe, C. O. Kim, Kimio Niwa, P. Sinervo, R. A. Sidwell, K. Reibel, T. Hara, Jaebeom Park, Y. Takahashi, T. S. Yoon, M. Gutzwiller, H. Kimura, N. Ushida, N. R. Stanton, J. Trischuk, Y. Noguchi, S. Lokanathan, J. Harnois, P. Davis, K. Hoshino, C. J. D. Hébert, Yasuhiro Homma, S. Conetti, H. Shibuya, K. Moriyama, G. Fujioka, T. Kondo, C. Yokoyama, J. Hebert, S. Kuramata, J.D. Prentice, Y. Yanagisawa, K. Niu, David Bailey, H. Shibata, N. W. Reay, and J. Fischer

Subjects
Nuclear physics, Physics, Particle decay, Pion, Meson, Hadron, Hyperon, General Physics and Astronomy, Elementary particle, Neutrino, Nucleon
Abstract

In an experiment measuring charmed-particle lifetimes with use of a hybrid-emulsion spectrometer in the wide-band neutrino beam at the Fermi National Accelerator Laboratory, 1248 neutrino and antineutrino interactions have been located. Twenty-three charged charm decay candidates have been reconstructed, from which we determine the lifetime of the D/sup + -/ to be 11.5/sub -3.5//sup +7.5/ x 10/sup -13/ s, that of the F/sup + -/ to be 1.9/sub -0.7//sup +1.3/ x 10/sup -13/ s, and that of the ..lambda../sub c//sup +/ to be 2.3/sub -0.6//sup +1.0/ x 10/sup -13/ s.

Published
1983
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9. Analysis of proton-nucleus and helium-nucleus collisions at energies greater than 10 TeV

Author

H. Kimura, S. Kuramata, V. D. Hopper, Y. Maeda, Y. K. Lim, H. Shibuya, Kimio Niwa, K. Niu, N. Ushida, K. Hoshino, H. Fuchi, Y. Yanagisawa, Shigeki Tasaka, and Yoshihiro Sato

Subjects
Physics, Nuclear reaction, Particle physics, Astrophysics::High Energy Astrophysical Phenomena, Alpha particle, Central region, Electromagnetic radiation, Synthetic materials, Nuclear physics, medicine.anatomical_structure, medicine, High Energy Physics::Experiment, Multiplicity (chemistry), Nuclear Experiment, Nucleon, Nucleus
Abstract

We have studied the characteristics of inclusive ..gamma..-ray and charged-meson production in proton-lucite collisions at 20 TeV, and helium-lucite collisions at 7 TeV per nucleon. Characteristics of multiple-production phenomena in these energy regions were fully analyzed and compared with those observed in lower-energy regions. The main results are as follows. (1) A substantial increase of charged secondaries in proton-lucite collisions is observed in the central region as the primary energy increases from 400 GeV to 19 TeV. (2) The average multiplicity in helium-lucite collisions is nearly twice as large as that in proton-lucite collisions at the same energy per nucleon. (3) While no difference is observed of the average values of P/sub T/ and P/sub T/ /sup 2/ for P/sub T/ 1.0 GeV/c) substantially increases above 10 TeV. (4) The fractional-energy distribution of ..gamma.. rays in the range of 0.10.1.

Published
1982
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10. Lifetime ofD0Charmed Mesons Produced in Neutrino Interactions

Author

J.D. Prentice, Y. Maeda, S. G. Frederiksen, K. Chiba, J. Yamato, T. Okusawa, H. Shibuya, D. Pitman, Y. Noguchi, K. Fujiwara, H. Fukushima, P. Mercure, K. Niu, Yasuhiro Homma, Shigeki Tasaka, T. Kondo, C. O. Kim, N. Ushida, Kimio Niwa, G. Fujioka, Shigeki Aoki, Mitsuhiro Nakamura, T. Hara, M. Kazuno, K. Kodama, K. Moriyama, O. Kusumoto, C. Yokoyama, Motoaki Miyanishi, J. S. Song, S. Tatsumi, K. Taruma, R. A. Sidwell, H. Fuchi, K. Hoshino, S. Kuramata, N. Torii, O. Yamakawa, H. Shibata, G. A. Oleynik, A. Gauthier, Y. Takahashi, T. S. Yoon, C. J. D. Hébert, N. W. Reay, S. Errede, Y. Yanagisawa, B. J. Stacey, J. M. Dunlea, D. C. Bailey, Kazuhiro Nakazawa, J. Yokota, Jaebeom Park, M. Gutzwiller, J. F. Martin, J. Hebert, Y. Tsuzuki, B. McLeod, M. Turcotte, K. Reibel, N. R. Stanton, M. Teranaka, S. Y. Bahk, I. G. Park, Y. Tomita, J. Trischuk, I. A. Lovatt, S. Conetti, H. Okabe, M. Ohashi, H. Sasaki, R. Matsui, and Gordon J. Aubrecht

Subjects
Nuclear physics, Physics, Particle physics, Meson, Hadron, General Physics and Astronomy, Elementary particle, Fermilab, Neutrino, Neutrino beam, Boson
Abstract

We report final results for the ${D}^{0}$ lifetime measured with a hybrid emulsion spectrometer in the wide-band neutrino beam at Fermilab. In a total of 3886 neutrino and antineutrino interactions located in the emulsion fiducial volume, we have found 58 ${D}^{0}$ decays, from which we determine the lifetime to be (${4.3}_{\ensuremath{-}0.5\ensuremath{-}0.2}^{+0.7+0.1}$) \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}13}$ s.

Published
1986
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11. Limits toνμ,νe→ντOscillations andνμ,νe→τ−Direct Coupling

Author

K. Moriyama, J. M. Dunlea, Shigeki Aoki, K. Taruma, J. Yokota, D. Pitman, J. F. Martin, Jaebeom Park, I. A. Lovatt, Y. Takahashi, B. J. Stacey, B. McLeod, Y. Tsuzuki, David Bailey, H. Sasaki, T. S. Yoon, N. W. Reay, A. Gauthier, J.D. Prentice, K. Niu, H. Okabe, Y. Maeda, T. Okusawa, Kimio Niwa, M. Ohashi, M. Teranaka, S. Errede, H. Shibuya, R. A. Sidwell, R. Matsui, M. Gutzwiller, J. Trischuk, P. Mercure, M. Kazuno, K. Hoshino, T. Kondo, S. Conetti, K. Chiba, J. Yamato, N. Ushida, Saewoong Bahk, O. Kusumoto, J. Hebert, Motoaki Miyanishi, S. G. Frederiksen, S. Tatsumi, Shigeki Tasaka, M. Nakamura, K. Kodama, Yasuhiro Tomita, Yasuhiro Homma, H. Shibata, G. A. Oleynik, G. Fujioka, Katsuaki Fujiwara, H. Fuchi, C. Yokoyama, I. G. Park, C. O. Kim, O. Yamakawa, N. Torii, C. J. D. Hébert, M. Turcotte, S. Kuramata, Y. Yanagisawa, N. R. Stanton, Y. Noguchi, H. Fukushima, Gordon J. Aubrecht, J. S. Song, Koji Nakazawa, K. Reibel, and T. Hara

Subjects
General Physics and Astronomy
Published
1986
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12. Measurement of theD0Lifetime

Author

C. J. D. Hébert, S. Errede, S. Kuramata, Motoaki Miyanishi, S. Conetti, K. Hoshino, M. Gutzwiller, D. Pitman, J. F. Martin, Y. Yanagisawa, T. Kondo, Y. Maeda, Jaebeom Park, S. Tatsumi, J. S. Song, Ta Romanowski, O. Kusumoto, Shigeki Tasaka, P. Davis, Y. Takahashi, B. McLeod, R. A. Sidwell, T. S. Yoon, C. O. Kim, N. R. Stanton, K. Reibel, Yasuhiro Homma, T. Hara, K. Moriyama, Y. Noguchi, Saewoong Bahk, H. Kimura, David Bailey, N. Ushida, Kimio Niwa, P. Sinervo, H. Okabe, G. Fujioka, C. Yokoyama, H. Shibuya, H. Fukushima, J. Yokota, Y. Tsuzuki, N. W. Reay, J.D. Prentice, K. Niu, J. Harnois, H. Fuchi, J. Hebert, S. Lokanathan, M. Teranaka, H. Shibata, J. Fischer, and J. Trischuk

Subjects
Nuclear physics, Physics, Particle physics, Particle decay, Spectrometer, Meson, Hadron, General Physics and Astronomy, Elementary particle, Neutrino, Particle identification, Fermi Gamma-ray Space Telescope
Abstract

In an experiment measuring charmed-particle lifetimes with a hybrid emulsion spectrometer, 685 neutrino and antineutrino interactions produced by the wide-band beam at Fermi National Accelerator Laboratory have been located. These events have been carefully searched for visible decays. This letter reports the seven neutral decays which are consistent with a D/sup 0/ hypothesis and determine a lifetime of 1.00/sup +0.52//sub -0.31/ x 10/sup -3/ sec for this charmed state.

Published
1980
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13. Upper Limits toνμ−ντOscillation andνμ−τCoupling

Author

J. Yokota, C. J. D. Hébert, M. Gutzwiller, B. McLeod, S. Errede, Y. Tsuzuki, S. Conetti, Y. Maeda, D. Pitman, J. F. Martin, P. Sinervo, K. Reibel, T. Hara, Kimio Niwa, J. S. Song, N. R. Stanton, K. Hoshino, Y. Noguchi, G. Fujioka, H. Shibuya, Y. Takahashi, C. Yokoyama, T. S. Yoon, P. Davis, Motoaki Miyanishi, S. Tatsumi, Yasuhiro Homma, J. Trischuk, Jaebeom Park, T. Kondo, S. Lokanathan, Saewoong Bahk, K. Moriyama, J. Hebert, R. A. Sidwell, Ta Romanowski, H. Okabe, H. Shibata, J. Fischer, H. Fukushima, David Bailey, O. Kusumoto, Shigeki Tasaka, C. O. Kim, J. Harnois, J.D. Prentice, K. Niu, H. Fuchi, H. Kimura, N. Ushida, N. W. Reay, M. Teranaka, S. Kuramata, and Y. Yanagisawa

Subjects
General Physics and Astronomy
Published
1981
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