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1. SEARCH FOR CHARGED HEAVY LEPTONS WITH ARBITRARY NEUTRINO MASSES IN e+e− ANNIHILATIONS AT $\sqrt{s} = 50 - 60.8~{\rm GeV}$

Author

Richard Breedon, M. H. Ye, Hiroyuki Sagawa, H. Miyata, J. Vinson, S. Lusin, W. Metcalf, K. Gotow, C. G. Trahern, T. Kumita, David Stuart, Takashi Sasaki, H. S. Budd, Kazuo Abe, C. Rosenfeld, Y. C. Zhu, S. L. Olsen, A. Sill, D. Perticone, F. Sannes, Y. Fujii, J. S. Kang, Y. Sugimoto, T. Mori, R. R. McNeil, Kaori Maeshima, K. Ohta, K. P. Hu, Winston Ko, K. Ueno, F. Kajino, Yasuo Higashi, M. H. Lee, R. Tanaka, E. J. Kim, E. H. Thorndike, J. Lim, G. N. Kim, S. Kobayashi, Robert Stone, J. Li, D. Blanis, Y. Sakai, Y. H. Ho, S.K. Kim, N. M. Shaw, Tsunehiko Omori, P. Gu, I. H. Park, S. Matsumoto, J. Liu, T. Nozaki, R. L. Malchow, P. Auchincloss, K. L. Sterner, Bj Kim, R. L. Imlay, D. H. Han, Yongsun Kim, J. Rowe, T. Ishizuka, R. D. Kass, K. Tomioka, A. Maki, C. P. Cheng, A. Bodek, C. A. Fry, S. S. Myung, H. W. Zheng, R. C. Walker, A. Bacala, Steve Schnetzer, H. Harada, Y. Takaiwa, Dong-Chul Son, H. Kagan, C. Velissaris, M. E. Mattson, A. Abashian, Y. Ishi, Yoshimasa Kurihara, E. H. Low, S. Wilson, P. N. Kirk, R. L. Lander, Y. Yamashita, Y. K. Li, A. Murakami, M. Frautschi, R. Poling, Kazumasa Miyano, Sarah Catherine Eno, Susumu Terada, T. Thomas, A. T.M. Wang, J. R. Smith, Hyunyong Kim, and L. E. Piilonen

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Phenomenology, Hadron, Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Massless particle, Nuclear physics, Pair production, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Lepton
Abstract

Results of a search for the pair production of charged heavy leptons in e+e− annihilations over the center-of-mass energy range of 50 to 60.8 GeV are reported. We assume that the leptons are of the sequential type but have allowed for the case where the associated neutrino might be massive. Separate searches for evidence for decays to hadronic and leptonic final states, searches specialized for the case where the charged lepton and its associated neutrino are close in mass, and a search for stable heavy leptons have uncovered no evidence for the production of such particles at these energies. Mass limits for heavy leptons and their associated neutrinos are determined for a range of hadronic and leptonic decay branching fractions. A sequential charged heavy lepton with mass between 12.6 and 29.6 GeV/c2 and with massless neutrino is excluded at the 95% confidence level.

Published
1991

2. Measurements ofRfore+e−annihilation at the KEK collider TRISTAN

Author

M. Frautschi, Y. Sakai, M. H. Ye, Y. Fujii, Hiroyuki Sagawa, Y. K. Li, D. H. Han, E. H. Thorndike, T. Mori, D. Perticone, J. Lim, R. Poling, Y. Sugimoto, J. Li, A. Bacala, Yoshimasa Kurihara, W. Metcalf, Robert Stone, Rr Mcneil, T. Nozaki, J. S. Kang, L. E. Piilonen, E. H. Low, E. J. Kim, C. G. Trahern, A. Murakami, H. S. Budd, Takashi Sasaki, T. Kumita, S. K. Kim, R. C. Walker, Steve Schnetzer, K. Ueno, A. Abashian, F. Sannes, Kazuo Abe, G. N. Kim, Kaori Maeshima, K. P. Hu, C. P. Cheng, Y. Yamagishi, R. L. Malchow, F. Kajino, R. Tanaka, C. A. Fry, Yongsun Kim, P. Gu, R. L. Lander, T. Kojima, A. Sill, H. Kagan, R. Imlay, R. D. Kass, M. H. Lee, T. Yasuda, K. Ohta, Winston Ko, N. M. Shaw, A. Maki, Richard Breedon, K. Gotow, Kazumasa Miyano, S. Kobayashi, David Stuart, S. Lusin, S. Matsumoto, Y. H. Ho, D. Blanis, S. Wilson, Y. Takaiwa, J. Vinson, A. Bodek, Hyunyong Kim, Dong-Chul Son, Sarah Catherine Eno, I. H. Park, Susumu Terada, J. Liu, Yusuke Higashi, Y. C. Zhu, K. L. Sterner, H. Harada, S. L. Olsen, T. Ishizuka, P. Auchincloss, S. S. Myung, H. W. Zheng, T. Thomas, M. E. Mattson, Y. Ishi, P. N. Kirk, Y. Yamashita, A. T.M. Wang, J. R. Smith, Tsunehiko Omori, C. Rosenfeld, and H. Miyata

Subjects
Nuclear physics, Physics, Particle physics, Antiparticle, Muon, Annihilation, Pair production, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Antimatter, Electron–positron annihilation, Hadron, Elementary particle
Abstract

The ratio {ital R} of the total cross section for {ital e}{sup +}{ital e}{sup {minus}} annihilation into hadrons to the lowest-order QED cross section for {ital e}{sup +}{ital e}{sup {minus}}{r arrow}{mu}{sup +}{mu}{sup {minus}} has been measured for center-of-mass energies ranging from 50 to 61.4 GeV. If we allow for an overall shift of {minus}4.9%, about 1.5 times our estimated normalization error, the results are consistent with the standard-model predictions.

Published
1990

3. Multihadron-event properties ine+e−annihilation ats=52−57GeV

Author

R. Tanaka, M. Frautschi, H. Miyata, A. Abashian, Takashi Sasaki, J. Li, M. H. Lee, L. E. Piilonen, Y. Sakai, W. Metcalf, H. Kagan, N. M. Shaw, T. Mori, I. H. Park, R. R. McNeil, P. Auchincloss, J. Liu, S. Wilson, R. L. Imlay, T. Ishizuka, S. Lusin, D. Perticone, Hiroyuki Sagawa, C. A. Fry, S. Matsumoto, Kazumasa Miyano, J. S. Kang, A. Bodek, T. Kojima, C. P. Cheng, T. Yasuda, Y. Takaiwa, K. Ueno, E. H. Low, Yasuhiro Sugimoto, Tsunehiko Omori, R. C. Walker, S. Kobayashi, F. Sannes, A. Maki, K. Gotow, Y. Fujii, Steve Schnetzer, C. G. Trahern, Dong-Chul Son, Kazuo Abe, T. Kumita, Robert Stone, T. Nozaki, K. P. Hu, Hyunyong Kim, Richard Breedon, H. S. Budd, G. N. Kim, S. S. Myung, H. W. Zheng, Sarah Catherine Eno, Susumu Terada, R. L. Lander, Kaori Maeshima, J. Vinson, E. J. Kim, Y. Yamagishi, M. H. Ye, H. Harada, Yoshimasa Kurihara, J. R. Smith, T. Thomas, D. H. Han, Yusuke Higashi, Y. K. Li, A. Murakami, R. Poling, M. E. Mattson, A. Sill, A. T.M. Wang, K. Ohta, Winston Ko, Y. Ishi, P. N. Kirk, Y. H. Ho, Y. Yamashita, D. Blanis, A. Bacala, K. L. Sterner, S. K. Kim, R. L. Malchow, F. Kajino, Yongsun Kim, R. D. Kass, E. H. Thorndike, J. Lim, P. Gu, David Stuart, Y. C. Zhu, S. L. Olsen, and C. Rosenfeld

Subjects
Quantum chromodynamics, Astroparticle physics, Physics, Particle physics, Annihilation, High Energy Physics::Phenomenology, Hadron, High Energy Physics::Experiment, Parton, Elementary particle, Quantum field theory, Nuclear Experiment, Hadronization
Abstract

We present the general properties of multihadron final states produced by {ital e}{sup +}{ital e}{sup {minus}} annihilation at center-of-mass energies from 52 to 57 GeV in the AMY detector at the KEK collider TRISTAN. Global shape, inclusive charged-particle, and particle-flow distributions are presented. Our measurements are compared with QCD+fragmentation models that use either leading-logarithmic parton-shower evolution or QCD matrix elements at the parton level, and either string or cluster fragmentation for hadronization.

Published
1990

4. Forward-backward charge asymmetry ine+e−→hadron jets

Author

D. Stuart, R. E. Breedon, G. N. Kim, Winston Ko, R. L. Lander, K. Maeshima, R. L. Malchow, J. R. Smith, R. Imlay, P. Kirk, J. Lim, R. R. McNeil, W. Metcalf, S. S. Myung, C. P. Cheng, P. Gu, J. Li, Y. K. Li, M. H. Ye, Y. C. Zhu, A. Abashian, K. Gotow, K. P. Hu, E. H. Low, M. E. Mattson, L. Piilonen, K. L. Sterner, S. Lusin, C. Rosenfeld, A. T. M. Wang, S. Wilson, M. Frautschi, H. Kagan, R. Kass, C. G. Trahern, K. Abe, Y. Fujii, Y. Higashi, S. K. Kim, Y. Kurihara, A. Maki, T. Nozaki, T. Omori, H. Sagawa, Y. Sakai, Y. Sugimoto, Y. Takaiwa, S. Terada, R. Walker, F. Kajino, D. Perticone, R. Poling, T. Thomas, Y. Ishi, K. Miyano, H. Miyata, T. Sasaki, Y. Yamashita, A. Bacala, J. Liu, I. H. Park, F. Sannes, S. Schnetzer, R. Stone, J. Vinson, P. Auchincloss, D. Blanis, A. Bodek, H. Budd, S. Eno, C. A. Fry, H. Harada, Y. H. Ho, Y. K. Kim, T. Kumita, T. Mori, S. L. Olsen, N. M. Shaw, A. Sill, E. H. Thorndike, K. Ueno, H. W. Zheng, S. Kobayashi, A. Murakami, J. S. Kang, H. J. Kim, M. H. Lee, D. H. Han, E. J. Kim, D. Son, T. Kojima, S. Matsumoto, R. Tanaka, Y. Yamagishi, T. Yasuda, T. Ishizuka, and K. Ohta (The AMY Collaboration)

Subjects
Quark, Physics, Particle physics, Annihilation, High Energy Physics::Lattice, Computer Science::Information Retrieval, media_common.quotation_subject, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Elementary particle, Charge (physics), Asymmetry, Standard Model, Nuclear physics, High Energy Physics::Experiment, Production (computer science), media_common
Abstract

The forward-backward asymmetry of quarks produced in {ital e}{sup +}{ital e}{sup {minus}} annihilations, summed over all flavors, is measured at {radical}{ital s} between 50 and 60.8 GeV. Methods of determining the charge direction of jet pairs are discussed. The asymmetry is found to agree with the five-flavor standard model.

Published
1990

5. Measurement of e^{+}e^{-}→bb¯ forward-backward charge asymmetry between √s =52 and 57 GeV

Author

C. Rosenfeld, Yasuhiro Sugimoto, Z. P. Mao, M. H. Lee, Takashi Sasaki, S. Wilson, David Stuart, A. Bacala, D. H. Han, G. N. Kim, Robert Stone, H. Harada, K. Gotow, Y. Fujii, S. Matsumoto, D. Blanis, A. Bodek, L. E. Piilonen, J. Li, Y. C. Zhu, S. L. Olsen, H. Kozuka, J. Vinson, K. Toyoshima, P. Perez, H. Kagan, H. W. Zheng, Y. T. Xu, N. M. Shaw, Steve Schnetzer, T. Nozaki, Y. Ishi, Y. K. Li, A. Murakami, R. L. Imlay, E. H. Thorndike, J. Lim, M. E. Mattson, S. S. Myung, Kazuo Abe, K. Ueno, R. Poling, C. P. Cheng, E. J. Kim, P. N. Kirk, P. Gu, K. Ohta, Winston Ko, Dong-Chul Son, Ryuki Tanaka, Kaori Maeshima, Y. Takaiwa, K. L. Sterner, Kazumasa Miyano, K. Sparks, Y. H. Ho, Y. Yamashita, R. L. Malchow, Yongsun Kim, R. D. Kass, Sarah Catherine Eno, Susumu Terada, Yoshimasa Kurihara, Hiroyuki Sagawa, A. Maki, E. H. Low, Alan Sill, H. S. Budd, T. L.T. Thomas, Yusuke Higashi, R. L. Lander, M. Frautschi, Hyunyong Kim, J. R. Smith, A. Abashian, M. C.S. Williams, R. R. McNeil, S. K. Kim, H. Ichinose, F. Kajino, A. T.M. Wang, C. A. Fry, H. Itoh, J. S. Kang, Hideo Yokota, S. Kobayashi, I. H. Park, T. Ishizuka, H. Miyata, Y. Sakai, S. Lusin, D. Perticone, Tsunehiko Omori, T. Mori, C. G. Trahern, T. Kumita, T. Takeda, W. Metcalf, F. Sannes, and K. P. Hu

Subjects
Physics, Particle physics, Annihilation, Pair production, Electron–positron annihilation, Hadron, General Physics and Astronomy, Production (computer science), Charge (physics), Bottom quark, Energy (signal processing)
Abstract

Using 123 multihadronic inclusive muon-production ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilation events at an average c.m. energy of 55.2 GeV, we extracted the forward-backward charge asymmetry of the ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}bb\ifmmode\bar\else\textasciimacron\fi{} process and the R ratio for bb\ifmmode\bar\else\textasciimacron\fi{} production. We used an analysis method in which the behavior of the c quark and lighter quarks is assumed, with only that of the b quark left indeterminate. The results, ${A}_{b}$=-0.72\ifmmode\pm\else\textpm\fi{}0.28(stat)\ifmmode\pm\else\textpm\fi{}0.13(syst) and ${R}_{b}$=0.57\ifmmode\pm\else\textpm\fi{}0.16\ifmmode\pm\else\textpm\fi{}0.10, are consistent with the standard model.

Published
1989

6. Measurements of the e+e− total hadronic cross section and a determination of M Λ

Author

C. Rosenfeld, S. S. Myung, S. Trentalange, T. Nozaki, P. Perez, A. Bodek, H. Kagan, Kiyosumi Tsuchiya, A. T.M. Wang, Tsunehiko Omori, J. R. Smith, R. Coombes, K. Eguchi, T. Takeda, Gui Nyun Kim, A. Maki, R. Tanaka, Steve Schnetzer, Kazuo Abe, Yusuke Higashi, H. Miyata, Hiroyuki Sagawa, Dong-Chul Son, K. Gotow, D. Perticone, Kaori Maeshima, A. Bacala, J. S. Kang, Robert Stone, H. S. Budd, E. H. Low, W. Metcalf, K. Ueno, S. Sakamoto, K. Miyano, C. A. Fry, M. H. Lee, H. Itoh, R. Imlay, A. Murakami, E. J. Kim, F. Sannes, J. Li, S. Matsumoto, D. Blanis, Y. Sugimoto, K. Toyoshima, Hyunyong Kim, I. H. Park, J. Vinson, C. P. Cheng, S. Lusin, A. Abashian, E. H. Thorndike, J. Lim, T. Ishizuka, K. L. Sterner, Z. P. Mao, M. Frautschi, R. Chiba, T. Thomas, Yoshimasa Kurihara, H. Kozuka, H. Yokota, S. Igarashi, H. Harada, Rr Mcneil, N. M. Shaw, H. W. Zheng, S. K. Kim, H. Ichinose, F. Kajino, Y. Takaiwa, Y. C. Zhu, S. L. Olsen, R. L. Lander, R. L. Malchow, Yongsun Kim, R. D. Kass, T. Mori, C. G. Trahern, T. Kumita, L. E. Piilonen, Y. T. Xu, A. Sill, Y. K. Li, K. Ohta, Y. Sakai, Winston Ko, R. Poling, S. Kobayashi, Y. H. Ho, T. Sasaki, S. Wilson, Y. Fujii, James C. Green, F. Naito, K. Sparks, M. C.S. Williams, Sarah Catherine Eno, Susumu Terada, P. N. Kirk, Y. Yamashita, M. E. Mattson, and Y. Ishi

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Electron–positron annihilation, Hadron, Standard Model, Nuclear physics, Cross section (physics), High Energy Physics::Experiment, Nuclear Experiment, Scale parameter, Boson
Abstract

The total cross section for e + e − annihilation into hadrons has been measured for CM energies ranging from 50 to 57 GeV. We fit the predictions of the standard model to these measurements and those at lower energies. The mass of the Z 0 boson, M Z , and the QCD scale parameter, Λ MS , are derived from the fit. The results are M Z =88.6 −1.8 +2.0 GeV/ c 2 , and Λ MS =0.15 −0.11 +0.16 GeV .

Published
1989

7. Measurement of the Leptonic Branching Ratios of theϒ(1S),ϒ(2S), andϒ(3S)

Author

G. C. Moneti, D. Andrews, D. G. Cassel, Karl Berkelman, Sheldon Stone, N. B. Mistry, J. W. Dewire, S. Holzner, S. Behrends, M. D. Mestayer, C. J. Bebek, Y. Kubota, G. Parkhurst, E. H. Thorndike, M. Ogg, R. S. Panvini, K. Chadwick, W. W. MacKay, P. Ganci, F. M. Pipkin, A. Fridman, D. L. Kreinick, Jan M. Guida, Richard Wilson, J. Chauveau, Joan A. Guida, J. Kandaswamy, Ron Poling, T. Gentile, M. Halling, P. Lipari, L. Garren, F. Morrow, R. Wilcke, R. Plunkett, R. Ehrlich, D. Peterson, Robert Stone, R. Galik, M. Ito, Murdock Gilchriese, A. Snyder, B. Gittelman, R. T. Giles, N. Horwitz, M. Goldberg, M. S. Alam, R. D. Kass, C. Rosenfeld, M. Hempstead, D. Weber, T. Ferguson, D. L. Hartill, V. Kistiakowsky, A. Chen, R. Perchonok, C. G. Trahern, S. L. Olsen, G. Rucinski, F. Sannes, J. Hassard, A. Silverman, P. C. Stein, S. E. Csorna, A. Jawahery, D. Herrup, H. Kagan, J. Rohlf, James C. Green, P. Avery, K. Kinoshita, A. J. Sadoff, Joseph Izen, R. G. Hicks, A. C. Melissinos, E. Nordberg, M. Jibaly, H. Van Hecke, and P. Skubic

Subjects
Nuclear physics, Physics, Particle physics, Particle decay, Muon, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Cornell Electron Storage Ring, Lepton
Abstract

Using the CLEO detector at the Cornell Electron Storage Ring, the authors have measured the leptonic branching fraction, B/sub mumu/, of the UPSILON(1S), UPSILON(2S), and UPSILON(3S) to be 2.7 +- 0.3 +- 0.3%, 1.9 +- 1.3 +- 0.5%, and 3.3 +- 1.3 +- 0.7%, respectively. Combining these values of B/sub mumu/ with previous measurements of the leptonic widths of these resonances, the authors find the total width of the UPSILON(1S), UPSILON(2S), and UPSILON(3S) to be 48 +- 4 +- 4, 27 +- 17 +- 6, and 13 +- 4 +- 3 keV.

Published
1983

8. Measurements ofRand a Search for Heavy-Quark Production ine+e−Annihilation ats=50 and 52GeV

Author

T. Mori, K. Eguchi, R. Coombes, D. R. Johnson, Yusuke Higashi, F. T. Avignone, A. Sill, S. Igarashi, H. Itoh, E. H. Thorndike, M. Frautschi, K. Ohta, A. Bacala, Winston Ko, M. Miyashita, A. Maki, K. Hanaoka, D. Zimmerman, Robert Stone, S. S. Myung, S. Ishimoto, T. Nozaki, Rr Mcneil, C. G. Trahern, K. Gotow, S. Kobayashi, T. Maruta, Y. Sakai, Y. H. Ho, P. Perez, T. Kumita, Hyunyong Kim, T. Sasaki, C. P. Cheng, H. Yokota, H. Miyata, James C. Green, J. Edwards, Y. Yan, Ron Poling, F. Naito, J. S. Kang, Kiyosumi Tsuchiya, R. Imlay, D. Saroff, K. Sparks, F. Kajino, K. Toyoshima, S. Matsumoto, Z. P. Mao, Kazuo Abe, Dong-Chul Son, H. Murata, Hiroyuki Sagawa, Yoshimasa Kurihara, A. Abashian, Y. Fujii, K. Ueno, R. Childers, Y. C. Zhu, H. Harada, C. A. Fry, D. Blanis, S. Lusin, Sarah Catherine Eno, Kaori Maeshima, S. L. Olsen, Susumu Terada, Y. Sugimoto, H. S. Budd, M. Ogawa, C. Darden, A. Aldritch, K. Miyano, R. Chiba, R. L. Lander, G. N. Kim, H. Kagan, N. M. Shaw, S. Trentalange, M. C.S. Williams, C. Rosenfeld, I. H. Park, Steve Schnetzer, Tsunehiko Omori, H. S. Zhou, T. Ishizuka, Y. Takaiwa, A. Murakami, P. N. Kirk, Y. Yamashita, H. Kozuka, R. L. Malchow, Yongsun Kim, R. D. Kass, H. W. Zheng, H. Otsuki, Hoyun Lee, P. Mani, A. Bodek, H. Asakura, R. Tanaka, W. Metcalf, S. Sakamoto, S. K. Kim, F. Sannes, S. Wilson, T. Takeda, Y. Ishi, Y. T. Xu, E. J. Kim, W. Marterer, and S. Chakrabarti

Subjects
Elastic scattering, Physics, Quark, Nuclear physics, Particle physics, Annihilation, Electron–positron annihilation, Hadron, General Physics and Astronomy, Parton, Elementary particle, Bhabha scattering
Abstract

The R ratio for e/sup +/e/sup -/ annihilation into hadronic final states is measured to be 4.34 +- 0.45 +- 0.30 and 4.23 +- 0.20 +- 0.21 at c.m. energies of 50 and 52 GeV, respectively. From these values of R and an analysis of the event shapes we deduce a 95%-confidence-level upper limit for the production rate of new heavy charge +(2/3e or -(1/3e quarks to be 0.19 units of R.

Published
1988

9. High-statistics study ofϒ(2S)→π+π−ϒ(1S)

Author

D. L. Hartill, Ron Poling, Y. Kubota, S. Holzner, S. Behrends, M. Goldberg, G. C. Moneti, Richard Wilson, R. Namjoshi, Paul Tipton, Joan A. Guida, J. Kandaswamy, D. G. Cassel, M. Hempstead, R. Wilcke, S. L. Olsen, Murdock Gilchriese, T. Gentile, B. Gittelman, L. Garren, W. W. MacKay, R. D. Kass, E. H. Thorndike, A. Chen, M. Ogg, H. Van Hecke, J. W. Dewire, F. M. Pipkin, F. Sannes, N. B. Mistry, R. Ehrlich, Jan M. Guida, C. Bebek, G. Parkhurst, M. D. Mestayer, M. S. Alam, D. Weber, R. S. Panvini, R. G. Hicks, Xia Yi, F. Morrow, Karl Berkelman, J. Hassard, A. Silverman, N. Horwitz, R. S. Galik, H. Kagan, M. Ito, J. Chauveau, M. Halling, R. T. Giles, A. C. Melissinos, A. J. Sadoff, C. G. Trahern, P. Avery, P. Haas, Robert Stone, D. Besson, P. C. Stein, S. E. Csorna, James C. Green, K. Kinoshita, C. Rosenfeld, P. Lipari, D. Peterson, T. Jensen, Sheldon Stone, K. Chadwick, E. Nordberg, T. Ferguson, P. Skubic, A. Jawahery, D. L. Kreinick, and A. Snyder

Subjects
Physics, Particle decay, Pion, Meson, Branching fraction, Electron–positron annihilation, Hadron, Analytical chemistry, Elementary particle, Cornell Electron Storage Ring
Abstract

A detailed investigation of the decay UPSILON(2S)..--> pi../sup +/..pi../sup -/UPSILON(1S) has been made from 128 000 UPSILON(2S) decays observed in the CLEO detector at the Cornell Electron Storage Ring (CESR). We find this branching ratio to be (19.1 +- 1.2 +- 0.6)%. The properties of the ..pi pi.. system have been studied using 491 exclusive events of the type UPSILON(2S)..--> pi../sup +/..pi../sup -/UPSILON(1S), UPSILON(1S)..-->..e/sup +/e/sup -/ or ..mu../sup +/..mu../sup -/. Assuming e-..mu.. universality we find B(UPSILON(1S)..--> mu../sup +/..mu../sup -/) = (2.84 +- 0.18 +- 0.20)%. A search for UPSILON(2S)..-->..etaUPSILON(1S) yields an upper limit of 1% at the 90% confidence level for this branching ratio. We have also searched for (UPSILON(2S) or UPSILON(3S))..--> pi../sup +/..pi../sup -/UPSILON(1S), UPSILON(1S)..-->..noninteracting particles.

Published
1984

10. ΛcProduction frome+e−Annihilation in theϒEnergy Region

Author

Murdock Gilchriese, B. Gittelman, Jan M. Guida, M. Ito, D. Bartoletto, D. Peterson, Paul Tipton, Ron Poling, D. G. Cassel, R. S. Galik, Xia Yi, R. DeSalvo, Themistocles Bowcock, G. C. Moneti, R. D. Kass, C. Bebek, G. Parkhurst, Y. Kubota, D. Besson, R. S. Panvini, D. L. Hartill, A. Chen, P. Lubrano, F. Sannes, Richard Wilson, D. Perticone, S. Holzner, S. Behrends, James C. Green, E. H. Thorndike, A. M. Halling, T. Copie, J. W. Dewire, F. M. Pipkin, M. Goldberg, M. S. Alam, Thomas Ferguson, Robert Stone, C. Rosenfeld, G. B. Word, P. C. Stein, S. E. Csorna, H. Kagan, Alice Bean, Sheldon Stone, K. Kinoshita, M. D. Mestayer, C. G. Trahern, P. Avery, N. B. Mistry, R. Namjoshi, S. W. Gray, Joan A. Guida, J. Kandaswamy, F. Morrow, A. J. Sadoff, M. Hempstead, T. Gentile, P. Haas, M. Ogg, J. Hassard, A. Silverman, E. Nordberg, R. T. Giles, P. Skubic, N. Horwitz, A. Jawahery, H. Van Hecke, M. Pisharody, Karl Berkelman, Xu Kezun, B. K. Heltsley, Kenneth Francis Read, D. L. Kreinick, T. Jensen, L. Garren, and R. Ehrlich

Subjects
Physics, Particle physics, Annihilation, Meson, Branching fraction, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Lambda, Nuclear physics, Baryon, Particle decay, Pion, High Energy Physics::Experiment, Nuclear Experiment
Abstract

We have observed ..lambda../sub c/ baryons in nonresonant e/sup +/e/sup -/ annihilation at energies around ..sqrt..s = 10.5 GeV through their decay to ..lambda pi../sup +/..pi../sup +/..pi../sup -/. We measure the branching fraction to be (2.8 +- 0.7 +- 1.1)%. The momentum spectrum of the ..lambda../sub c/ is similar to that of charmed mesons, providing a constraint on models of charmed-quark hadronization.

Published
1985

11. Observation of the decay B¯D+0ρ−

Author

Xia Yi, M. S. Alam, Robert Stone, Xu Kezun, Joan A. Guida, J. Kandaswamy, A. Jawahery, L. Garren, M. Halling, M. D. Mestayer, C. G. Trahern, R. T. Giles, R. Ehrlich, D. Peterson, D. L. Kreinick, M. Ito, P. Skubic, P. C. Stein, C. Bebek, G. Parkhurst, D. Besson, P. Avery, Kenneth Francis Read, S. E. Csorna, E. H. Thorndike, A. Chen, F. M. Pipkin, M. Goldberg, P. Haas, N. B. Mistry, F. Sannes, Karl Berkelman, G. C. Moneti, T. Ferguson, R. Namjoshi, K. Kinoshita, C. Rosenfeld, D. Perticone, S. Holzner, R. S. Galik, Sheldon Stone, S. Behrends, M. Ogg, And H. Van Hecke, R. D. Kass, N. Horwitz, Paul Tipton, R. DeSalvo, E. Nordberg, D. L. Hartill, Ron Poling, M. Hempstead, W. W. MacKay, H. Kagan, Richard Wilson, A. J. Sadoff, J. Hassard, A. Silverman, D. G. Cassel, T. Copie, J. W. Dewire, T. Jensen, Jan M. Guida, Y. Kubota, Murdock Gilchriese, B. Gittelman, R. S. Panvini, F. Morrow, T. Gentile, and James C. Green

Subjects
Physics, Particle physics, Particle decay, Pair production, Pion, Meson, Branching fraction, Hadron, Elementary particle, B meson
Abstract

The decay B-bar /sup 0/..-->..D/sup asterisk+/rho/sup -/ has been observed and the branching ratio is found to be (8.1 +- 2.9/sub -2.4//sup +5.9/)%. The result is compared with theoretical predictions.

Published
1985

12. Observation of Exclusive Decay Modes ofb-Flavored Mesons

Author

Ron Poling, E. H. Thorndike, F. M. Pipkin, Y. Kubota, V. Kistiakowsky, M. Hempstead, D. Herrup, D. L. Kreinick, J. Rohlf, C. Rosenfeld, Karl Berkelman, D. G. Cassel, J. Chauveau, A. Snyder, M. S. Alam, M. Halling, R. G. Hicks, D. Weber, Richard Wilson, A. J. Sadoff, M. Ogg, R. Wilcke, Murdock Gilchriese, P. Lipari, S. L. Olsen, J. Hassard, A. Silverman, B. Gittelman, L. Garren, R. S. Panvini, D. Peterson, R. Plunkett, K. Chadwick, G. Rucinski, N. Horwitz, R. Galik, R. Perchonok, R. T. Giles, R. Ehrlich, F. Morrow, A. Chen, J. W. Dewire, Jan M. Guida, F. Sannes, Joseph Izen, T. Ferguson, A. Jawahery, P. Avery, S. Holzner, S. Behrends, M. Ito, R. D. Kass, Joan A. Guida, J. Kandaswamy, A. C. Melissinos, D. Andrews, E. Nordberg, M. Jibaly, H. Van Hecke, P. Skubic, G. C. Moneti, Sheldon Stone, D. L. Hartill, N. B. Mistry, C. G. Trahern, James C. Green, P. C. Stein, S. E. Csorna, K. Kinoshita, M. D. Mestayer, Robert Stone, C. Bebek, G. Parkhurst, Harris Kagan, T. Gentile, W. W. MacKay, Richard Talman, P. Ganci, and M. Goldberg

Subjects
Nuclear physics, Physics, Particle decay, Particle physics, Pion, Meson, Electron–positron annihilation, Hadron, General Physics and Astronomy, Invariant mass, Elementary particle, Boson
Abstract

$B$-meson decays to final states consisting of a ${D}^{0}$ or ${D}^{*\ifmmode\pm\else\textpm\fi{}}$ and one or two charged pions have been observed. The charged-$B$ mass is 5270.8 \ifmmode\pm\else\textpm\fi{} 2.3 \ifmmode\pm\else\textpm\fi{} 2.0 MeV and the neutral-$B$ mass is 5274.2 \ifmmode\pm\else\textpm\fi{} 1.9 \ifmmode\pm\else\textpm\fi{} 2.0 MeV.

Published
1983

13. Hyperon Production ine+e−Interactions in the Upsilon Region

Author

Y. Kubota, D. G. Cassel, H. Kagan, D. L. Hartill, Ron Poling, M. Hempstead, M. S. Alam, M. Goldberg, A. J. Sadoff, G. C. Moneti, Murdock Gilchriese, C. Rosenfeld, L. Garren, B. Gittelman, Robert Stone, D. L. Kreinick, Jan M. Guida, D. Weber, R. Wilcke, R. S. Panvini, Paul Tipton, J. W. Dewire, K. Chadwick, R. Ehrlich, P. Avery, F. Morrow, N. Horwitz, D. Besson, J. Hassard, A. Silverman, T. Ferguson, James C. Green, M. D. Mestayer, S. L. Olsen, C. Bebek, G. Parkhurst, A. Jawahery, A. Chen, F. Sannes, J. Chauveau, M. Ito, R. G. Hicks, A. C. Melissinos, H. Van Hecke, M. Halling, E. H. Thorndike, T. Jensen, C. G. Trahern, F. M. Pipkin, M. Ogg, R. T. Giles, Karl Berkelman, Xia Yi, T. Gentile, R. S. Galik, P. Lipari, P. C. Stein, S. E. Csorna, D. Peterson, Richard Wilson, K. Kinoshita, P. Haas, P. Skubic, N. B. Mistry, Joan A. Guida, J. Kandaswamy, A. Snyder, E. Nordberg, R. D. Kass, Sheldon Stone, S. Holzner, S. Behrends, W. W. MacKay, M. E. Hejazifar, and R. Namjoshi

Subjects
Baryon, Nuclear physics, Physics, Particle physics, Annihilation, Meson, Electron–positron annihilation, Hadron, Hyperon, General Physics and Astronomy, Lambda, Gluon
Abstract

We report measurements from CLEO detector of the rate of ..xi.. and ..lambda.. production in e/sup +/e/sup -/ interactions in the upsilon region. Hyperon production from the decay of the UPSILON(1S) is compared with continuum e/sup +/e/sup -/ data. The ratio of the production rates of ..lambda.. (and Lambda-bar) to K/sup 0/ (and K-bar /sup 0/) on the UPSILON(1S) is 0.21 +- 0.03, much larger than in the continuum, 0.07 +- 0.01. The ratios of the production rates of the ..xi.. and the ..lambda.. are comparable, 0.10 +- 0.02 (UPSILON(1S)) and 0.07 +- 0.02 (continuum). We discuss some implications of the data for gluon and quark fragmentation models.

Published
1984

14. Evidence for theFMeson at 1970 MeV

Author

J. Chauveau, C. Rosenfeld, Richard Wilson, Karl Berkelman, V. Kistiakowsky, Joan A. Guida, J. Kandaswamy, A. Jawahery, D. G. Cassel, R. S. Panvini, D. L. Hartill, D. L. Kreinick, E. Nordberg, H. Van Hecke, R. Wilcke, N. Horwitz, A. Chen, Murdock Gilchriese, F. Sannes, D. Weber, A. Snyder, P. Skubic, A. J. Sadoff, B. Gittelman, S. L. Olsen, James C. Green, T. Gentile, J. Hassard, A. Silverman, M. D. Mestayer, Xia Yi, R. Plunkett, Ron Poling, E. H. Thorndike, M. Ogg, F. M. Pipkin, P. Lipari, M. S. Alam, H. Halling, D. Peterson, D. Herrup, J. W. Dewire, Y. Kubota, L. Garren, Jan M. Guida, R. G. Hicks, R. Ehrlich, M. Hempstead, P. Avery, Paul Tipton, A. C. Melissinos, N. B. Mistry, R. Perchonok, K. Chadwick, C. G. Trahern, F. Morrow, P. C. Stein, S. E. Csorna, T. Ferguson, K. Kinoshita, R. T. Giles, R. Galik, Harris Kagan, G. C. Moneti, S. Holzner, S. Behrends, W. W. MacKay, R. D. Kass, P. Ganci, Sheldon Stone, M. Goldberg, C. Bebek, G. Parkhurst, M. Ito, Robert Stone, and G. Rucinski

Subjects
Physics, Particle physics, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Nuclear physics, Particle decay, Pion, High Energy Physics::Experiment, Continuum (set theory), Nuclear Experiment
Abstract

Evidence is presented for a narrow meson resonance of mass 1970\ifmmode\pm\else\textpm\fi{}5\ifmmode\pm\else\textpm\fi{}5 MeV produced in continuum ${e}^{+}{e}^{\ensuremath{-}}$ annihilations at $\sqrt{s}$ of 10.5 GeV, and decaying into a $\ensuremath{\phi}$ and a charged $\ensuremath{\pi}$.

Published
1983

15. Experimental evidence for the non-Abelian nature of QCD from a study of multijet events produced ine+e−annihilation

Author

W. Metcalf, I. H. Park, S. Sakamoto, T. Ishizuka, F. Naito, Kazumasa Miyano, F. Sannes, K. Sparks, K. Toyoshima, Y. C. Zhu, S. L. Olsen, Hiroyuki Sagawa, T. Mori, C. G. Trahern, T. Kumita, R. Coombes, R. R. McNeil, L. E. Piilonen, E. H. Thorndike, Sarah Catherine Eno, Susumu Terada, J. Lim, J. Li, T. Takeda, Alan Sill, R. Chiba, M. C.S. Williams, J. S. Kang, S. K. Kim, H. Kagan, S. Igarashi, H. Ichinose, J. Vinson, H. Miyata, R. L. Imlay, F. Kajino, Y. K. Li, A. Murakami, S. Kobayashi, M. H. Lee, H. S. Budd, P. N. Kirk, C. A. Fry, S. S. Myung, R. Poling, D. Blanis, C. P. Cheng, Y. Yamashita, H. Itoh, M. E. Mattson, K. Eguchi, Y. Sakai, Hideo Yokota, James C. Green, Yusuke Higashi, A. Maki, S. Lusin, K. L. Sterner, K. Ohta, Winston Ko, Yoshimasa Kurihara, A. Bacala, Y. H. Ho, Tsunehiko Omori, Robert Stone, Kazuo Abe, G. N. Kim, N. M. Shaw, Dong-Chul Son, J. R. Smith, Kaori Maeshima, Ryuki Tanaka, S. Matsumoto, Y. Takaiwa, S. Trentalange, D. Perticone, E. H. Low, P. Perez, T. L.T. Thomas, Kiyosumi Tsuchiya, A. T.M. Wang, Z. P. Mao, A. Abashian, Steve Schnetzer, H. Harada, R. L. Lander, M. Frautschi, Hyunyong Kim, K. Gotow, S. Wilson, K. Ueno, R. L. Malchow, Yongsun Kim, R. D. Kass, Y. T. Xu, H. Kozuka, T. Nozaki, Y. Ishi, H. W. Zheng, E. J. Kim, Takashi Sasaki, Y. Fujii, Yasuhiro Sugimoto, A. Bodek, and C. Rosenfeld

Subjects
Physics, Quantum chromodynamics, Coupling constant, Particle physics, Annihilation, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Elementary particle, Nuclear physics, High Energy Physics::Experiment, Production (computer science), Abelian group
Abstract

We present evidence for the non-Abelian nature of QCD from a study of multijet events produced in ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilations from \ensuremath{\surd}s =50 to 57 GeV in the AMY detector at the KEK storage ring TRISTAN. A comparison of the three-jet event fraction at TRISTAN to the fraction of the DESY storage ring PETRA shows that the QCD coupling strength ${\ensuremath{\alpha}}_{s}$ decreases with increasing ${Q}^{2}$. In addition, measurements of the angular distributions of four-jet events show evidence for the triple-gluon vertex.

Published
1989

16. D0Spectrum fromB-Meson Decay

Author

Robert Stone, Xia Yi, D. G. Cassel, C. G. Trahern, P. C. Stein, S. E. Csorna, N. Horwitz, H. Kagan, J. Chauveau, K. Kinoshita, S. L. Olsen, M. Halling, R. Plunkett, E. H. Thorndike, A. Jawahery, F. M. Pipkin, D. Weber, A. J. Sadoff, J. Hassard, Ron Poling, Y. Kubota, C. Bebek, G. Parkhurst, A. Snyder, A. Silverman, Karl Berkelman, A. C. Melissinos, Jan M. Guida, A. Chen, L. Garren, F. Sannes, K. Chadwick, M. Hempstead, D. Herrup, D. L. Kreinick, D. Andrews, S. Holzner, S. Behrends, R. Ehrlich, M. Ogg, P. Skubic, C. Rosenfeld, M. Ito, M. S. Alam, T. Ferguson, M. D. Mestayer, R. Wilcke, Murdock Gilchriese, P. Lipari, P. Avery, R. S. Panvini, B. Gittelman, R. Perchonok, R. Galik, D. Peterson, N. B. Mistry, E. Nordberg, M. Jibaly, H. Van Hecke, Joan A. Guida, D. L. Hartill, J. Kandaswamy, F. Morrow, V. Kistiakowsky, R. D. Kass, R. G. Hicks, James C. Green, G. Rucinski, T. Gentile, Sheldon Stone, R. T. Giles, G. C. Moneti, J. W. Dewire, M. Goldberg, W. W. MacKay, P. Ganci, and Richard Wilson

Subjects
Physics, Quark, Semileptonic decay, Meson, Branching fraction, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, General Physics and Astronomy, Nuclear physics, Particle decay, Pion, High Energy Physics::Experiment, B meson, Nuclear Experiment
Abstract

The inclusive branching fraction for B-meson decay into D/sup 0/ mesons and the momentum spectrum of the D/sup 0/'s have been measured. 0.8 +- 0.2 +- 0.2 D/sup 0/ per B decay was found. The shape of the spectrum suggests an interesting picture of B-meson decay.

Published
1983

17. DecayB→ψX

Author

P. Haas, M. Hempstead, T. Jensen, H. Kagan, R. Kass, S. Behrends, T. Gentile, Jan M. Guida, Joan A. Guida, F. Morrow, R. Poling, C. Rosenfeld, E. H. Thorndike, P. Tipton, D. Besson, J. Green, R. Namjoshi, F. Sannes, P. Skubic, R. Stone, D. Bortoletto, A. Chen, M. Goldberg, N. Horwitz, A. Jawahery, P. Lubrano, G. C. Moneti, C. G. Trahern, H. van Hecke, S. E. Csorna, L. Garren, M. D. Mestayer, R. S. Panvini, G. B. Word, Xia Yi, M. S. Alam, A. Bean, T. Ferguson, P. Avery, C. Bebek, K. Berkelman, E. Blucher, D. G. Cassel, T. Copie, R. DeSalvo, J. W. DeWire, R. Ehrlich, R. S. Galik, M. G. D. Gilchriese, B. Gittelman, S. W. Gray, A. M. Halling, D. L. Hartill, B. K. Heltsley, S. Holzner, M. Ito, J. Kandaswamy, D. L. Kreinick, Y. Kubota, N. B. Mistry, E. Nordberg, M. Ogg, D. Peterson, D. Perticone, M. Pisharody, K. Read, A. Silverman, P. C. Stein, S. Stone, Xu Kezun, A. J. Sadoff, T. Bowcock, R. T. Giles, J. Hassard, K. Kinoshita, F. M. Pipkin, and Richard Wilson

Subjects
Physics, Muon, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Nuclear physics, Pair production, High Energy Physics::Experiment, B meson, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics, Lepton
Abstract

We have measured the inclusive branching ratio for B..-->..psiX to be (1.10 +- 0.21 +- 0.23)%. The momentum distribution of the psi mesons suggests a significant fraction of two-body decays.

Published
1985

18. Measurement of the Branching Fraction of the Decayϒ(1S)→τ+τ−

Author

P. Skubic, A. Snyder, T. Gentile, N. B. Mistry, Joan A. Guida, J. Kandaswamy, L. Garren, F. Morrow, Ron Poling, J. Chauveau, E. Nordberg, M. Jibaly, E. H. Thorndike, Robert Stone, H. Van Hecke, V. Kistiakowsky, R. Galik, S. Holzner, S. Behrends, J. W. Dewire, Richard Wilson, F. M. Pipkin, D. L. Kreinick, R. Ehrlich, M. Hempstead, M. Halling, P. Lipari, H. Kagan, A. Chen, P. Avery, D. Peterson, F. Sannes, M. S. Alam, G. Rucinski, A. J. Sadoff, D. Weber, C. Bebek, G. Parkhurst, C. Rosenfeld, J. Hassard, A. Silverman, M. Ogg, R. G. Hicks, R. D. Kass, Joseph Izen, R. T. Giles, K. Chadwick, R. S. Panvini, T. Ferguson, A. Jawahery, R. Perchonok, C. G. Trahern, S. L. Olsen, Sheldon Stone, R. Plunkett, P. C. Stein, S. E. Csorna, K. Kinoshita, A. C. Melissinos, D. Herrup, D. Andrews, D. G. Cassel, M. D. Mestayer, M. Ito, M. Goldberg, D. L. Hartill, James C. Green, J. Rohlf, W. W. MacKay, P. Ganci, G. C. Moneti, Jan M. Guida, Y. Kubota, R. Wilcke, Murdock Gilchriese, B. Gittelman, Karl Berkelman, and N. Horwitz

Subjects
Physics, Particle physics, Muon, Meson, Branching fraction, Hadron, General Physics and Astronomy, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Fermion, Particle decay, High Energy Physics::Experiment, Astrophysics::Galaxy Astrophysics, Lepton
Abstract

The branching fraction for the decay of the UPSILON(1S) into tau pairs has been measured to be 3.4 +- 0.4 +- 0.4%. This result agrees with the previously measured branching ratio of the decay into muon pairs.

Published
1983

19. Inclusiveφproduction inB-meson decay

Author

I. J. Kim, T. Copie, Ron Poling, R. S. Galik, Y. Kubota, Jan M. Guida, M. Goldberg, D. Perticone, S. Holzner, S. Behrends, H. Kagan, C. Bebek, R. T. Giles, P. Skubic, Themistocles Bowcock, D. G. Cassel, A. Chen, E. H. Thorndike, A. Jawahery, H. Van Hecke, F. Sannes, P. Avery, C. G. Trahern, P. C. Stein, R. Kowalewski, F. M. Pipkin, P. Haas, D. L. Kreinick, S. E. Csorna, Daniela Bortoletto, T. Jensen, A. J. Sadoff, M. Pisharody, Thomas Ferguson, E. Blucher, Sheldon Stone, M. Ito, Karl Berkelman, K. Kinoshita, Murdock Gilchriese, R. Namjoshi, J. Hassard, A. Silverman, Paul Tipton, J. W. Dewire, N. B. Mistry, C. Rosenfeld, S. W. Gray, N. Horwitz, L. Garren, N. Katayama, B. Gittelman, R. DeSalvo, A. M. Halling, D. Riley, G. B. Word, G. C. Moneti, P. Lubrano, Robert Stone, Joan A. Guida, J. Kandaswamy, M. Ogg, D. Besson, R. S. Panvini, M. Hempstead, Alice Bean, Chih-Ree Sun, R. D. Kass, M. D. Mestayer, Richard Wilson, E. Nordberg, F. Morrow, D. Peterson, M. S. Alam, T. Gentile, V. Tanikella, Xia Yi, R. Ehrlich, James Mueller, D. L. Hartill, James C. Green, B. K. Heltsley, and Kenneth Francis Read

Subjects
Physics, Particle physics, Annihilation, Meson, Branching fraction, Hadron, General Physics and Astronomy, Elementary particle, Nuclear physics, Particle decay, Pair production, High Energy Physics::Experiment, B meson, Astrophysics::Earth and Planetary Astrophysics
Abstract

We have measured the inclusive branching ratio for B..-->..phiX to be 0.023 +- 0.006 +- 0.005. The momentum distribution of the phi mesons is compared with that expected from the cascade decays B..-->..F..-->..phi and B..-->..D..-->..phi. .AE

Published
1986

20. Observation of New Structure in thee+e−Cross Section above theϒ(4S)

Author

R. D. Kass, C. Bebek, G. Parkhurst, A. Jawahery, T. Jensen, P. Lipari, M. S. Alam, Joan A. Guida, D. L. Kreinick, J. Kandaswamy, P. Skubic, M. Ito, Robert Stone, D. G. Cassel, Murdock Gilchriese, R. T. Giles, L. Garren, R. DeSalvo, D. Peterson, Sheldon Stone, B. Gittelman, D. Perticone, S. Holzner, S. Behrends, K. Chadwick, Richard Wilson, James C. Green, T. Gentile, R. Ehrlich, Xu Kezun, J. W. Dewire, H. Van Hecke, T. Ferguson, P. Haas, C. Rosenfeld, Karl Berkelman, R. S. Panvini, A. Chen, Kenneth Francis Read, M. Ogg, J. Hassard, N. B. Mistry, Jan M. Guida, A. Silverman, F. Sannes, M. D. Mestayer, Xia Yi, A. Snyder, Y. Kubota, W. W. MacKay, P. Avery, D. Besson, N. Horwitz, T. Copie, A. C. Melissinos, M. Goldberg, G. C. Moneti, Paul Tipton, E. Nordberg, R. Namjoshi, M. Halling, C. G. Trahern, F. Morrow, P. C. Stein, S. E. Csorna, K. Kinoshita, S. L. Olsen, D. L. Hartill, Ron Poling, E. H. Thorndike, F. M. Pipkin, R. S. Galik, M. Hempstead, H. Kagan, and A. J. Sadoff

Subjects
Nuclear physics, Physics, Particle decay, Particle physics, Annihilation, Meson, Electron–positron annihilation, Hadron, General Physics and Astronomy, Multiplicity (mathematics), Elementary particle, Lepton
Abstract

Measurements of the ${e}^{+}{e}^{\ensuremath{-}}$ cross section above $B\overline{B}$ threshold are reported. Structures are observed which could be the $\ensuremath{\Upsilon}(5S)$ and $\ensuremath{\Upsilon}(6S)$ resonances. The masses and widths are given and compared with various potential-model predictions. Average charged multiplicities and inclusive lepton yields are also presented.

Published
1985

21. Observation of Radiative Decays of theϒ(2S)

Author

H. Kagan, F. Morrow, D. Weber, J. Hassard, A. Silverman, R. D. Kass, A. Chen, F. Sannes, C. Bebek, G. Parkhurst, A. J. Sadoff, Richard Wilson, L. Garren, W. W. MacKay, C. Rosenfeld, Y. Kubota, R. Wilcke, R. Ehrlich, P. Skubic, T. Jensen, M. S. Alam, Jan M. Guida, H. Van Hecke, Robert Stone, Xia Yi, R. T. Giles, D. Besson, Murdock Gilchriese, R. Namjoshi, D. L. Hartill, E. H. Thorndike, Ron Poling, B. Gittelman, T. Gentile, A. Jawahery, R. G. Hicks, F. M. Pipkin, J. Chauveau, P. Lipari, D. G. Cassel, D. Peterson, D. L. Kreinick, S. Holzner, S. Behrends, M. Halling, C. G. Trahern, M. Hempstead, Karl Berkelman, M. Ogg, M. D. Mestayer, M. Ito, R. S. Panvini, K. Chadwick, Paul Tipton, Joan A. Guida, P. Avery, J. Kandaswamy, R. S. Galik, N. Horwitz, S. L. Olsen, M. Goldberg, T. Ferguson, G. C. Moneti, James C. Green, A. C. Melissinos, E. Nordberg, A. Snyder, P. Haas, N. B. Mistry, Sheldon Stone, P. C. Stein, S. E. Csorna, J. W. Dewire, and K. Kinoshita

Subjects
Physics, Nuclear physics, Massless particle, Photon, Meson, Branching fraction, Hadron, Radiative transfer, General Physics and Astronomy, High Energy Physics::Experiment, Elementary particle, Atomic physics, Spectral line
Abstract

Evidence is reported from the CLEO detector for the chi/sub b/(1P) states from radiative decays of the UPSILON(2S). Photons are detected by pair conversion in the beam pipe or a lead radiator, and the pair momenta are measured in the drift chamber. Two photon lines are well resolved, with energies 109.5 +- 0.7 +- 1 and 129.0 +- 0.8 +- 1 MeV.

Published
1984

22. Observation of Baryons inB-Meson Decay

Author

G. Parkhurst, Richard Wilson, D. G. Cassel, M. S. Alam, C. Rosenfeld, A. Chen, Harris Kagan, E. H. Thorndike, D. L. Kreinick, F. Sannes, J. W. Dewire, F. M. Pipkin, J. Chauveau, Y. Kubota, Robert Stone, S. Holzner, S. Behrends, W. W. MacKay, M. Halling, P. Ganci, R. Wilcke, Jan M. Guida, D. Herrup, Murdock Gilchriese, B. Gittelman, Sheldon Stone, Ron Poling, Paul Tipton, P. Lipari, T. Gentile, R. T. Giles, D. Peterson, G. C. Moneti, L. Garren, P. Skubic, M. Hempstead, M. D. Mestayer, M. Goldberg, V. Kistiakowsky, R. S. Panvini, R. Ehrlich, N. B. Mistry, P. Avery, D. Weber, A. Snyder, A. J. Sadoff, Xia Yi, S. L. Olsen, E. Nordberg, H. Van Hecke, J. Hassard, A. Silverman, R. D. Kass, R. Plunkett, A. Jawahery, Joan A. Guida, R. Perchonok, J. Kandaswamy, M. Ito, K. Chadwick, M. Ogg, T. Ferguson, F. Morrow, R. Galik, D. L. Hartill, James C. Green, R. G. Hicks, A. C. Melissinos, C. G. Trahern, P. C. Stein, S. E. Csorna, K. Kinoshita, G. Rucinski, N. Horwitz, Karl Berkelman, and C. Bebek

Subjects
Physics, Quark, Particle physics, Meson, Branching fraction, Nuclear Theory, Hadron, General Physics and Astronomy, Nuclear physics, Particle decay, Physics::Accelerator Physics, High Energy Physics::Experiment, B meson, Cornell Electron Storage Ring, Nuclear Experiment, Nucleon
Abstract

In a sample of B mesons from the decay of the UPSILON(4S) produced in e/sup +/e/sup -/ collisions at the Cornell Electron Storage Ring, inclusive protons, antiprotons, lambdas and antilambdas have been observed. Lower limits to the B-to-baryon branching ratios are derived.

Published
1983

23. Search for monoenergetic photons from Υ(1S)→γ+X

Author

P. Skubic, I. J. Kim, M. D. Mestayer, D. L. Kreinick, E. H. Thorndike, D. Riley, F. Morrow, Xia Yi, F. M. Pipkin, T. Gentile, P. Lubrano, T. Copie, N. Horwitz, Joan A. Guida, H. Kagan, M. Hempstead, J. Kandaswamy, P. C. Stein, V. Tanikella, S. E. Csorna, Daniela Bortoletto, D. L. Hartill, D. Peterson, J. W. Dewire, A. M. Halling, R. DeSalvo, K. Kinoshita, Alice Bean, C. Rosenfeld, G. C. Moneti, A. Jawahery, R. Kowalewski, Robert Stone, James C. Green, A. J. Sadoff, R. Ehrlich, E. Nordberg, M. Ogg, L. Garren, G. B. Word, Chih-Ree Sun, P. Haas, N. B. Mistry, A. Chen, Richard Wilson, J. Hassard, A. Silverman, T. Jensen, M. Ito, B. K. Heltsley, D. Perticone, S. Holzner, S. Behrends, F. Sannes, R. T. Giles, Kenneth Francis Read, R. D. Kass, H. Van Hecke, D. Besson, R. S. Panvini, Ron Poling, C. Bebek, T. J. V. Bowcock, James Mueller, M. S. Alam, M. Goldberg, M. Pisharody, Karl Berkelman, R. Namjoshi, S. W. Gray, P. Avery, N. Katayama, Sheldon Stone, Paul Tipton, E. Blucher, C. G. Trahern, Murdock Gilchriese, B. Gittelman, Jan M. Guida, Thomas Ferguson, R. S. Galik, Y. Kubota, and D. G. Cassel

Subjects
Nuclear physics, Physics, Range (particle radiation), Photon, Meson, Branching fraction, Hadron, Elementary particle, Particle identification, Boson
Abstract

We present the results of a search for monoenergetic photons from the process UPSILON(1S) el+X. Upper limits at 90% confidence level for the branching ratio B(UPSILON(1S) el+X) range from 0.1% to 1.4% for photon energies between 150 and 2000 MeV.

Published
1986

24. Inclusive hadron production in upsilon decays and in nonresonant electron-positron annihilation at 10.49 GeV

Author

H. Van Hecke, J. Hassard, A. Silverman, Xia Yi, P. Skubic, D. Besson, A. Jawahery, R. S. Panvini, M. S. Alam, Robert Stone, Karl Berkelman, A. C. Melissinos, E. H. Thorndike, D. L. Kreinick, Jan M. Guida, F. M. Pipkin, Kenneth Francis Read, M. D. Mestayer, P. Avery, M. Halling, C. G. Trahern, K. Chadwick, Xu Kezun, R. S. Galik, C. Bebek, G. Parkhurst, P. Lipari, Ron Poling, Sheldon Stone, Y. Kubota, F. Morrow, Paul Tipton, D. G. Cassel, T. Ferguson, S. Holzner, S. Behrends, C. Rosenfeld, D. L. Hartill, P. C. Stein, J. W. Dewire, M. Goldberg, S. E. Csorna, D. Peterson, T. Gentile, E. Nordberg, N. Horwitz, L. Garren, Murdock Gilchriese, S. L. Olsen, B. Gittelman, R. D. Kass, K. Kinoshita, R. Ehrlich, G. C. Moneti, M. Ogg, James C. Green, A. Chen, F. Sannes, P. Haas, T. Jensen, M. Hempstead, R. Namjoshi, W. W. MacKay, M. Ito, N. B. Mistry, A. Snyder, Richard Wilson, R. T. Giles, H. Kagan, Joan A. Guida, J. Kandaswamy, and A. J. Sadoff

Subjects
Physics, Particle physics, Annihilation, Meson, Electron–positron annihilation, Hadron, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Baryon, Nuclear physics, Pion, High Energy Physics::Experiment, Cornell Electron Storage Ring, Nuclear Experiment
Abstract

We report measurements of single-particle inclusive spectra and two-particle correlations in decays of the UPSILON(1S) resonance and in nonresonant annihilations of electrons and positrons at center-of-mass energy 10.49 GeV, just below BB-bar threshold. These data were obtained using the CLEO detector at the Cornell Electron Storage Ring (CESR) and provide information on the production of ..pi.., K, rho, K(, phi, p, ..lambda.., and ..xi.. in quark and gluon jets. The average multiplicity of hadrons per event for upsilon decays (compared with continuum annihilations) is 11.4 (10.5) pions, 2.4 (2.2) kaons, 0.6 (0.5) rho/sup 0/, 1.2 (0.8) K(, 0.6 (0.4) protons and antiprotons, 0.15 (0.08) phi, 0.19 (0.07) ..lambda.. and Lambda-bar, and 0.016 (0.005) ..xi../sup -/ and Xi-bar /sup +/. We have also seen evidence for eta and f/sup 0/ production. The most significant differences between upsilon and continuum final states are (1) the inclusive energy spectra fall off more rapidly with increasing particle energy in upsilon decays, (2) the production of heavier particles, especially baryons, is not as strongly suppressed in upsilon decays, and (3) baryon and antibaryon are more likely to be correlated at long range in upsilon decay than in continuum events.

Published
1985

25. A rare decay of theD0meson as a test of the extension of the line shape in a strongly decaying system

Author

A. Jawahery, R. Namjoshi, C. G. Trahern, and K. Jagannathan

Subjects
Nuclear physics, Physics, Particle physics, Particle decay, Pion, Meson, Branching fraction, Hadron, High Energy Physics::Experiment, Elementary particle, Line (formation), Boson
Abstract

The D/sup asterisk0/ is perhaps the narrowest known strongly decaying system. The decay mode D/sup asterisk0/..-->..D/sup +/..pi../sup -/ is kinematically ''forbidden.'' However, the small width leads to a line shape extending to many times the full width and hence, the above decay takes place with a small branching fraction and may be measurable in detectors like MARK III or CLEO II. We present estimates for the branching fraction and discuss the implications of measuring it.

Published
1985

26. Leptonic branching ratio of theϒ(2S)

Author

H. Van Hecke, Y. Kubota, E. H. Thorndike, F. M. Pipkin, Karl Berkelman, Paul Tipton, A. Snyder, M. D. Mestayer, C. Bebek, G. Parkhurst, T. Gentile, J. Chauveau, P. C. Stein, S. E. Csorna, M. Halling, C. G. Trahern, R. S. Galik, Jan M. Guida, K. Kinoshita, Sheldon Stone, D. L. Hartill, Ron Poling, R. S. Panvini, K. Chadwick, T. Jensen, D. G. Cassel, N. Horwitz, D. Besson, N. B. Mistry, Robert Stone, A. C. Melissinos, Murdock Gilchriese, B. Gittelman, Joan A. Guida, J. Kandaswamy, M. Hempstead, R. Wilcke, S. L. Olsen, H. Kagan, A. Chen, F. Sannes, P. Hass, P. Lipari, T. Ferguson, M. Ito, J. W. De Wire, W. W. MacKay, R. D. Kass, A. J. Sadoff, C. Rosenfeld, D. Peterson, M. E. Hejazifar, James C. Green, A. Jawahery, Kenneth Francis Read, J. Hassard, A. Silverman, Xu Kezun, D. L. Kreinick, R. T. Giles, F. Morrow, P. Skubic, M. Ogg, P. Avery, M. Goldberg, G. C. Moneti, E. Nordberg, S. Holzner, S. Behrends, Richard Wilson, L. Garren, R. Namjoshi, R. Ehrlich, Xia Yi, and M. S. Alam

Subjects
Physics, Particle decay, Particle physics, Meson, Branching fraction, Electron–positron annihilation, Hadron, Elementary particle, Cornell Electron Storage Ring, Lepton
Abstract

Using the CLEO magnetic detector at the Cornell Electron Storage Ring, we find B(UPSILON(2S)..--> mu../sup +/..mu../sup -/) = 0.018 +- 0.008 (statistical) +- 0.005 (systematic) and B(UPSILON(2S)..-->..tau/sup +/tau/sup -/) = 0.017 +- 0.015 +- 0.006. .AE

Published
1984

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