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14 results on '"M. DAOUDI"'

1. Measurements of R=σL/σT for 0.03<x<0.1 and fit to world data

Author

P. Raines, Ingo Sick, S.St. Lorant, D. Kawall, H. Borel, H. Tang, C. Y. Prescott, J. M. Bauer, H. R. Band, R. G. Arnold, F. S. Dietrich, L. M. Stuart, T. Maruyama, Ch. Hyde-Wright, D. Walz, J. L. White, J. S. McCarthy, P. E. Bosted, G. Court, T. Averett, Vincent Breton, P. Grenier, B. Raue, Kevin P. Coulter, S. Hoibraten, Pascal Steiner, R. Erbacher, F. Staley, D. Reyna, O. Rondon, P.L. Anthony, K. A. Griffioen, A. Feltham, E. W. Hughes, D. Crabb, J. Button-Shafer, R. Prepost, S. E. Rock, Timothy Chupp, A. Rijllart, J. Gomez, Timothy B. Smith, Y. Terrien, J. A. Dunne, L. C. Smith, K. Witte, T. L. Usher, W. Meyer, C. C. Young, J. Fellbaum, J. R. Johnson, D. Zimmermann, Avraham Klein, J. Morgenstern, M. Kuriki, Y. Roblin, Donal Day, Z. E. Meziani, F. Suekane, J. P. Chen, H. Dutz, R. C. Minehart, B. Zihlmann, Emil Frlez, B. Youngman, Koji Abe, R. Antonov, R. M. Lombard-Nelsen, H. Fonvieille, L. S. Rochester, R. A. Lindgren, G. G. Petratos, R. Gearhart, J. Marroncle, F.R. Wesselmann, John C. Mitchell, H. Yuta, G. H. Zapalac, R. Pitthan, J. Clendenin, T. J. Liu, Dinko Pocanic, S. E. Kuhn, Z. M. Szalata, T. Akagi, M. Spengos, X.K. Maruyama, D. Garvey, C. Comptour, and M. Daoudi

Subjects
Physics, Nuclear and High Energy Physics, Cross section.transverse, 010308 nuclear & particles physics, Scattering, chemistry.chemical_element, Electron, 01 natural sciences, Nuclear physics, Cross section (physics), chemistry, 0103 physical sciences, 010306 general physics, Carbon
Abstract

Measurements were made at SLAC of the cross section for scattering 29 GeV electrons from carbon at a laboratory angle of 4.5°, corresponding to 0.03

Published
1999
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2. Measurement of the neutron spin structure function g and asymmetry A

Author

K. Abe, T. Akagi, B.D. Anderson, P.L. Anthony, R.G. Arnold, T. Averett, H.R. Band, C.M. Berisso, P. Bogorad, H. Borel, P.E. Bosted, V. Breton, M.J. Buenerd, G.D. Cates, T.E. Chupp, S. Churchwell, K.P. Coulter, M. Daoudi, P. Decowski, R. Erickson, J.N. Fellbaum, H. Fonvieille, R. Gearhart, V. Ghazikhanian, K.A. Griffioen, R.S. Hicks, R. Holmes, E.W. Hughes, G. Igo, S. Incerti, J.R. Johnson, W. Kahl, M. Khayat, Yu.G. Kolomensky, S.E. Kuhn, K. Kumar, M. Kuriki, R. Lombard-Nelsen, D.M. Manley, J. Marroncle, T. Maruyama, T. Marvin, W. Meyer, Z.-E. Meziani, D. Miller, G. Mitchell, M. Olson, G.A. Peterson, G.G. Petratos, R. Pitthan, R. Prepost, P. Raines, B.A. Raue, D. Reyna, L.S. Rochester, S.E. Rock, M.V. Romalis, F. Sabatie, G. Shapiro, J. Shaw, T.B. Smith, L. Sorrell, P.A. Souder, F. Staley, S.St. Lorant, L.M. Stuart, F. Suckane, Z.M. Szalata, Y. Terrien, A.K. Thompson, T. Toole, X. Wang, J.W. Watson, R.C. Welsh, F.R. Wesselmann, T. Wright, C.C. Young, B. Youngman, H. Yuta, W.-M. Zhang, and P. Zyla

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Scattering, media_common.quotation_subject, Structure function, Electron, Function (mathematics), Spin structure, 01 natural sciences, 7. Clean energy, Asymmetry, 0103 physical sciences, Neutron, Matrix element, 010306 general physics, media_common
Abstract

We have measured the neutron structure function g$_{2}^{n}$ and the virtual photon-nucleon asymmetry A$_{2}^{n}$ over the kinematic range $0.014\leq x \leq 0.7$ and $1.0 \leq Q^{2} \leq 17.0$ by scattering 48.3 GeV longitudinally polarized electrons from polarized $^{3}$He. Results for A$_{2}^{n}$ are significantly smaller than the $\sqrt{R}$ positivity limit over most of the measured range and data for g$_2^{n}$ are generally consistent with the twist-2 Wandzura-Wilczek prediction. Using our measured g$_{2}^{n}$ we obtain results for the twist-3 reduced matrix element $d_{2}^{n}$, and the integral $\int$g$_{2}^{n}(x)dx$ in the range $0.014\leq x \leq 1.0$. Data from this experiment are combined with existing data for g$_{2}^{n}$ to obtain an average for $d_{2}^{n}$ and the integral $\int$g$_{2}^{n}(x)dx$.

Published
1997
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3. Measurements of the Q2-dependence of the proton and deuteron spin structure functions g1 and g1

Author

A. Rijllart, J. Marroncle, Z. M. Szalata, J. Clendenin, T. Akagi, P. Raines, H. Dutz, T. J. Liu, Dinko Pocanic, H. R. Band, M. Kuriki, J. P. Chen, John C. Mitchell, S. E. Kuhn, B. Youngman, R. Prepost, S.St. Lorant, D. Walz, G. Court, Ingo Sick, Timothy B. Smith, J. Gomez, X.K. Maruyama, D. Kawall, K. Witte, L. M. Stuart, T. Maruyama, P. E. Bosted, P.L. Anthony, J. Fellbaum, C. Comptour, M. Daoudi, C. E. Hyde-Wright, R. Pitthan, D. Garvey, C. Y. Prescott, W. Meyer, Avraham Klein, R. A. Lindgren, G. G. Petratos, M. Spengos, F. Staley, L.S. Rochester, C. C. Young, T. L. Usher, B. Raue, S. Hoibraten, R. C. Minehart, D. Zimmermann, Pascal Steiner, H. Yuta, P. Grenier, K. A. Griffioen, Timothy Chupp, L. C. Smith, F. Suekane, J. Morgenstern, J. R. Johnson, G. H. Zapalac, Donal Day, Y. Roblin, D. G. Crabb, H. Tang, J. Button-Shafer, Koji Abe, J. A. Dunne, H. Fonvieille, H. Borel, J. S. McCarthy, F. S. Dietrich, T. Averett, R. G. Arnold, R. Erbacher, Z. E. Meziani, D. Reyna, R. A. Gearhart, A. Feltham, E. W. Hughes, J. L. White, J. M. Bauer, Vincent Breton, Kevin P. Coulter, O. Rondon, S. E. Rock, Y. Terrien, B. Zihlmann, Emil Frlez, R. Antonov, and R. M. Lombard-Nelsen

Subjects
Nuclear physics, Physics, High Energy Physics - Experiment (hep-ex), Nuclear and High Energy Physics, Deuterium, Proton, FOS: Physical sciences, Spin structure, High Energy Physics - Experiment
Abstract

The ratio g1/F1 has been measured over the range 0.031 (GeV/c)2. A trend is observed for g1/F1 to decrease at lower Q2. Fits to world data with and without a possible Q2-dependence in g1/F1 are in agreement with the Bjorken sum rule, but Delta_q is substantially less than the quark-parton model expectation., Comment: 16 pages, format is postscript file, gzip-ed, uuencode-ed

Published
1995
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4. Observation ofΛc+ decays to Λπ+π0, Σ0π+, Σ0π+π0, and Σ0π−π+π+

Author

P. Zadorozhny, F. Muheim, B. Nemati, F. Morrow, D. Besson, T. K. Nelson, P. S. Drell, S. Nakanishi, H. Kagan, E. H. Thorndike, D. N. Brown, S. Playfer, Jorge Luis Rodriguez, D. Riley, M. Saulnier, D. Coppage, S. F. Schaffner, J. Bartelt, J. P. Alexander, Anders Ryd, M. Athanas, K. Sparks, R. J. Morrison, Mats A Selen, H. A. Cho, A. J. Sadoff, D. He, Yuichi Kubota, D. Fujino, J. J. O'Neill, D. L. Hartill, M. Sapper, T. E. Browder, W. R. Ross, Daniel Schmidt, Richard Wilson, R. Kennett, R. Poling, C. R. Ng, Yurii V. Mukhin, M. S. Alam, B. Gittelman, I. Volobouev, Michael S. Witherell, G. C. Moneti, Marina Artuso, P. Wilson, A. J. Weinstein, J. Ernst, I. J. Kim, R. Stephens, G. Crawford, M. Lattery, J. Urheim, H. N. Nelson, S. E. Csorna, E. I. Shibata, P. Skubic, D. M. Coffman, B. K. Heltsley, N. Kwak, K. Kinoshita, Daniela Bortoletto, N. Copty, I. P.J. Shipsey, C. R. Sun, F. Butler, W. T. Ford, K. Cho, R. Malchow, D. Cinabro, R. D. Kass, R. Balest, N. B. Mistry, J. Whitmore, Jungil Lee, S. Menary, B. Geiser, John Yelton, J. Gronberg, S. Patton, N. Horwitz, R. L. McIlwain, M. Chadha, D. H. Miller, F. Shen, R. Davis, H. P. Paar, R. Fulton, Maurice Garcia-Sciveres, R. Ammar, G. Masek, V. Shelkov, S. Schrenk, M. Lohner, D. Acosta, Juliet Ritchie Patterson, J. Mevissen, Daniel Johnson, X. Fu, T. Liu, T. Skwarnicki, M. Daoudi, J. Kandaswamy, Sheldon Stone, S. Sanghera, H. Severini, S. Chan, C. Bebek, Paul Avery, D. L. Kreinick, M. L. Kelly, K. K. Gan, Y. Skovpen, P. C. Kim, S. Henderson, N. Hancock, D. Peterson, A. P. Freyberger, C. O'Grady, George R. Kalbfleisch, S. W. Gray, K. Honscheid, H. Tajima, Hubert Kroha, S. Roberts, J. Snow, Pu Wang, M. Modesitt, M. Battle, M. Sung, E. Nordberg, Jeffrey Richman, G. S. Ludwig, M. M. Zoeller, Karl Berkelman, J. G. Smith, D. G. Cassel, M. Ogg, G. Zhu, T. Miao, K. Lingel, M. Procario, S. Salman, Michael Wood, H. Worden, M. Lambrecht, A. Bean, J. K. Nelson, S. Yang, B. Ong, J. Fast, Christopher G. White, Z. Egyed, D. Sperka, Ruifang Wang, D. F. Cowen, P. L. Wang, C. M. Daubenmier, Ryszard Stroynowski, P. Rankin, Chunjie Wang, D. Perticone, V. Savinov, Yoram Rozen, F. Würthwein, Philip Baringer, S. Ball, J. S. Miller, M. Thulasidas, R. Ehrlich, N. Katayama, S. L. Jones, D. S. Akerib, J. Dominick, G. Eigen, R. Kutschke, H. Yamamoto, Ha Lam, G. Vasseur, B. C. Barish, J. Masui, Vivek Jain, C. D. Jones, and M. Goldberg

Subjects
Nuclear physics, Baryon, Physics, Nuclear and High Energy Physics, Argus, Particle physics, Branching fraction, Branching (polymer chemistry), computer, computer.programming_language
Abstract

We have observed the previously unseen decay modes Λπ+π0, Σ0π+π0 and Σ0π−π+π+ of the charmed baryon Λc+, as well as Λc+→Σ0π+ observed previously by ARGUS. The branching ratios for these four decay modes relative to Λc+→pK−π+ are measured to be 0.73 ±0.09± 0.16, 0.36 ±0.09±0.10, 0.21±0.05±0.05, and 0.21±0.02 ±0.04, respectively. Using the recent CLEO measurement of the branching ratio for Λc+→pK− π+, these modes account for 6% of Λc+ decays.

Published
1994
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5. A measurement of

Author

R. Davis, F. Butler, D. Fujino, D. Perticone, Yurii V. Mukhin, E. Nordberg, R. Malchow, J. Masui, M. S. Witherell, B. Gittelman, M. Lambrecht, H. Lam, J. J. O'Neill, Y. Kwon, S. Chan, Yoram Rozen, S. Nakanishi, C. O'Grady, P. Rankin, J. Dominick, G. Zhu, P. S. Drell, I. P.J. Shipsey, H. Kagan, V. Savinov, S. Menary, K. K. Gan, Y. Skovpen, James P. Alexander, M. Thulasidas, R. Ehrlich, D. He, C. R. Ng, G. Masek, B. Ong, P. L. Wang, J. Mevissen, C. M. Daubenmier, Ryszard Stroynowski, H. P. Paar, M. M. Zoeller, N. Katayama, H.N. Nelson, G. Vasseur, M. Selen, J. Gronberg, D. Acosta, T. K. Nelson, J. Kandaswamy, C. R. Sun, A. J. Sadoff, J. Urheim, K. W. Edwards, J. M. Yelton, H.A. Cho, George R. Kalbfleisch, Z. Egyed, R. Ammar, P. Gaiderev, S. Roberts, M. Daoudi, D. F. Cowen, R. J. Morrison, D. R. Johnson, T. Skwarnicki, A. Ryd, A. Bean, I. J. Kim, Vivek Jain, D. Riley, R. Mountain, P. Baringer, B. Geiser, M. Battle, Pu Wang, K. Honscheid, R. D. Kass, G. S. Ludwig, H. Yamamoto, D. Sperka, P. Avery, G. C. Moneti, George D Gollin, P. M. Patel, G. Crawford, J. Snow, P. Skubic, A. J. Weinstein, R. Kennett, J. R. Patterson, J. Rodriguez, D. G. Cassel, S. Yang, S. Sanghera, F. Würthwein, D. Coppage, E. I. Shibata, M. Chadha, T. Bergfeld, S. W. Gray, D. S. Akerib, Jungil Lee, M. Goldberg, D. Payne, D. Peterson, B. Barish, K. Cho, J. Fast, A. Freyberger, K. Berkelman, J. G. Smith, Christopher G. White, B. K. Heltsley, T. Liu, J. K. Nelson, M. Lattery, N. Kwak, Sheldon Stone, E. R.F. Hyatt, S. Henderson, B. I. Eisenstein, M.A. Palmer, E. H. Thorndike, C. Qiao, M. Ogg, G. Wei, S. L. Jones, R. Fulton, T. Miao, R. Kutschke, Jeffrey Richman, J. J. Thaler, William T. Ford, D. B. MacFarlane, Kenneth Bloom, N. Hancock, K. Lingel, R. Stephens, Chunjie Wang, T. E. Browder, N. B. Mistry, N. Horwitz, D. Besson, M. Kelly, J.S. Miller, H. Severini, S. Ball, Dave Britton, R. L. McIlwain, G. Eigen, M. S. Alam, V. Shelkov, P.C. Kim, Richard Wilson, N. Copty, Yuichi Kubota, J. Ernst, R. Poling, S. Schrenk, B. Nemati, P. Zadorozhny, F. Muheim, D. Cinabro, D. N. Brown, S. Playfer, W. R. Ross, C. Bebek, I. Volobouev, D. H. Miller, X. Fu, M. Saulnier, M. Sung, M. Lohner, S. E. Csorna, K. Kinoshita, S. Patton, J. Bartelt, D.L. Kreinick, M. Modesitt, D. L. Hartill, S. Salman, C. D. Jones, Michael Wood, M. Sapper, M. Garcia-Sciveres, R. Wang, M. Procario, D. M. Coffman, M. Athanas, R. Balest, Marina Artuso, and H. Tajima

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, symbols.namesake, Branching fraction, Electron–positron annihilation, symbols, Feynman diagram, B meson, Elementary particle, Branching (polymer chemistry)
Abstract

Using the CLEO II detector at CESR, we have measured the ratio of branching fractions B (D + S → φl + ν) B (D + S → φπ + ) = 0.54 ± 0.05 ± 0.04 . We use this measurement to obtain a model dependent estimate of B (D + S → φπ + ) .

Published
1994
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6. Study of the decay

Author

Juliet Ritchie Patterson, M. Modesitt, D. Payne, H. A. Cho, R. Wang, J. Gronberg, N. Horwitz, D. L. Hartill, R. Poling, C. R. Ng, G. Wei, Michael S. Witherell, D. M. Coffman, F. Butler, R. Malchow, T. Skwarnicki, John Yelton, M. Lambrecht, D. B. MacFarlane, A. J. Weinstein, B. K. Heltsley, M. S. Alam, D. He, J. G. Smith, P. M. Patel, M. Chadha, Jungil Lee, P. C. Kim, S. Henderson, Ha Lam, J. Ernst, G. Vasseur, T. E. Browder, H. N. Nelson, J. K. Nelson, D. Riley, E. R.F. Hyatt, D. H. Miller, C. Qiao, R. Mountain, N. Copty, Shengfeng Yang, T. K. Nelson, M. Lattery, D. Cinabro, D. Fujino, T. Liu, Y. Kwon, J. Bartelt, B. C. Barish, J. J. O'Neill, P. Zadorozhny, F. Muheim, C. Bebek, X. Fu, J. Masui, M. Sapper, D. Z. Besson, K. Lingel, S. Nakanishi, E. H. Thorndike, A. P. Freyberger, George R. Kalbfleisch, B. Nemati, F. Morrow, Yurii V. Mukhin, D. Acosta, D. F. Cowen, Yuichi Kubota, Anders Ryd, M. Athanas, P. Skubic, Daniel Johnson, M. Daoudi, D. Coppage, Maurice Garcia-Sciveres, Vivek Jain, M. L. Kelly, J. P. Alexander, M.A. Palmer, Richard Wilson, J. Snow, D. L. Kreinick, S. W. Gray, K. K. Gan, D. N. Brown, D. G. Cassel, P. N. Wang, Y. Skovpen, S. Sanghera, G. C. Moneti, K. Cho, R. Stephens, J. S. Miller, C. M. Daubenmier, S. Playfer, S. E. Csorna, I. P.J. Shipsey, M. Ogg, M. Procario, N. B. Mistry, K. Honscheid, R. Davis, George D Gollin, S. Roberts, G. Zhu, Ryszard Stroynowski, Alice Bean, M. Battle, B. I. Eisenstein, C. D. Jones, E. I. Shibata, H. P. Paar, R. Fulton, P. Rankin, M. Thulasidas, N. Hancock, K. Kinoshita, R. Kutschke, J. Mevissen, N. Kwak, S. Salman, J. Kandaswamy, Chunjie Wang, Michael Wood, H. Yamamoto, Marina Artuso, M. Goldberg, J. Urheim, S. Menary, E. Nordberg, Jeffrey Richman, Dave Britton, Jon J Thaler, R. L. McIlwain, Kenneth Bloom, D. Peterson, G. S. Ludwig, M. Sung, V. Shelkov, S. Schrenk, N. Katayama, D. S. Akerib, W. R. Ross, G. Eigen, I. Volobouev, H. Tajima, D. Perticone, Sheldon Stone, V. Savinov, Paul Avery, Daniel Schmidt, G. Crawford, C. R. Sun, W. T. Ford, H. Kagan, R. D. Kass, R. Balest, R. J. Morrison, Mats A Selen, A. J. Sadoff, Yoram Rozen, F. Würthwein, B. Geiser, M. Lohner, R. Kennett, B. Gittelman, I. J. Kim, Philip Baringer, P. S. Drell, Jorge Luis Rodriguez, M. Saulnier, S. Ball, R. Ehrlich, S. L. Jones, J. Dominick, D. Patton, Karl Berkelman, M. M. Zoeller, B. Ong, J. Fast, Christopher G. White, T. Miao, P. L. Wang, R. Ammar, H. Severini, S. Chan, K. W. Edwards, Z. Egyed, C. O'Grady, D. Sperka, T. Bergfeld, and G. Masek

Subjects
Nuclear physics, Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, Life span, Electron–positron annihilation, media_common.quotation_subject, Charm (quantum number), Asymmetry, Measure (mathematics), media_common
Abstract

Using the CLEO II detector at CESR we observe 500 Λ l + pairs consistent with the semileptonic decay Λc+ → λ+ν We measure σ(e + e − → Λ + c X) · B(Λ + c → Λ l + ν l ) = 4.77±0.25±0.66 pb . Combining with the charm semileptonic width and the lifetime of the Λc we also obtain B(Λ+c → pK−π+). We find no evidence for Λ l + ν l final states in which there are additional Λ+c decay products. We measure the decay asymmetry parameter of Λ+c → Λe+νe to be αΛc = −0.89+0.17+0.09−0.11−0.05.

Published
1994
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7. Search for exclusive b → u transitions in hadronic decays of B mesons involving mesons

Author

D. Riley, J. Bartelt, B. Nemati, F. Morrow, M. S. Alam, P. N. Wang, Yuichi Kubota, H. Kagan, J. S. Miller, C. D. Jones, D. He, J. Gronberg, S. Nakanishi, C. M. Daubenmier, Richard Wilson, J. Ernst, R. Davis, J. Urheim, T. E. Browder, E. H. Thorndike, M. M. Zoeller, Ryszard Stroynowski, T. Liu, M. Lattery, N. Horwitz, M. Chadha, C. Bebek, M. Thulasidas, Maurice Garcia-Sciveres, G. Masek, Juliet Ritchie Patterson, R. J. Morrison, D. Coppage, D. H. Miller, P. L. Wang, M. Goldberg, A. P. Freyberger, J. P. Alexander, Mats A Selen, Y. Kwon, B. Geiser, T. Miao, A. J. Sadoff, M. L. Kelly, George R. Kalbfleisch, N. Kwak, D. Z. Besson, S. W. Gray, Jungil Lee, H. P. Paar, C. R. Sun, D. L. Kreinick, X. Fu, P. Rankin, D. Perticone, R. Fulton, M. Daoudi, W. T. Ford, J. Masui, V. Savinov, F. Butler, R. D. Kass, M. Modesitt, T. K. Nelson, R. Balest, W. R. Ross, P. Skubic, M. Lohner, Yoram Rozen, F. Würthwein, R. Malchow, John Yelton, S. Menary, M. Lambrecht, J. Snow, Z. Egyed, H. Yamamoto, R. L. McIlwain, Anders Ryd, M. Athanas, K. K. Gan, Y. Skovpen, R. Kennett, J. K. Nelson, Vivek Jain, D. Sperka, Chunjie Wang, B. Gittelman, J. J. Thaler, V. Shelkov, S. Schrenk, S. Yang, Philip Baringer, J. G. Smith, Sheldon Stone, T. Bergfeld, S. Roberts, R. Stephens, Paul Avery, S. Sanghera, P. Zadorozhny, F. Muheim, I. Volobouev, S. Ball, S. E. Csorna, R. Ammar, R. Mountain, E. Nordberg, Jeffrey Richman, Daniel Schmidt, I. J. Kim, Kenneth Bloom, M. Battle, G. C. Moneti, N. Hancock, M. Procario, H. Severini, S. Chan, B. Ong, M.A. Palmer, Ha Lam, D. Fujino, G. S. Ludwig, M. Sapper, D. N. Brown, K. Kinoshita, J. J. O'Neill, S. Playfer, N. Katayama, G. Wei, D. G. Cassel, G. Zhu, D. S. Akerib, E. I. Shibata, G. Vasseur, S. Salman, J. Fast, D. Payne, H. A. Cho, R. Wang, C. O'Grady, Michael Wood, Marina Artuso, G. Eigen, A. J. Weinstein, Yurii V. Mukhin, B. C. Barish, Christopher G. White, D. L. Hartill, H. N. Nelson, P. S. Drell, Karl Berkelman, T. Skwarnicki, R. Ehrlich, R. Poling, D. F. Cowen, Jorge Luis Rodriguez, G. Crawford, M. Saulnier, C. R. Ng, S. L. Jones, P. C. Kim, S. Henderson, M. Sung, Michael S. Witherell, I. P.J. Shipsey, J. Dominick, B. I. Eisenstein, D. M. Coffman, K. Lingel, Alice Bean, K. Cho, R. Kutschke, N. B. Mistry, B. K. Heltsley, H. Tajima, G. D. Gollin, J. Mevissen, N. Copty, J. Kandaswamy, D. Cinabro, S. Patton, D. Peterson, D. Acosta, Daniel Johnson, and K. Honscheid

Subjects
Physics, Nuclear physics, Hadronic decay, Nuclear and High Energy Physics, Particle physics, Meson, Hadron, Mass spectrum, Resonance, Elementary particle, B meson, Cornell Electron Storage Ring
Abstract

Using 1.16 × 106 B B events collected at the γ(4S) resonance by the CLEO Collaboration at the Cornell Electron Storage Ring (CESR), we have searched for decays of B mesons to exclusive two-body hadronic final states including a Ds+ or a D s ∗+ meson. We obtain the 90% confidence level upper limit β (B → D s (∗)+ π − + D s ∗ +p − + D s (∗)+ π 0 + D s (∗)+ η + D s (∗)+ p 0 + D s (∗)+ (ω) × β(D s + → φπ + ) −5 . We have also searched for the W-exchange decays, B 0 → D s (∗)− K (∗)+ .

Published
1993
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8. Measurements of exclusive semileptonic decays of D mesons

Author

Daniel Schmidt, Maurice Garcia-Sciveres, M. Sapper, R. J. Morrison, Mats A Selen, A. J. Sadoff, F. Butler, P. N. Wang, John Yelton, Ryszard Stroynowski, Y. Kwon, P. Rankin, D. H. Miller, S. Nakanishi, E. H. Thorndike, B. Nemati, Chunjie Wang, M. Daoudi, A. Bean, X. Fu, D. Riley, M. Procario, J. K. Nelson, D. Besson, R. Kennett, S. Yang, S. F. Schaffner, B. Gittelman, Harris Kagan, N. Kwak, Daniela Bortoletto, Ha Lam, Raymond Davis, D. Coppage, D. F. Cowen, J. J. O'Neill, N. Copty, I. J. Kim, J. Bartelt, J. P. Alexander, G. C. Moneti, K. Lingel, T. Skwarnicki, G. Vasseur, J. Urheim, N. Katayama, D. S. Akerib, D. M. Coffman, G. Eigen, S. Salman, D. G. Cassel, Michael Wood, R. Kass, R. Stephens, Yurii V. Mukhin, S. E. Csorna, P. C. Kim, S. Henderson, B. K. Heltsley, B. C. Barish, B. Geiser, Yuichi Kubota, M. Sung, H. Worden, M. Modesitt, P. L. Wang, E. I. Shibata, K. Kinoshita, R. Malchow, H. A. Cho, R. Wang, M. Lohner, I. P.J. Shipsey, K. K. Gan, M. M. Zoeller, D. Cinabro, D. N. Brown, D. L. Hartill, Karl Berkelman, K. Cho, N. B. Mistry, B. Ong, P. Wilson, J. G. Smith, S. Menary, R. L. McIlwain, P. S. Drell, S. Patton, R. Poling, M. Lambrecht, F. Shen, C. R. Ng, T. Miao, G. Crawford, C. D. Jones, Jorge Luis Rodriguez, M. Saulnier, M. S. Alam, V. Shelkov, S. Schrenk, Michael S. Witherell, M. Goldberg, Richard Wilson, D. Fujino, D. Acosta, A. J. Weinstein, Daniel Johnson, J. Fast, W. R. Ross, H. N. Nelson, D. He, R. Ammar, D. L. Kreinick, G. Masek, T. K. Nelson, Juliet Ritchie Patterson, H. Tajima, J. Gronberg, J. Masui, N. Horwitz, J. Ernst, T. E. Browder, J. Lee, M. L. Kelly, R. Fulton, I. Volobouev, M. Lattery, M. Chadha, C. R. Sun, H. Severini, S. Chan, S. W. Gray, M. Ogg, G. Zhu, S. Roberts, W. T. Ford, P. Zadorozhny, M. Battle, F. Muheim, Z. Egyed, H. P. Paar, R. Balest, K. Honscheid, Hubert Kroha, C. O'Grady, S. Playfer, R. Kutschke, D. Sperka, Vivek Jain, F. Morrow, Y. Skovpen, S. Sanghera, E. Nordberg, Jeffrey Richman, Anders Ryd, M. Athanas, J. Mevissen, G. S. Ludwig, N. Hancock, P. Skubic, Sheldon Stone, J. Kandaswamy, K. Sparks, Paul Avery, D. Peterson, Marina Artuso, C. White, H. Yamamoto, T. Liu, C. Bebek, A. P. Freyberger, George R. Kalbfleisch, J. Snow, C. M. Daubenmier, D. Perticone, V. Savinov, Yoram Rozen, F. Würthwein, Philip Baringer, S. Ball, J. S. Miller, M. Thulasidas, J. Whitmore, R. Ehrlich, S. L. Jones, and J. Dominick

Subjects
Semileptonic decay, Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Branching fraction, Electron–positron annihilation, D meson, Elementary particle, Cornell Electron Storage Ring
Abstract

Using a sample of integrated luminosity 1.68 fb−1 collected with the CLEO-II detector at the Cornell Electron Storage Ring, we measure the branching ratios for the dominant exclusive semileptonic decays D → K l ν and D → K ∗ l ν , using charged and neutral D mesons. We also make a precise measurement of the vector form factor for the decay D 0 → K − l + ν , using a sample of 2700 events.

Published
1993
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9. Production and decay of the Ds1 (2536)+

Author

G. Masek, S. Nakanishi, Juliet Ritchie Patterson, E. H. Thorndike, K. Honscheid, M. Procario, W. R. Ross, D. Coppage, J. P. Alexander, C. R. Sun, W. T. Ford, I. P.J. Shipsey, J. S. Miller, Hubert Kroha, R. D. Kass, R. S. Galik, P. Rubin, M. Thulasidas, J. Masui, M. Worris, M. Ogg, G. Zhu, N. Katayama, Michael Wood, D. S. Akerib, C. O'Grady, A. J. Weinstein, M. Sapper, D. M. Coffman, H. A. Cho, R. Wang, T. K. Nelson, G. Eigen, B. K. Heltsley, H. N. Nelson, T. Skwarnicki, D. L. Hartill, R. Ehrlich, M. Daoudi, Vivek Jain, P. C. Kim, F. Butler, D. L. Kreinick, S. L. Jones, Maurice Garcia-Sciveres, S. Henderson, C. R. Ng, K. K. Gan, Y. Skovpen, B. Geiser, J. Mevissen, M. M. Zoeller, D. Perticone, V. Savinov, Michael S. Witherell, B. Nemati, F. Morrow, J. Kandaswamy, J. Urheim, Daniela Bortoletto, R. Malchow, K. Lingel, Yoram Rozen, F. Würthwein, M. Sivertz, N. Copty, J. Dominick, S. Roberts, R. Kutschke, Philip Baringer, John Yelton, M. L. Kelly, P. N. Wang, S. Ball, D. Besson, T. Miao, H. Worden, M. Battle, T. Liu, C. Bebek, D. Peterson, S. W. Gray, K. Sparks, D. G. Cassel, M. Modesitt, H. Tajima, H. Yamamoto, M. Lohner, M. Lambrecht, R. Ammar, A. P. Freyberger, Ryszard Stroynowski, H. P. Paar, R. Fulton, D. Cinabro, George R. Kalbfleisch, H. Severini, S. Chan, Ron Poling, Daniel Schmidt, S. Patton, J. G. Smith, Sheldon Stone, E. Nordberg, Jeffrey Richman, D. Acosta, Richard Wilson, Paul Avery, Daniel Johnson, G. S. Ludwig, P. Rankin, K. Cho, Marina Artuso, N. B. Mistry, J. Snow, Z. Egyed, D. Riley, J. J. O'Neill, Chunjie Wang, S. F. Schaffner, P. S. Drell, J. Bartelt, Paul Sheldon, Yuichi Kubota, Jorge Luis Rodriguez, D. F. Cowen, G. Crawford, M. Saulnier, S. Sanghera, A. Bean, D. Sperka, N. Hancock, R. Kennett, H. Kagan, B. Gittelman, V. Romero, J. K. Nelson, I. J. Kim, S. Yang, R. Davis, R. J. Morrison, Mats A Selen, A. J. Sadoff, Christopher G. White, P. L. Wang, M. Athanas, J. Gronberg, N. Horwitz, M. Chadha, Karl Berkelman, D. H. Miller, X. Fu, M. Sung, N. Kwak, R. Stephens, S. E. Csorna, C. D. Jones, S. Menary, K. Kinoshita, R. L. McIlwain, B. Ong, M. Goldberg, A. V. Barnes, S. Schrenk, Ha Lam, M. S. Alam, J. Whitmore, Jungil Lee, M. Lattery, G. Vasseur, F. Muheim, D. N. Brown, S. Playfer, B. C. Barish, G. C. Moneti, E. I. Shibata, R. Ballest, T. E. Browder, P. Wilson, and P. Skubic

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Fragmentation (mass spectrometry), Electron–positron annihilation, Fragmentation function, Parity (physics), Atomic physics, Helicity
Abstract

Using the CLEO-II detector at CESR, we have observed the Ds1(2536)+ in the decay modes D s1 + →D ∗0 K + and D ∗+ K S + , and measured its fragmentation and production ratios. Using the helicity angle distribution of the daugter D ∗0 , we obtain new evidence for the assignment of 1+ for the spin and parity of the Ds1+. We also set upper limits on the decays D s1 + →D s ∗+ λ, D 0 K + and D+Ks0.

Published
1993
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10. Study of χc2 production in photon-photon collisions

Author

A. R. Clark, D. E. Pellet, William A. Wenzel, D. J. Lambert, S. C. Loken, G. Masek, B. C. Shen, J. Lys, J. J. Eastman, Ronald R. Ross, K. T. Knöpfle, S. J. Yellin, G. S. Greenbaum, R. L. Holtzapple, M. K. Sullivan, C. Zeitlin, H. H. Bingham, W. Vernon, D. O. Caldwell, D. A. Bauer, J. M. Hauptman, S. Khacheryan, J. G. Layter, E. M. Wang, S. B. Chun, K. H. Fairfield, G. Lynch, M. G. Strauss, C. D. Buchanan, Werner Hofmann, M. T. Ronan, A. P.T. Palounek, H. Yamamoto, N. A. Nicol, M. L. Stevenson, R. C. Berg, W. T. Lin, A. M. Eisner, A. Lu, Y. T. Oyang, Orin I. Dahl, H. Marsiske, George P Yost, D. R. Nygren, R. R. Kofler, G. Zapalac, M. Daoudi, G. Godfrey, R. Belcinski, H. P. Paar, Y. X. Wang, Gilbert Shapiro, R. W. Stephens, E. S. Miller, and R. J. Madaras

Subjects
Quantum chromodynamics, Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Photon, Meson, law, Elementary particle, State (functional analysis), Collider, law.invention, Lepton
Abstract

Two-photon production of the charmonium state χ c has been studied by the TPC/Two-Gamma experiment at the SLAC e + e − collider PEP. We observe evidence of the χ c 2 state in the channel γγ → χ c 2 , χ c 2 → γJ / ψ , J / ψ → l + l − and obtain a value of Γ γγ ( χ c 2 )=3.4±1.7±0.9 keV. This is the first observation of the two-photon production of a χ c state. Comparison is made with previous experimental results and QCD predictions for Γ γγ ( χ c 2 ).

Published
1993
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11. Exclusive χ(2P) production in ϒ(3S) decay

Author

H. P. Paar, R. Fulton, T. Liu, C. Bebek, A. P. Freyberger, George R. Kalbfleisch, Ha Lam, J. D. Richman, Christopher G. White, K. K. Gan, T. Skwarnicki, J. Snow, E. Nordberg, K. Sparks, G. S. Ludwig, P. C. Kim, S. Henderson, B. Nemati, B. C. Barish, J. Masui, M. Goldberg, G. C. Moneti, M. Worris, F. Morrow, J. J. O'Neill, N. Hancock, Richard Wilson, D. Besson, P. L. Wang, Vivek Jain, T. E. Browder, M. Modesitt, Marina Artuso, Z. Egyed, D. Sperka, Ruifang Wang, Sheldon Stone, Paul Avery, M. Daoudi, P. Wilson, K. Lingel, M. Sivertz, R. Kennett, G. Zhu, J. Mevissen, C. D. Jones, F. Butler, D. N. Brown, S. Playfer, J. Kandaswamy, I. P.J. Shipsey, H. Worden, T. Letson, B. Ong, D. Riley, D. H. Miller, P. Skubic, D. G. Cassel, R. Malchow, John Yelton, J. Whitmore, Jungil Lee, N. Kwak, J. Urheim, C. R. Sun, J. G. Smith, W. T. Ford, R. Ammar, S. F. Schaffner, J. Bartelt, M. D. Mestayer, R. D. Kass, B. Gittelman, K. Honscheid, M. Lambrecht, X. Fu, D. L. Hartill, C. O'Grady, S. Menary, H. Severini, Daniel Schmidt, R. L. McIlwain, D. Peterson, P. N. Wang, A. V. Barnes, S. Schrenk, Paul Sheldon, Yuichi Kubota, H. Tajima, Karl Berkelman, A. J. Weinstein, H. N. Nelson, I. J. Kim, H. Yamamoto, M. S. Alam, M. Sapper, M. L. Kelly, J. Ernst, Elliott Cheu, M. Lattery, S. W. Gray, M. Procario, G. Crawford, H. Kagan, R. Davis, D. F. Cowen, R. Stephens, S. E. Csorna, E. I. Shibata, Daniela Bortoletto, S. Nandi, M. M. Zoeller, K. Kinoshita, R. J. Morrison, Mats A Selen, A. J. Sadoff, T. Miao, M. Sung, V. Romero, B. Geiser, J. K. Nelson, Ryszard Stroynowski, N. B. Mistry, M. Lohner, P. Rankin, N. Horwitz, M. Chadha, Chunjie Wang, P. S. Drell, Maurice Garcia-Sciveres, Jorge Luis Rodriguez, M. Saulnier, J. S. Miller, E. H. Thorndike, P. Rubin, M. Thulasidas, D. Coppage, J. P. Alexander, R. Ehrlich, S. Ro, R. S. Galik, D. Perticone, Yoram Rozen, F. Würthwein, W. M. Yao, Philip Baringer, S. Ball, N. Katayama, D. S. Akerib, G. Eigen, D. Cinabro, S. Patton, D. Acosta, Daniel Johnson, D. L. Kreinick, J. Dominick, S. Roberts, M. Battle, D. M. Coffman, B. K. Heltsley, R. Poling, C. R. Ng, Michael S. Witherell, G. Masek, Juliet Ritchie Patterson, and Hubert Kroha

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Photon, Branching fraction, Radiative transfer, Radiative decay, Elementary particle, Lepton
Abstract

Using the CsI calorimeter of the CLEO-II detector, we have studied exclusive radiative decays of the ϒ(3S) to the χ (2P) states where the final state consists of two photons and two leptons (e + e − or μ + μ − , from either the ϒ(1S) or ϒ(2S)). We observe and measure branching ratios for the J =2 and J =1 χ b (2 3 P J ) states, and set upper limits for the J =0 state.

Published
1992
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12. A measurement of the tau lepton lifetime

Author

E. H. Thorndike, R. Ammar, F. M. Pipkin, D. Coppage, A. M. Halling, J. P. Alexander, K. Lingel, M. Sivertz, J. S. H. Lee, K. Sparks, Paul Sheldon, G. Zhu, Marina Artuso, Harris Kagan, M. Worris, H. Worden, R. S. Galik, J. S. Miller, S. Playfer, C. P. O'Grady, J. Wolinski, P. L. Wang, Ian Shipsey, F. Muheim, J. J. Whitmore, K. K. Gan, M. Thulasidas, P. Rubin, R. J. Morrison, Mats A Selen, J. L. Rodriguez, D. L. Kreinick, C. Bebek, H. Tajima, David Sperka, F. Morrow, A. J. Sadoff, S. R. Ro, Frank Würthwein, D. R. Johnson, D. L. Hartill, S. Menary, H. N. Nelson, Paul Wilson, R. Ehrlich, D. Xiao, Daniel Schmidt, Paul Avery, N. B. Mistry, Z. Egyed, T. E. Browder, K. Honscheid, D. Z. Besson, D. Riley, M. Kelly, M. Daoudi, J. Mevissen, T. Liu, M. Modesitt, J. Dominick, J. Kandaswamy, N. Copty, A. Silverman, J. Gronberg, J. A. Ernst, H. P. Paar, R. Fulton, S. W. Gray, P. Skubic, W. M. Yao, A. P. Freyberger, T. Skwarnicki, D. Peterson, Elliott Cheu, Glen D. Crawford, J. D. Lewis, H. Yamamoto, P. C. Kim, J. Urheim, B. Ong, D. Perticone, Sheldon Stone, Shawn W. Henderson, M. Goldberg, D. M. Coffman, G. C. Moneti, R. Wang, Yoram Rozen, M. Lambrecht, E. Nordberg, X. Fu, D. F. Cowen, B. K. Heltsley, T. Miao, S.F. Schaffner, Cong Wang, B. Nemati, G. S. Ludwig, Daniela Bortoletto, Philip Baringer, J. Snow, M. Garcia-Sciveres, C. D. Jones, S. Ball, R. J. Wilson, Vipul Jain, M. Battle, A. J.R. Weinstein, John Yelton, N. Katayama, N. Hancock, Ryszard Stroynowski, D. S. Akerib, P. Rankin, G. Eigen, David Norvil Brown, Yuichi Kubota, John E. Bartelt, G.R. Kalbfleisch, M. Sapper, T. Jensen, J. K. Nelson, Soumitra Nandi, M. M. Zoeller, J. G. Smith, R. L. Malchow, Christopher G. White, C. R. Sun, W. T. Ford, R. D. Kass, Alice Bean, Raymond Davis, Wei Li, D. H. Miller, R. Stephens, S. E. Csorna, F. Butler, K. Kinoshita, Pu Wang, Darin Acosta, G. Masek, Juliet Ritchie Patterson, M. Procario, Horst Severini, E. I. Shibata, Hubert Kroha, C. R. Ng, Michael S. Witherell, M.K. Sung, N. Kwak, R. L. McIlwain, Alam, P. Haas, N. Horwitz, M. Chadha, A.V. Bernes, Robert K. Kutschke, M. Pisharody, Karl Berkelman, T. Letson, Ha Lam, J. D. Richman, V. Romero, M. Lattery, B. C. Barish, J. Masui, S. Schrenk, Mestayer, S. Roberts, D. G. Cassel, R. Poling, D. Cinabro, R. Kennett, B. Gittelman, I. J. Kim, P. S. Drell, M. Saulnier, B. Geiser, M. Lohner, and J. J. O'Neill

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Lepton
Published
1992
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13. Observation of the decay

Author

S. Henderson, K. Kinoshita, F. Pipkin, M. Saulnier, R. Wilson, J. Wolinski, D. Xiao, H. Yamamoto, A.J. Sadoff, R. Ammar, P. Baringer, D. Coppage, R. Davis, M. Kelly, N. Kwak, H. Lam, S. Ro, Y. Kubota, M. Lattery, J.K. Nelson, D. Perticone, R. Poling, S. Schrenk, R. Wang, M.S. Alam, I.J. Kim, J.J. O'Neill, B. Nemati, V. Romero, H. Severini, C.R. Sun, P.-N. Wang, M.M. Zoeller, G. Crawford, R. Fulton, K.K. Gan, H. Kagan, R. Kass, J. Lee, R. Malchow, F. Morrow, M.K. Sung, J. Whitmore, P. Wilson, F. Butler, X. Fu, G. Kalbfleisch, M. Lambrecht, P. Skubic, J. Snow, P.-L. Wang, D. Bortoletto, D.N. Brown, J. Dominick, R.L. McIlwain, D.H. Miller, M. Modesitt, E.I. Shibata, S.F. Schaffner, I.P.J. Shipsey, M. Battle, J. Ernst, H. Kroha, S. Roberts, K. Sparks, E.H. Thorndike, C.-H. Wang, R. Stroynowski, M. Artuso, M. Goldberg, T. Haupt, N. Horwitz, R. Kennett, G.C. Moneti, S. Playfer, Y. Rozen, P. Rubin, T. Skwarnicki, S. Stone, M. Thulasidas, W.-M. Yao, G. Zhu, A.V. Barnes, J. Bartelt, S.E. Csorna, V. Jain, T. Letson, M.D. Mestayer, D.S. Akerib, B. Barish, D.F. Cowen, G. Eigen, J. Urheim, A.J. Weinstein, R.J. Morrison, H. Tajima, D. Schmidt, D. Sperka, M. Procario, M. Daoudi, W.T. Ford, D.R. Johnson, K. Lingel, M. Lohner, P. Rankin, J.G. Smith, J. Alexander, C. Bebek, K. Berkelman, D. Besson, T.E. Browder, D.G. Cassel, E. Cheu, D.M. Coffman, P.S. Drell, R. Ehrlich, R.S. Galik, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S.W. Gray, D.L. Hartill, B.K. Heltsley, K. Honscheid, C. Jones, J. Kandaswamy, N. Katayama, P.C. Kim, D.L. Kreinick, G.S. Ludwig, J. Masui, J. Mevissen, N.B. Mistry, S. Nandi, C.R. Ng, E. Nordberg, C. O'Grady, J.R. Patterson, D. Peterson, D. Riley, M. Sapper, M. Selen, H. Worden, M. Worris, F. Würthwein, P. Avery, A. Freyberger, J. Rodriguez, and J. Yelton

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Experiment, Signal
Abstract

CLEO has observed a signal corresponding to the previously unseen decay ξ c 0 →Ω − K + . The observation of this decay mod points to W-exchange diagrams being an important contributor to the decays of the ξc0.

Published
1992
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14. First measurement of the double-inclusive B/B hadron energy distribution in e+e− annihilations, and of angle-dependent moments of the B and B energies

Author

J. L. Wittlin, I. Adam, K. T. Flood, S. Walston, K. G. Baird, J. Va'vra, H. Akimoto, L.S. Rochester, H. Yuta, J. M. Bauer, O. H. Saxton, A. W. Weidemann, T. L. Usher, J.J. Reidy, J. Schwiening, F. E. Taylor, C. H. Park, Bruce Schumm, H. R. Band, J. P. Fernandez, R. R. Kofler, M.E. Huffer, J. R. Bogart, V. Lia, D. L. Burke, M. R. Convery, I. Erofeeva, S. Manly, R. Berger, W. M. Bugg, N. B. Sinev, A. P. Waite, M. Morii, J. A. Jaros, G. Bellodi, G. Nesom, A. Suzuki, G. R. Bower, S. Willocq, R. Dubois, N. De Groot, G. Blaylock, H. M. Steiner, Gilbert Shapiro, H. Staengle, S. S. Hertzbach, T. Schalk, R. Messner, T. Maruyama, R. Verdier, P. N. Burrows, C. Y. Prescott, E. L. Hart, C.S. Lin, M. Kalelkar, K. Hasuko, E. R. Weiss, V. Eschenburg, D. Su, G. Mancinelli, P. C. Rowson, G. Crawford, I. M. Peruzzi, H. J. Kang, D. Aston, V.V. Serbo, D. J. Jackson, R. E. Cassell, E. Etzion, W. J. Wisniewski, M. Piccolo, S. Narita, F. Suekane, X. Huynh, T. H. Burnett, S. J. Yellin, J. J. Russell, Achim Stahl, D.L. Wagner, Dominik Müller, R. Cowan, R. Frey, L.S. Osborne, Kenji Abe, U. Nauenberg, Giancarlo Mantovani, S. Fahey, J. S. Whitaker, N. Oishi, T. Abe, M. Doser, E. Torrence, J. R. Johnson, R. Kajikawa, M. Iwasaki, C. Baltay, D. N. Dong, C.J.S. Damerell, R. J. Wilson, P.L. Reinertsen, J. A. Snyder, D. Onoprienko, R. Prepost, Martin Breidenbach, P.F. Jacques, Zihao Jiang, M. Daoudi, A. Sugiyama, V. Murzin, A. Chou, M. Woods, A. K. McKemey, K.C. Moffeit, D. W. G. S. Leith, L. Piemontese, H. O. Cohn, R.J. Plano, T. B. Moore, Thomas W. Markiewicz, B. N. Ratcliff, P. E. Stamer, C. C. Young, Koya Abe, J. Yashima, R. Kroeger, J. E. Brau, M. Langston, S. H. Williams, Timothy Barklow, A. Calcaterra, A. S. Johnson, T. R. Wright, H. A. Neal, R. K. Yamamoto, R. S. Panvini, D. Falciai, J. Thom, J. A. Coller, Melody A. Swartz, V. Cook, and R. de Sangro

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, FOS: Physical sciences, Order (ring theory), Perturbative QCD, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Production (computer science), High Energy Physics::Experiment, Ansatz, Bar (unit)
Abstract

We have made the first measurement of the double-inclusive B/Bbar energy distribution in e+e- annihilations, using a sample of 400,000 hadronic Z0 decay events recorded in the SLD experiment at SLAC between 1996 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector were used to reconstruct B/Bbar decay vertices with high efficiency and purity, and to provide measurements of the kinematic quantities used to calculate the B energies in this novel technique. We measured the B/Bbar energies with good efficiency and resolution over the full kinematic range. We measured moments of the scaled energies of the B and Bbar hadrons vs. the opening angle between them. By comparing these results with perturbative QCD predictions we tested the ansatz of factorisation in heavy-quark production. A recent next-to-leading order calculation reproduces the data., Comment: 17 pages, 6 figures; submitted to Physics Letters B

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