Results 51 to 60 of about 68,067 (147)

Study of Gluon versus Quark Fragmentation in $\Upsilon\to gg\gamma$ and $e^{+}e^{-}\to q\bar{q}\gamma$ Events at \sqrt{s}=10 GeV

, 1997
Using data collected with the CLEO II detector at the Cornell Electron Storage Ring, we determine the ratio R(chrg) for the mean charged multiplicity observed in Upsilon(1S)->gggamma events, to the mean charged multiplicity observed in e+e- -> qqbar ...
A. Anastassov, A. Bean, A. Bellerive, A. D. Foland, A. Efimov, A. Freyberger, A. H. Mahmood, A. J. Sadoff, A. J. Weinstein, A. Ryd, A. Smith, A. Soffer, A. Undrus, A. Wolf, B. Barish, B. E. Berger, B. Gittelman, B. H. Behrens, B. I. Eisenstein, B. K. Heltsley, B. Nemati, C. Bebek, C. D. Jones, C. Darling, C. O’ Grady, C. P. Jessop, C. Prescott, C. Qiao, C. R. Ng, C. Ward, D. B. MacFarlane, D. Besson, D. Buskulic, D. Cinabro, D. Coppage, D. Fujino, D. G. Cassel, D. Gibaut, D. H. Miller, D. He, D. J. Lange, D. L. Hartill, D. L. Kreinick, D. M. Asner, D. M. Coffman, D. Peterson, D. Riley, D. Roberts, D. S. Crowcroft, D. Ugolini, D. W. Bliss, D. Y.-J. Kim, E. D. Malaza, E. D. Malaza, E. Gerndt, E. H. Thorndike, E. I. Shibata, E. Johnson, E. Nordberg, F. A. Berends, F. Frasconi, F. Li, F. Wappler, F. Würthwein, G. Alexander, G. Alexander, G. Arnison, G. Bonvicini, G. Brandenburg, G. C. Moneti, G. D. Gollin, G. E. Gladding, G. Eigen, G. Masek, G. S. Ludwig, G. Viehhauser, H. A. Cho, H. Kagan, H. Marsiske, H. N. Nelson, H. P. Paar, H. Park, H. Severini, H. Tajima, H. Yamamoto, I. C. Lai, I. Karliner, I. Korolkov, I. Kravchenko, I. M. Dremin, I. M. Dremin, I. Narsky, I. P. J. Shipsey, I. Volobouev, J. Bartelt, J. D. Richman, J. E. Duboscq, J. Ernst, J. Fast, J. G. Smith, J. Gronberg, J. J. O’Neill, J. J. Thaler, J. Kandaswamy, J. L. Rodriguez, J. Lee, J. Masui, J. Mevissen, J. P. Alexander, J. R. Patterson, J. Roy, J. S. Miller, J. Staeck, J. Urheim, J. W. Hinson, J. William Gary, J. Ye, J. Yelton, J. Zheng, K. Berkelman, K. Bloom, K. Cho, K. Honscheid, K. K. Gan, K. Kinoshita, K. Konishi, K. Lingel, K. M. Ecklund, K. W. Edwards, K. W. McLean, L. Gibbons, L. P. Perera, M. A. Marsh, M. Artuso, M. Athanas, M. B. Spencer, M. Bishai, M. Chadha, M. Dickson, M. Gao, M. Goldberg, M. L. Perl, M. Lattery, M. Lohner, M. M. Zoeller, M. Ogg, M. Palmer, M. S. Alam, M. S. Witherell, M. Schmidtler, M. Selen, M. Sivertz, M. Sung, M. Wood, M. Yurko, N. B. Mistry, N. Hancock, N. Katayama, N. Kwak, N. Menon, P. Abreu, P. Avery, P. Baringer, P. C. Kim, P. D. Acton, P. Gaidarev, P. I. Hopman, P. M. Patel, P. Pomianowski, P. Rankin, P. S. Drell, P. Skubic, Paul Hoyer, R. A. Briere, R. Akers, R. Ammar, R. Balest, R. Davis, R. Ehrlich, R. Elia, R. Fulton, R. Godang, R. Greene, R. J. Morrison, R. Janicek, R. Kass, R. Kutschke, R. M. Hans, R. Mountain, R. Poling, R. S. Galik, R. Stroynowski, R. Wang, R. Wanke, R. Wilson, S. Alam, S. Anderson, S. B. Athar, S. Bethke, S. Blinov, S. Chan, S. D. Johnson, S. E. Csorna, S. F. Schaffner, S. J. Brodsky, S. J. Richichi, S. Kopp, S. Kotov, S. L. Jones, S. Marka, S. Menary, S. Nakanishi, S. Patton, S. Roberts, S. Schrenk, S. Schuh, S. Stone, S. Timm, S. W. Gray, S. Yang, T. Bergfeld, T. E. Browder, T. E. Coan, T. Hart, T. K. Nelson, T. Lee, T. Riehle, T. Skwarnicki, V. Fadeyev, V. Jain, V. Savinov, V. Shelkov, W. R. Ross, W. S. Brower, W. T. Ford, X. Xing, X. Zhou, Y. Kubota, Y. Kubota, Y. Kwon, Y. Li, Y. Liu, Y. Maravin, Y. Mukhin, Y. S. Gao, Z. Fodor, Z. Ling   +246 more
core   +1 more source

A Study of Event Shapes and Determinations of alpha_s using data of e^+e^- Annihilations at sqrt{s} = 22 to 44 GeV

, 1997
Data recorded by the JADE experiment at the PETRA e^+e^- collider were used to measure the event shape observables thrust, heavy jet mass, wide and total jet broadening and the differential 2-jet rate in the Durham scheme.
Bethke, S., Biebel, O., Collaboration, the JADE, Fernández, P. A. Movilla, Kluth, S., Pfeifenschneider, P.   +5 more
core   +1 more source

Eleven Years of QCD at LEP

, 2001
Studies of hadronic final states of $e^+e^-$ annihilations, observed at the Large Electron Positron Collider LEP at CERN, are reviewed. The topics included cover measurements of $\alpha_s$, hadronic event shapes and hadronisation studies, tests of ...
Bethke, Siegfried
core   +1 more source

Localized $4\sigma$ and $5\sigma$ Dijet Mass Excesses in ALEPH LEP2 Four-Jet Events

, 2018
We investigate an excess observed in hadronic events in the archived LEP2 ALEPH data. This excess was observed at preselection level during data-MC comparisons of four-jet events when no search was being performed. The events are clustered into four jets
Kile, Jennifer, von Wimmersperg-Toeller, Julian   +1 more
core   +1 more source

Data Preservation in High Energy Physics - why, how and when?

, 2010
Long-term preservation of data and software of large experiments and detectors in high energy physics is of utmost importance to secure the heritage of (mostly unique) data and to allow advanced physics (re-)analyses at later times.
Altarelli, Bethke, Bethke, Gehrmann, Gehrmann-De Ridder, Gross, Kluth, Naroska, Politzer, Siegfried Bethke, Voss   +10 more
core   +1 more source

Power Corrections in Electron-Positron Annihilation: Experimental Review [PDF]

, 2006
Experimental studies of power corrections with e+e- data are reviewed. An overview of the available data for jet and event shape observables is given and recent analyses based on the Dokshitzer-Marchesini-Webber (DMW) model of power corrections are ...
Kluth, Stefan
core   +1 more source

The structure of the photon and its interactions [PDF]

, 1998
The OPAL experiment at LEP has performed a variety of measurements of photon-photon and electron-photon scattering at the electron-positron collider LEP to gain a deeper insight into the structure of the photon and its interactions.
Surrow, Bernd
core   +1 more source

Tests of Power Corrections to Event Shape Distributions from e+e- Annihilation [PDF]

, 1999
A study of differential event shape distributions using e+e- data at centre-of-mass energies of 35 to 183 GeV is presented. We investigated non-perturbative power corrections for the thrust, C-parameter, total and wide jet broadening observables.
Bethke, S., Biebel, O., Fernández, P. A. Movilla   +2 more
core   +1 more source

Study of moments of event shapes in e+e- annihilation using JADE data

, 2004
Data from e+e- annihilation into hadrons collected by the JADE experiment at centre-of-mass energies between 14 GeV and 44 GeV were used to study moments of event shape distributions.
Bethke, S., Collaboration, the JADE, Fernandez, P. A. Movilla, Kluth, S., Pahl, C., Schieck, J.   +5 more
core  

Measurement of the Strong Coupling Constant alpha_S from the Four-Jet Rate in e+e- Annihilation using JADE data

, 2004
Data from e+e- annihilation into hadrons collected by the JADE experiment at centre-of-mass energies between 14 GeV and 44 GeV were used to study the four-jet rate as a function of the Durham algorithm's resolution parameter y_cut.
Bethke, S., Collaboration, the JADE, Fernandez, P. A. Movilla, Kluth, S., Pahl, C., Schieck, J.   +5 more
core