Author: Paul Douglas Sheldon
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
Book Description
Comparison of Three-jet and Radiative Two-jet Events in Electron-positron Annihilation at 29 GeV
Author: Paul Douglas Sheldon
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
Book Description
Comparison of Three-jet and Radiative Two-jet Events in Electron-positron Annihilation at 29 GeV.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
By comparing 3-jet (ee− .-->. q anti q g) and radiative 2-jet (ee− .-->. q anti q .gamma.) events from electron-positron annihilation, we have studied the local and global effects of the presence of a hard bremsstrahlung gluon in hadronic events. Detector and event selection efficiencies and biases affect these two kinds of events almost equally because they have very similar kinematics and topologies. Accurate comparisons of q anti q g and q anti q .gamma. events can therefore be made. Globally, we observe a depletion of hadrons in q anti q g events relative to q anti q .gamma. events on the opposite side of the event plane from the gluon, in the angular region between the q and anti q jets. This depletion is shown to be in agreement with the predictions of Quantum Chromodynamics (QCD). The existence of this effect demonstrates that the presence of a gluon significantly alters the color forces and hence the fragmentation process in hadronic events. We also use these q anti q .gamma. and q anti q g events to compare low energy (4.5 GeV) gluon and quark jets. Our data indicate that gluon jets have softer x/sub p/ distributions than quark jets, while the transverse momentum distributions of these two types of jets are identical within our errors. Although we are unable to determine if the multiplicities of gluon (n/sub /) and quark (n/sub q/) jets are different, the ratio n/sub g//n/sub q/ = 9/4 predicted asymptotically in QCD would not be consistent with our data.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
By comparing 3-jet (ee− .-->. q anti q g) and radiative 2-jet (ee− .-->. q anti q .gamma.) events from electron-positron annihilation, we have studied the local and global effects of the presence of a hard bremsstrahlung gluon in hadronic events. Detector and event selection efficiencies and biases affect these two kinds of events almost equally because they have very similar kinematics and topologies. Accurate comparisons of q anti q g and q anti q .gamma. events can therefore be made. Globally, we observe a depletion of hadrons in q anti q g events relative to q anti q .gamma. events on the opposite side of the event plane from the gluon, in the angular region between the q and anti q jets. This depletion is shown to be in agreement with the predictions of Quantum Chromodynamics (QCD). The existence of this effect demonstrates that the presence of a gluon significantly alters the color forces and hence the fragmentation process in hadronic events. We also use these q anti q .gamma. and q anti q g events to compare low energy (4.5 GeV) gluon and quark jets. Our data indicate that gluon jets have softer x/sub p/ distributions than quark jets, while the transverse momentum distributions of these two types of jets are identical within our errors. Although we are unable to determine if the multiplicities of gluon (n/sub /) and quark (n/sub q/) jets are different, the ratio n/sub g//n/sub q/ = 9/4 predicted asymptotically in QCD would not be consistent with our data.
Energy Research Abstracts
Theory of Jets in Electron-Positron Annihilation
Author: G. Kramer
Publisher: Springer
ISBN: 3540388214
Category : Science
Languages : en
Pages : 148
Book Description
Publisher: Springer
ISBN: 3540388214
Category : Science
Languages : en
Pages : 148
Book Description
Energy Research Abstracts
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 900
Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 900
Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
High Energy Physics Index
Physics Briefs
Hard Photon Processes in Electron-positron Annihilation at 29 GeV
ERDA Energy Research Abstracts
Government Reports Annual Index
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1100
Book Description
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1100
Book Description