Strong Coupling Constant from Scaling Violations in Fragmentation Functions

Autor: Björn Pötter, Gustav Kramer, Bernd A. Kniehl
Rok vydání: 2000
Předmět:
Particle physics
Electron–positron annihilation
FOS: Physical sciences
General Physics and Astronomy
annihilation [electron positron]
fragmentation function
High Energy Physics - Experiment
electroproduction [hadron]
Nuclear physics
High Energy Physics - Experiment (hep-ex)
High Energy Physics - Phenomenology (hep-ph)
Pion
charged particle [K]
Fragmentation (mass spectrometry)
interpretation of experiments [numerical calculations]
ddc:550
Fragmentation function
inclusive reaction [electron positron]
violation [scaling]
Nuclear Experiment
Scaling
Physics
Annihilation
Large Hadron Collider
High Energy Physics::Phenomenology
x-dependence [differential cross section]
High Energy Physics - Phenomenology
Strong coupling
Physics::Accelerator Physics
High Energy Physics::Experiment
coupling constant [strong interaction]
charged particle [pi]
91.2 GeV-cms [29.0]
Zdroj: Physical review letters 85(25), 5288-5291 (2000). doi:10.1103/PhysRevLett.85.5288
ISSN: 1079-7114
0031-9007
DOI: 10.1103/physrevlett.85.5288
Popis: We present a new determination of the strong coupling constant alpha_s through the scaling violations in the fragmentation functions for charged pions, charged kaons, and protons. In our fit we include the latest e+e- annihilation data from CERN LEP1 and SLAC SLC on the Z-boson resonance and older, yet very precise data from SLAC PEP at center-of-mass energy sqrt(s)=29 GeV. A new world average of alpha_s is given.
Comment: 10 pages, 3 eps figues
Databáze: OpenAIRE
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