Theoretical Aspects of Inclusive Light-Hadron Production
Abstract
We summarize the key results of a recent global analysis of inclusive single-charged-hadron production in high-energy colliding-beam experiments. In the framework of the parton model of quantum chromodynamics at next-to-leading order (NLO), fragmentation functions (FFs) for charged pions, charged kaons, and (anti) protons are extracted from experimental data of e^+e^- annihilation at the Z-boson resonance and at centre-of-mass energy root(s) = 29 GeV. This fit also yields a new NLO value for the strong-coupling constant, namely alpha_s^(5)(M_Z) = 0.1170 +- 0.0073. The scaling violations encoded in the FFs through the Altarelli-Parisi evolution equations are tested by confronting (e^+e^-)-annihilation data from DESY DORIS, DESY PETRA, and CERN LEP2 with NLO predictions based on these FFs. Comparisons of p p-bar data from CERN S p p-bar S and the Fermilab Tevatron, gamma p data from DESY HERA, and gamma gamma data from LEP2 with the corresponding NLO predictions allow us to test the universality of the FFs predicted by the factorization theorem.
Keywords
Cite
@article{arxiv.hep-ph/0101198,
title = {Theoretical Aspects of Inclusive Light-Hadron Production},
author = {Bernd A. Kniehl},
journal= {arXiv preprint arXiv:hep-ph/0101198},
year = {2010}
}
Comments
12 pages (Latex), 7 figures (Postscript); to appear in the proceedings of the symposium "50 Years of Electroweak Physics" in honor of Professor Alberto Sirlin's 70th birthday, New York University, October 27 - 28, 2000, edited by M. Porrati