PreprintarXiv licencearXiv
alpha_s from hadron multiplicities: an updated analysis
Abstract
Exploring the anomalous dimensions, resummed through next-to-next-to-leading-logarithmic order, we study the first Mellin moments D_{q,g}(μ^2) of the quark and gluon fragmentation functions, which correspond to the average hadron multiplicities in jets initiated by quarks and gluons, respectively. By fitting the world data on D_{q,g}(μ^2) for charged hadrons measured in e^+e^- annihilation, we find a good agreement with the data and obtain the following value for the strong force coupling α_s^{(5)}(M_Z)=0.1177+0.0027-0.0025.
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BibTeX
@misc{kotikov2026alphas,
title = {{alpha_s from hadron multiplicities: an updated analysis}},
author = {A. V. Kotikov and B. G. Shaikhatdenov and N. D. Godlevsky and I. A. Kotikov},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.25135},
eprint = {2610.25135},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.25135},
}
RIS
TY - UNPB
TI - alpha_s from hadron multiplicities: an updated analysis
AU - A. V. Kotikov
AU - B. G. Shaikhatdenov
AU - N. D. Godlevsky
AU - I. A. Kotikov
PY - 2026
DA - 2026/10/18
PB - arXiv
DO - 10.48550/arxiv.2610.25135
UR - https://arxiv.org/abs/2610.25135
AB - Exploring the anomalous dimensions, resummed through next-to-next-to-leading-logarithmic order, we study the first Mellin moments D_{q,g}(μ^2) of the quark and gluon fragmentation functions, which correspond to the average hadron multiplicities in jets initiated by quarks and gluons, respectively. By fitting the world data on D_{q,g}(μ^2) for charged hadrons measured in e^+e^- annihilation, we find a good agreement with the data and obtain the following value for the strong force coupling α_s^{(5)}(M_Z)=0.1177+0.0027-0.0025.
ER -