Determination of the strong coupling constant using subjet multiplicities in Neutral Current Deep Inelastic Scattering
High Energy Physics - Experiment
2015-06-25 v1
Abstract
The internal structure of the jets produced in neutral current interactions for Q^2>125 GeV^2 has been studied using the subjet multiplicity with the ZEUS detector at HERA. Jets are identified in the laboratory frame by applying the longitudinally invariant k_T-cluster algorithm. Next-to-leading order QCD calculations have been obtained and compared to the data; a good agreement has been observed in the region where hadron-to-parton corrections are small, E_{T,jet}> 25 GeV. In this region, the strong coupling constant is extracted and the resulting value is alpha_s (M_Z)=0.1185 +/- 0.0016 (stat.) ^{+0.0067}_{-0.0048} (syst.) ^{+0.0089}_{-0.0071} (th.).
Keywords
Cite
@article{arxiv.hep-ex/0111072,
title = {Determination of the strong coupling constant using subjet multiplicities in Neutral Current Deep Inelastic Scattering},
author = {O. Gonzalez},
journal= {arXiv preprint arXiv:hep-ex/0111072},
year = {2015}
}
Comments
5 pages, 2 figures, to be published in the Proceedings of the DIS-2001 Workshop