1998/03/31 by J. M. Campbell, E. W. N. Glover, C.J. Maxwell +1
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevlett.81.1568
published as Phys.Rev.Lett.81:1568-1571,1998 · 12 pages, LaTeX, 3 figures, one figure added, discussion of heavy jet mass added, some small textual changes
arxiv created 1998/05/27 · openalex publication_date 1998/08/24 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We directly fit the experimentally measured energy dependence of the average value of 1\ensuremath-thrust, 〈1\ensuremath-T〉, over the e+e^\ensuremath- center-of-mass energy range Q\phantom\rule0ex0ex=\phantom\rule0ex0ex14--172GeV to the quantum chromodynamics expectation obtained by integrating up the evolution equation for d〈1\ensuremath-T〉/dlogQ in terms of 〈1\ensuremath-T〉. We fit for \ensuremathΛ_MS(5), uncalculated O(\ensuremathαs3) and higher perturbative corrections parametrized by the scheme invariant \ensuremathρ2, and the parameter \ensuremathλ which characterizes the magnitude of the leading 1/Q power corrections. We find \ensuremathΛ_MS(5)\phantom\rule0ex0ex=\phantom\rule0ex0ex245_\ensuremath-17+20MeV, which is equivalent to \ensuremathαs(MZ)\phantom\rule0ex0ex=\phantom\rule0ex0ex0.1194\ifmmode±\else\textpm\fi0.0014. In this approach, there is no error associated with the choice of the renormalization scale \ensuremathμ.