Determination of Lambda_QCD from the measured energy dependence of <1-Thrust>
| dc.creator | Campbell, J. M. | |
| dc.creator | Glover, E. W. N. | |
| dc.creator | Maxwell, C. J. | |
| dc.date | 1998-03-05 | |
| dc.date | 1998-05-27 | |
| dc.date.accessioned | 2026-07-07T10:33:38Z | |
| dc.date.available | 2026-07-07T10:33:38Z | |
| dc.description | We directly fit the experimentally measured energy dependence of the average value of 1-Thrust, <1-T>, over the e^+e^- centre-of-mass energy range Q=14 - 172 GeV to the QCD expectation obtained by integrating up the evolution equation for d<1-T>/dlog Q in terms of <1-T>. We fit for Lambda_QCD, uncalculated O(alpha_S^3) and higher perturbative corrections parameterized by the scheme invariant rho_2, and the parameter lambda which characterizes the magnitude of the leading 1/Q power corrections anticipated for <1-T>. A 3-parameter fit yields Lambda_QCD=245^{+20}_{-17} MeV, rho_2=-16\pm 11 and lambda=0.27^{+0.12}_{-0.10} GeV, equivalent to alpha_S(M_Z)=0.1194 \pm 0.0014. In this approach, there is no error associated with the choice of the renormalization scale mu. | |
| dc.description | 12 pages, LaTeX, 3 figures, one figure added, discussion of heavy jet mass added, some small textual changes | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9803254 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9803254 | |
| dc.identifier | Phys.Rev.Lett.81:1568-1571,1998 | |
| dc.identifier | doi:10.1103/PhysRevLett.81.1568 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/179184 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Determination of Lambda_QCD from the measured energy dependence of <1-Thrust> | |
| dc.type | text |