NNLO τ+τ− production cross section at threshold

2002/09/30 by Pedro Ruiz-Femenía, P. Ruiz-Femenia, A. Pich +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:10.1016/s0920-5632(03)01847-4

published as Nucl.Phys.Proc.Suppl.121:205-208,2003 · 4 pages, 3 figures. To appear in the proceedings of QCD 02: High-Energy Physics International Conference in Quantum Chromodynamics, Montpellier, France, 2-9 Jul 2002

arxiv created 2002/09/30 · openalex publication_date 2003/06/01 · arxiv updated 2009/11/30 · openalex created_date 2019/11/22 · openalex updated_date 2026/07/28

Abstract

The threshold behaviour of the cross section sigma(e+e- -> tau+tau-) is analysed, taking into account the known higher-order corrections. At present, this observable can be determined to next-to-next-to-leading order (NNLO) in a combined expansion in powers of alpha_s and fermion velocities.

Citations

• Bottom quark mass and |Vcb| matrix element from and Γs1(b → clνl) in the next-to-next-to-leading order
• Bottom quark mass and αs from the ϒ system