We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK


93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Measurement of the strong coupling alpha(s) fro...
View graph of relations

« Back

Measurement of the strong coupling alpha(s) from the four-jet rate in e+ e- annihilation using JADE data

Research output: Contribution to journalJournal article


Journal publication date10/2006
JournalThe European Physical Journal C (EPJ C) - Particles and Fields
Number of pages11
Original languageEnglish


Data from e+e- annihilation into hadrons collected by the JADE experiment at centre-of-mass energies between 14 GeV and 44 GeV are used to study the four-jet event production rate as a function of the Durham jet algorithm’s resolution parameter ycut. The four-jet rate is compared to QCD next-to-leading order calculations including resummation of large logarithms in the next-to-leading logarithmic approximation. The strong coupling measured from the four-jet rate is αS(MZ0)=0.1159±0.0004(stat.)±0.0012(exp.)±0.0024(had.)±0.0007(theo.) in agreement with the world average.