𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Measurements of αs from QCD event shapes at OPAL and LEP

✍ Scribed by M.T. Ford

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
372 KB
Volume
121
Category
Article
ISSN
0920-5632

No coin nor oath required. For personal study only.

✦ Synopsis

New preliminary measurements of the strong coupling a, are presented, using hadronic decays observed in the OPAL detector at LEP. Previous OPAL measurements are updated to incorporate the latest theoretical predictions. New techniques for the estimation of theoretical uncertainties are discussed. The preliminary combined measurement, from all event shape fits performed bv the four LEP collaborations at all centre-of-mass energies is cyLl = 0.1198 % 0.0003 (stat.) f-0.004? (syst.

📜 SIMILAR VOLUMES

Measurements of αs from event shapes and
Measurements of αs from event shapes and the four-jet rate
✍ G. Dissertori 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 503 KB

New results from measurements of the strong coupling constant αs(MZ) at LEP are presented. In particular, a new LEP combination of results based on event-shape variables has become available, where a new method for the estimation of the theoretical uncertainty has been implemented. Furthermore, two

Measurement of αs and the β function wit
Measurement of αs and the β function with the DELPHI detector at LEP
✍ O. Prison 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 350 KB

Event shape distributions in e+e-annihilation are determined from the DELPHI data taken between 183 and 207GeV. Fkom these the strong coupling crs is extracted with several techniques. Together with the results from other LEP2 energies and at about ms this allows both, a combined measurement of a,