Abstract
We have studiedpp collisions at the CERN ISR at\(\sqrt s = 63 GeV\) using a jet trigger. We demonstrate that a sample of well-separated triple high-p T jet events can be described as due to the QCD bremsstrahlung process. The energy flow of these 3-jet events is well described by an independent fragmentation model, with a gluon-jet transverse width 33% greater than the quark-jet width. From the ratio of the 3- and 2-jet production crosssections the strong coupling is determined to lowest order in QCD. We find α s =0.18±0.03 (stat.) ±0.04 (stst.). The error does not include the theoretical uncertainty in the fragmentation scheme.
We compare our results with measurements at the SPS Collider and discuss the different methods used.
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The Axial Field Spectrometer Collaboration., Åkesson, T., Albrow, M.G. et al. Three-jet production inpp collisions at\(\sqrt s = 63 GeV\) and a determination of α s . Z. Phys. C - Particles and Fields 32, 317–334 (1986). https://doi.org/10.1007/BF01551827
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DOI: https://doi.org/10.1007/BF01551827