Studies of QCD in e+e- → hadrons at Ecm = 130 and 136 GeV

• Main Authors: BUSKULIC, D., THULASIDAS, M.
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 1997
• Subjects: Computer Sciences; Databases and Information Systems
• Online Access: https://ink.library.smu.edu.sg/sis_research/5870; https://ink.library.smu.edu.sg/context/sis_research/article/6873/viewcontent/ppe_96_043.pdf
• Institution: Singapore Management University

Studies of QCD in e+e−→e+e−→ Hadrons at Ecm=Ecm=} 130 and 136 GeV The ALEPH Collaboration An analysis of the properties of hadronic final states produced in electron-positron annihilation at centre-of-mass energies of 130 and 136 GeV is presented. The measurements are based on a data sample of 5.7 pb−1pb−1 collected in November 1995 with the \Aleph detector at LEP. Inclusive charged particle distributions, jet rates and event-shape distributions are measured and the results are compared with the predictions of QCD-based models. From the measured distributions quantities are determined for which the dependence on the centre-of-mass energy can be predicted by QCD, including the mean multiplicity of charged particles, the peak position of the inclusive distribution of ξ=−lnxpξ=−ln⁡xp (xp=p/pbeamxp=p/pbeam), and the strong coupling constant αsαs. The QCD predictions are tested by comparing with corresponding measurements at Ecm=91.2Ecm=91.2 GeV and at lower energies.