QCD studies in e+e− annihilation from 30 GeV to 189 GeV
نویسندگان
چکیده
منابع مشابه
annihilation from 14 to 209 GeV
Results from the study of jets in hadronic final states produced in ee annihilation at √ s = 14 to 209 GeV are discussed. Precise measurements of the strong coupling αS at many points of √ s provide convincing evidence for the running of αS as expected by QCD. Several measurements of the running b-quark mass mb(MZ0) are combined yielding mb(MZ0) = (2.92±0.03(stat.)±0.31(syst.)) GeV and compared...
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The multiplicity distributions at high energy e+e− annihilation are described well within the Two Stage Model in the region from 14 to 189 GeV. Energy dependence of parameters of this model gives the dynamic picture of the parton stage and the stage of hadronization. It is shown that oscillations in sign of the ratio of factorial cumulant moments over factorial moments of increasing order can b...
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The inclusive production of D mesons in photon-photon collisions has been measured using the OPAL detector at LEP at ee centre-of-mass energies √ see of 183 and 189 GeV. The D ∗+ mesons are reconstructed in their decay to Dπ with the D observed in the two decay modes Kπ and Kπππ. After background subtraction, 100.4± 12.6 (stat) D mesons have been selected in events without observed scattered be...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2000
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(00)00891-1