A STUDY OF THE RECOMBINATION SCHEME DEPENDENCE OF JET PRODUCTION-RATES AND OF ALPHA-S(MZ0) IN HADRONIC Z0 DECAYS

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作者：

AKRAWY, MZ

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来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1991年 / 49卷 / 03期

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O412 [相对论、场论]; O572.2 [粒子物理学];

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摘要：

Jet production rates in hadronic Z0 decays are studied using four different recombination schemes to define resolvable jets. The strong coupling constant alpha-s(M(Z)0) is determined in fits of the corresponding O(alpha-s2) QCD calculations to the differential 2-jet distributions D2(y). Hadronisation corrections and renormalisation scale uncertainties are found to be different for each recombination scheme. Within their overall systematic uncertainties, the four schemes yield consistent values of alpha-s(M(Z0)), leading to a final result of alpha-s(M(Z0)) = 0.118 +/- 0.008. The error includes the experimental uncertainties (+/- 0.003), uncertainties of hadronisation corrections and of the degree of parton virtualities to which the data are corrected, as well as the uncertainty of choosing the renormalisation scale.

引用

页码：375 / 384

页数：10

共 43 条

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