COMBINED FIT TO R(E+E--]HADRONS) AND DATA FROM THE CERN E+E- COLLIDER LEP

被引：10
|
作者：
BRANCHINA, V
CONSOLI, M
FIORE, R
ZAPPALA, D
机构：
[1] IST NAZL FIS NUCL, SEZ CATANIA, CATANIA, ITALY
[2] UNIV CALABRIA, DIPARTIMENTO FIS, COSENZA, ITALY
来源：
PHYSICAL REVIEW D | 1992年 / 46卷 / 01期
关键词：
D O I：
10.1103/PhysRevD.46.75
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A combined fit to R(e+e --> hadrons) in the range 5-61.4 GeV and to the data from the CERN e+e- collider LEP is presented to obtain a global estimate of the strong-interaction scale parameter LAMBDA(MS/(5)) free of uncertainties due to hadronization and choice of the momentum scale, where MSBAR denotes the modified minimal subtraction scheme. Our fitted values LAMBDA(MS/(5))=545(-182)+221 MeV, in the range 5-94 GeV, and LAMBDA(MS/(5))-961(-314)+383 MeV, in the range 14-94 GeV, do not agree, within two standard deviations, with the low-energy determinations from UPSILON branching ratios and deep-inelastic scattering.
引用
收藏
页码：75 / 83
页数：9
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