Strong coupling constant from scaling violations in fragmentation functions.
Strong coupling constant from scaling violations in fragmentation functions.
复制标题
碎片函数中缩放违规带来的强耦合常数。
DOI:
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发表时间:
2000
影响因子:
8.6
通讯作者:
B. Pötter
中科院分区:
文献类型:
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作者:
B. Kniehl;G. Kramer;B. Pötter
We present a new determination of the strong coupling constant alpha(s) through the scaling violations in the fragmentation functions for charged pions, charged kaons, and protons. In our fit we include the latest e+e- annihilation data from CERN LEP1 and SLAC SLC on the Z-boson resonance and older, yet very precise, data from SLAC PEP at center-of-mass energy sqaure root of s = 29 GeV. At next-to-leading order, we find alpha(s)(5)(M(Z)) = 0.1170+/-0.0073. A new world average of alpha(s) is given.