FINAL-STATE PHOTON BREMSSTRAHLUNG IN E+E--]Z(0)-] HADRONS AS A TOOL FOR A PRECISE MEASUREMENT OF THE WEAK QUARK COUPLINGS

被引：16

作者：

MATTIG, P ^{[1
]}

ZEUNER, W ^{[1
]}

机构：

[1] CERN,CH-1211 GENEVA,SWITZERLAND

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1991年 / 52卷 / 01期

关键词：

D O I：

10.1007/BF01412324

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We discuss for the process e+ e- --> Z0 --> qqBAR how final state photons can be used to disentangle the weak couplings of up and down type quarks. Since the flavour composition of multihadronic events with final state photons is different from that of all multihadrons, a combination of observables from the two samples allows the couplings to be determined. Both the Z0 width and the forward-backward charge asymmetry at centre-of-mass energies around M(Z0) can be used to constrain the weak couplings. Taking into account the theoretical uncertainties a precision for the sum of the square axial and vector couplings of delta (v2 + a2) approximately 4% for up and down type quarks separately seems feasible for 10(6) Z0's. The precision from asymmetry measurements will be less significant.

引用

页码：31 / 41

页数：11

共 31 条

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