Improved tau polarisation measurement
Zeitschrift für Physik C: Particles and Fields, ISSN: 1431-5858, Vol: 69, Issue: 2, Page: 183-193
1995
- 1Citations
- 12Usage
- 20Captures
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- Citations1
- Citation Indexes1
- CrossRef1
- Usage12
- Downloads10
- Abstract Views2
- Captures20
- Readers20
- 20
Article Description
Using 22 pb of data collected at LEP in 1992 on the peak of the Z resonance, the ALEPH collaboration has measured the polarisation of the tau leptons decaying into {Mathematical expression}, πν, ρν and a ν from their individual decay product distributions. The measurement of the tau polarisation as a function of the production polar angle yields the two parameters N and N, where, in terms of the axial and vector couplings g and g, N=2 g g/(g +g ). This analysis follows to a large extent the methods devised for the 1990 and 1991 data but with improvements which bring a better understanding of the systematic uncertainties. Combining the 1992 measurements with our previously published results yields N=0.136±0.012±0.009 and N=0.129±0.016±0.005. Assuming e-τ universality, the measurements imply an effective weak mixing angle of sin θ =0.2332±0.0014. © 1996 Springer-Verlag.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=57149125862&origin=inward; http://dx.doi.org/10.1007/bf02907399; http://link.springer.com/10.1007/BF02907399; http://www.springerlink.com/index/pdf/10.1007/BF02907399; http://link.springer.com/content/pdf/10.1007/BF02907399; http://link.springer.com/content/pdf/10.1007/BF02907399.pdf; http://link.springer.com/article/10.1007/BF02907399/fulltext.html; https://ink.library.smu.edu.sg/sis_research/5835; https://ink.library.smu.edu.sg/cgi/viewcontent.cgi?article=6838&context=sis_research; http://www.springerlink.com/index/10.1007/BF02907399; https://dx.doi.org/10.1007/bf02907399; https://link.springer.com/article/10.1007/BF02907399
Springer Nature
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