A study of energy-energy correlations in charged tracks from hadronic decays of the Z0 at 91.2 Gev

Boyle, Owen (1992) A study of energy-energy correlations in charged tracks from hadronic decays of the Z0 at 91.2 Gev. PhD thesis, University of Glasgow.

Full text available as:
Download (4MB) | Preview


The energy-energy correlations in charged tracks from the hadronic decays of the Z0 were studied at energies around the Z0-pole of 91.2 Gev. From a comparison with order-alpha-s-squared analytical formulae, the strong coupling constant, alpha-s, was measured. The results obtained were

From the EEC: 0.132 +/- 0.006 +0.012/-0.009
From the AEEC: 0.109 +/- 0.007 +0.011/-0.007

where the first error is experimental and the second is due to scale uncertainty.

The EEC was also studied for particle clusters and compared with a parton-level Monte Carlo simulation using an exact order-alpha-s-squared matrix element formula. From this study, the value of alpha-s obtained was

From clustered EEC: 0.111 +0.016/-0.013

An observation of the effects of coherence in b-quark fragmentation was made, leading to evidence in support of the principle of Local Parton-Hadron Duality.

An attempt was made to discriminate between samples of quark and gluon jets using the EEC function. No clear conclusion was reached due to limited statistics and the energy mismatch between quark jets and gluon jets.

Item Type: Thesis (PhD)
Qualification Level: Doctoral
Additional Information: Dept. of Physics and Astronomy, Glasgow University
Keywords: z0, boson, aleph, alpha-s, eec, strong coupling constant, lep, cern, qcd, strong force, hadron, parton, gluon, quark
Subjects: Q Science > QC Physics
Colleges/Schools: College of Science and Engineering > School of Physics and Astronomy
Supervisor's Name: Smith, Dr. Kenway
Date of Award: 1992
Depositing User: Dr. Owen A. Boyle
Unique ID: glathesis:1992-4559
Copyright: Copyright of this thesis is held by the author.
Date Deposited: 13 Sep 2013 08:28
Last Modified: 13 Sep 2013 08:34
URI: http://theses.gla.ac.uk/id/eprint/4559
Related URLs:

Actions (login required)

View Item View Item


Downloads per month over past year