Energy and virtuality scale dependence in quark and gluon jets
(1998) In Journal of High Energy Physics 1998(JHEP09(1998)).- Abstract
- We discuss some important issues concerning multiplicities in quark and gluon jets in e+e- annihilation. In QCD the properties of a jet in general depend on two scales, the energy and virtuality of the jet. Frequently theoretical predictions apply to a situation where these scales coincide, while for experimental data they are often different. Thus an analysis to extract e.g. the asymptotic multiplicity ratio CF/CA between quark and gluon jets, needs a carefully specified jet definition, together with a calculation of nonleading corrections to the multiplicity evolution. We propose methods to systematically study the separate dependence upon the two scales in experimental data and compare the results with theory. We present jet finding... (More)
- We discuss some important issues concerning multiplicities in quark and gluon jets in e+e- annihilation. In QCD the properties of a jet in general depend on two scales, the energy and virtuality of the jet. Frequently theoretical predictions apply to a situation where these scales coincide, while for experimental data they are often different. Thus an analysis to extract e.g. the asymptotic multiplicity ratio CF/CA between quark and gluon jets, needs a carefully specified jet definition, together with a calculation of nonleading corrections to the multiplicity evolution. We propose methods to systematically study the separate dependence upon the two scales in experimental data and compare the results with theory. We present jet finding algorithms which corresponds well to the theoretically considered jets. We also show that recoil effects add corrections to the modified leading log approximation which are quantitatively important, though formally suppressed at high energies. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/efc2f472-cda9-4d8c-af92-3773e7a34940
- author
- Gustafson, Gösta LU and Edén, Patrik LU
- organization
- publishing date
- 1998
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of High Energy Physics
- volume
- 1998
- issue
- JHEP09(1998)
- article number
- 015
- publisher
- Springer
- external identifiers
-
- scopus:84865925172
- ISSN
- 1029-8479
- DOI
- 10.1088/1126-6708/1998/09/015
- language
- English
- LU publication?
- yes
- id
- efc2f472-cda9-4d8c-af92-3773e7a34940
- date added to LUP
- 2019-05-21 14:24:40
- date last changed
- 2024-01-01 05:57:57
@article{efc2f472-cda9-4d8c-af92-3773e7a34940, abstract = {{We discuss some important issues concerning multiplicities in quark and gluon jets in e+e- annihilation. In QCD the properties of a jet in general depend on two scales, the energy and virtuality of the jet. Frequently theoretical predictions apply to a situation where these scales coincide, while for experimental data they are often different. Thus an analysis to extract e.g. the asymptotic multiplicity ratio CF/CA between quark and gluon jets, needs a carefully specified jet definition, together with a calculation of nonleading corrections to the multiplicity evolution. We propose methods to systematically study the separate dependence upon the two scales in experimental data and compare the results with theory. We present jet finding algorithms which corresponds well to the theoretically considered jets. We also show that recoil effects add corrections to the modified leading log approximation which are quantitatively important, though formally suppressed at high energies.}}, author = {{Gustafson, Gösta and Edén, Patrik}}, issn = {{1029-8479}}, language = {{eng}}, number = {{JHEP09(1998)}}, publisher = {{Springer}}, series = {{Journal of High Energy Physics}}, title = {{Energy and virtuality scale dependence in quark and gluon jets}}, url = {{http://dx.doi.org/10.1088/1126-6708/1998/09/015}}, doi = {{10.1088/1126-6708/1998/09/015}}, volume = {{1998}}, year = {{1998}}, }