Event shapes in deep inelastic scattering at HERA.
Journal Article
·
· Nucl. Phys. B
OSTI ID:962871
Mean values and differential distributions of event-shape variables have been studied in neutral current deep inelastic scattering using an integrated luminosity of 82.2 pb{sup -1} collected with the ZEUS detector at HERA. The kinematic range is 80 < Q{sup 2} < 20480 GeV{sup 2} and 0.0024 < x < 0.6, where Q{sup 2} is the virtuality of the exchanged boson and x is the Bjorken variable. The data are compared with a model based on a combination of next-to-leading-order QCD calculations with next-to-leading-logarithm corrections and the Dokshitzer-Webber non-perturbative power corrections. The power-correction method provides a reasonable description of the data for all event-shape variables studied. Nevertheless, the lack of consistency of the determination of as a{sub s} and of the non-perturbative parameter of the model a{sub 0}, suggests the importance of higher-order processes that are not yet included in the model.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 962871
- Report Number(s):
- ANL-HEP-PR-06-65
- Journal Information:
- Nucl. Phys. B, Journal Name: Nucl. Phys. B Journal Issue: 2007 Vol. 767
- Country of Publication:
- United States
- Language:
- ENGLISH
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