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Particles and Fields
Eur. Phys. J. C 27, 531-545 (2003)
DOI: 10.1140/epjc/s2002-01148-x

Measurement of event shapes in deep inelastic scattering at HERA

The ZEUS collaboration

(Received: 13 November 2002 / Published online: 7 March 2003 )

Inclusive event-shape variables have been measured in the current region of the Breit frame for neutral current deep inelastic ep scattering using an integrated luminosity of $45.0 {\ {\rm
pb^{-1}}}$ collected with the ZEUS detector at HERA. The variables studied included thrust, jet broadening and invariant jet mass. The kinematic range covered was $10 < Q^2 < 20\,480\,{\rm GeV}^2$ and $6\times 10^{-4} < x <
0.6$ , where Q2 is the virtuality of the exchanged boson and x is the Bjorken variable. The Q dependence of the shape variables has been used in conjunction with NLO perturbative calculations and the Dokshitzer-Webber non-perturbative corrections (`power corrections') to investigate the validity of this approach.

© Società Italiana di Fisica, Springer-Verlag 2003