Subjet distributions were measured in neutral current deep inelastic ep scattering with the ZEUS detector at HERA using an integrated luminosity of 81.7 pb(-1). Jets were identified using the k(T) cluster algorithm in the laboratory frame. Subjets were defined as jet-like substructures identified by a reapplication of the cluster algorithm at a smaller value of the resolution parameter y(cut). Measurements of subjet distributions for jets with exactly two subjets for y(cut) = 0.05 are presented as functions of observables sensitive to the pattern of parton radiation and to the colour coherence between the initial and final states. Perturbative QCD predictions give an adequate description of the data.

Subjet distributions in deep inelastic scattering at HERA

COSTA, Marco;FERRERO, Maria Italia;MONACO, Vincenzo;SACCHI, Roberto;SOLA, VALENTINA;SOLANO, Ada Maria;
2009-01-01

Abstract

Subjet distributions were measured in neutral current deep inelastic ep scattering with the ZEUS detector at HERA using an integrated luminosity of 81.7 pb(-1). Jets were identified using the k(T) cluster algorithm in the laboratory frame. Subjets were defined as jet-like substructures identified by a reapplication of the cluster algorithm at a smaller value of the resolution parameter y(cut). Measurements of subjet distributions for jets with exactly two subjets for y(cut) = 0.05 are presented as functions of observables sensitive to the pattern of parton radiation and to the colour coherence between the initial and final states. Perturbative QCD predictions give an adequate description of the data.
2009
63
527
548
http://dx.doi.org/10.1140/epjc/s10052-009-1090-3
High Energy Physics; HERA; ZEUS Collaboration
S. Chekanov;M. Derrick;S. Magill;B. Musgrave;D. Nicholass;J. Repond;R. Yoshida;M. C. K. Mattingly;P. Antonioli;G. Bari;L. Bellagamba;D. Bo...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/68747
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