The cross section for the photoproduction of events containing three jets with a three-jet invariant mass of M(3J) > 50 GeV has been measured with the ZEUS detector at HERA. The three-jet angular distributions are inconsistent with a uniform population of the available phase space but are well described by parton shower models and O(alpha alpha(s)(2)) pQCD calculations. Comparisons with the parton shower model indicate a strong contribution from initial state radiation as well as a sensitivity to the effects of colour coherence. (C) 1998 Elsevier Science B.V. All rights reserved.
Measurement of three-jet distributions in photoproduction at HERA
SACCHI, Roberto;CIRIO, Roberto;COSTA, Marco;MONACO, Vincenzo;PERONI, Cristiana;SOLANO, Ada Maria;
1998-01-01
Abstract
The cross section for the photoproduction of events containing three jets with a three-jet invariant mass of M(3J) > 50 GeV has been measured with the ZEUS detector at HERA. The three-jet angular distributions are inconsistent with a uniform population of the available phase space but are well described by parton shower models and O(alpha alpha(s)(2)) pQCD calculations. Comparisons with the parton shower model indicate a strong contribution from initial state radiation as well as a sensitivity to the effects of colour coherence. (C) 1998 Elsevier Science B.V. All rights reserved.File in questo prodotto:
File | Dimensione | Formato | |
---|---|---|---|
1-s2.0-S0370269398013604-main.pdf
Accesso riservato
Tipo di file:
POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione
303.54 kB
Formato
Adobe PDF
|
303.54 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.