Three-jet production in the reaction ep --> eXp has been studied with the ZEUS detector at HERA using an integrated luminosity of 42.74 pb^-1. The data were measured in the kinematic region 5 < Q^2 < 100 GeV^2, 200 < W < 250 GeV and 23 < M_X < 40 GeV. The diffractive signal was selected by requiring a large rapidity gap in the outgoing proton direction. Jets were reconstructed in the centre-of-mass system of X using the exclusive k_T-algorithm. A sample of three-jet events in diffraction has been identified. Differential cross sections were measured as a function of the jet pseudorapidity and jet transverse momentum with respect to the virtual photon-Pomeron axis. The jets going in the Pomeron direction are broader than those going in the virtual-photon direction. This is consistent with models predicting that gluons are predominantly produced in the Pomeron direction and quarks in the virtual-photon direction.
Three-jet production in diffractive deep inelastic scattering at HERA / Chekanov S.; Derrick M.; Krakauer D.; Magill S.; Musgrave B.; Pellegrino A.; Repond J.; Yoshida R.; Mattingly M.C.K.; Antonioli P.; Bari G.; Basile M.; Bellagamba L.; Boscherini D.; Bruni A.; Bruni G.; Cara Romeo G.; Cifarelli L.; Cindolo F.; Contin A.; Corradi M.; De Pasquale S.; Giusti P.; Iacobucci G.; Levi G.; Margotti A.; Massam T.; Nania R.; Palmonari F.; Pesci A.; Sartorelli G.; Zichichi A.; Aghuzumtsyan G.; Brock I.; Goers S.; Hartmann H.; Hilger E.; Irrgang P.; Jakob H.-P.; Kappes A.; Katz U.F.; Kerger R.; Kind O.; Paul E.; Rautenberg J.; Schnurbusch H.; Stifutkin A.; Tandler J.; Voss K.C.; Weber A.; Wieber H.; Bailey D.S.; Brook N.H.; Cole J.E.; Foster B.; Heath G.P.; Heath H.F.; Robins S.; Rodrigues E.; Scott J.; Tapper R.J.; Wing M.; Capua M.; Mastroberardino A.; Schioppa M.; Susinno G.; Jeoung H.Y.; Kim J.Y.; Lee J.H.; Lim I.T.; Ma K.J.; Pac M.Y.; Caldwell A.; Helbich M.; Liu W.; Liu X.; Mellado B.; Paganis S.; Sampson S.; Schmidke W.B.; Sciulli F.; Chwastowski J.; Eskreys A.; Figiel J.; Klimek K.; Olkiewicz K.; Przybycien M.B.; Stopa P.; Zawiejski L.; Bednarek B.; Jelen K.; Kisielewska D.; Kowal A.M.; Kowal M.; Kowalski T.; Mindur B.; Przybycien M.; Rulikowska-Zarebska E.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 516:3-4(2001), pp. 273-292. [10.1016/S0370-2693(01)00928-5]
Three-jet production in diffractive deep inelastic scattering at HERA
Bari G.;Basile M.Membro del Collaboration Group
;Bellagamba L.Membro del Collaboration Group
;Boscherini D.Membro del Collaboration Group
;Bruni A.Membro del Collaboration Group
;Cifarelli L.;Contin A.;Corradi M.;De Pasquale S.;Giusti P.;Levi G.;Palmonari F.;Pesci A.;Sartorelli G.;Zichichi A.;Robins S.;Rodrigues E.;Scott J.;Liu X.;
2001
Abstract
Three-jet production in the reaction ep --> eXp has been studied with the ZEUS detector at HERA using an integrated luminosity of 42.74 pb^-1. The data were measured in the kinematic region 5 < Q^2 < 100 GeV^2, 200 < W < 250 GeV and 23 < M_X < 40 GeV. The diffractive signal was selected by requiring a large rapidity gap in the outgoing proton direction. Jets were reconstructed in the centre-of-mass system of X using the exclusive k_T-algorithm. A sample of three-jet events in diffraction has been identified. Differential cross sections were measured as a function of the jet pseudorapidity and jet transverse momentum with respect to the virtual photon-Pomeron axis. The jets going in the Pomeron direction are broader than those going in the virtual-photon direction. This is consistent with models predicting that gluons are predominantly produced in the Pomeron direction and quarks in the virtual-photon direction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
