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Forward jet production in deep inelastic ep scattering and low-x parton dynamics at HERA

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 632:1 (2006) 13-26

Authors:

S Chekanov, M Derrick, S Magill, S Miglioranzi, B Musgrave, J Repond, R Yoshida, MCK Mattingly, N Pavel, AG Yagües Molina, P Antonioli, G Bari, M Basile, L Bellagamba, D Boscherini, A Bruni, G Bruni, G Cara Romeo, L Cifarelli, F Cindolo, A Contin, M Corradi, S De Pasquale, P Giusti, G Iacobucci, A Margotti, A Montanari, R Nania, F Palmonari, A Pesci, A Polini, L Rinaldi, G Sartorelli, A Zichichi, G Aghuzumtsyan, D Bartsch, I Brock, S Goers, H Hartmann, E Hilger, P Irrgang, HP Jakob, O Kind, U Meyer, E Paul, J Rautenberg, R Renner, KC Voss, M Wang, M Wlasenko, DS Bailey, NH Brook, JE Cole, GP Heath, T Namsoo, S Robins, M Capua, A Mastroberardino, M Schioppa, G Susinno, E Tassi, JY Kim, KJ Ma, M Helbich, Y Ning, Z Ren, WB Schmidke, F Sciulli, J Chwastowski, A Eskreys, J Figiel, A Galas, K Olkiewicz, P Stopa, D Szuba, L Zawiejski, L Adamczyk, T Bołd, I Grabowska-Bołd, D Kisielewska, AM Kowal, J Łukasik, M Przybycień, L Suszycki, J Szuba, A Kotański, W Słomiński, V Adler, U Behrens, I Bloch, K Borras, G Drews, J Fourletova, A Geiser, D Gladkov, P Göttlicher, O Gutsche, T Haas, W Hain, C Horn

Abstract:

Differential inclusive jet cross sections in neutral current deep inelastic ep scattering have been measured with the ZEUS detector using an integrated luminosity of 38.7 pb-1. The jets have been identified using the kT cluster algorithm in the longitudinally invariant inclusive mode in the laboratory frame; they have been selected with jet transverse energy, ETjet above 6 GeV and jet pseudorapidity, ηjet, between -1 and 3. Measurements of cross sections as functions of ETjet, Björken x and the photon virtuality, Q2, are presented. Three phase-space regions have been selected in order to study parton dynamics from the most global to the most restrictive region of forward-going (close to the proton-beam direction) jets at low x, where the effects of BFKL evolution might be present. The measurements have been compared to the predictions of leading-logarithm parton-shower Monte Carlo models and fixed-order perturbative QCD calculations. In the forward region, O (αs1) QCD calculations underestimate the data up to an order of magnitude at low x. An improved description of the data in this region is obtained by including O (αs2) QCD corrections, which account for the lowest-order t̂-channel gluon-exchange diagrams, highlighting the importance of such terms in the parton dynamics at low x. © 2005 Elsevier B.V. All rights reserved.
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GeV laser-plasma electron acceleration in a cm-scale capillary waveguide

Optics InfoBase Conference Papers (2006)

Authors:

K Nakamura, C Tóth, B Nagler, CGR Geddes, CB Schroeder, E Esarey, WP Leemans, AJ Gonsalves, SM Hooker

Abstract:

33 mm plasma channels produced in a gas-filled capillary discharge and 40 TW, 40 fs laser pulses were used to produce GeV electron beams in a multi-table-top setup. © 2006 Optical Society of America.

GeV laser-plasma electron acceleration in a cm-scale capillary waveguide

Optics InfoBase Conference Papers (2006)

Authors:

K Nakamura, C Tóth, B Nagler, CGR Geddes, CB Schroeder, E Esarey, WP Leemans, AJ Gonsalves, SM Hooker

Abstract:

33 mm plasma channels produced in a gas-filled capillary discharge and 40 TW, 40 fs laser pulses were used to produce GeV electron beams in a multi-table-top setup. ©2006 Optical Society of America.

GeV laser-plasma electron acceleration in a cm-scale capillary waveguide

Optics InfoBase Conference Papers (2006)

Authors:

K Nakamura, C Tóth, B Nagler, CGR Geddes, CB Schroeder, E Esarey, WP Leemans, AJ Gonsalves, SM Hooker

Abstract:

33 mm plasma channels produced in a gas-filled capillary discharge and 40 TW, 40 fs laser pulses were used to produce GeV electron beams in a multi-table-top setup. © 2006 Optical Society of America.

GeV laser-plasma electron acceleration in a cm-scale capillary waveguide

Optics InfoBase Conference Papers (2006)

Authors:

K Nakamura, C Tóth, B Nagler, CGR Geddes, CB Schroeder, E Esarey, WP Leemans, AJ Gonsalves, SM Hooker

Abstract:

33 mm plasma channels produced in a gas-filled capillary discharge and 40 TW, 40 fs laser pulses were used to produce GeV electron beams in a multi-table-top setup. © 2006 Optical Society of America.
More details from the publisher