ATLAS

Research group

Research theme

Sub department

About

Related research groups

Experimental determination of parton distributions

HERA and the LHC: A Workshop on the Implications of HERA for LHC Physics, HERA-LHC 2005 - Proceedings (2005) 78-118

Authors:

T Carli, A Cooper-Sarkar, J Feltesse, A Glazov, C Gwenlan, M Klein, T Laštovička, G Laštovička-Medin, S Moch, B Reisert, G Salam, F Siegert

Introduction to parton distribution functions

HERA and the LHC: A Workshop on the Implications of HERA for LHC Physics, HERA-LHC 2005 - Proceedings (2005) 43-45

Authors:

M Dittmar, S Forte, A Glazov, S Moch, S Alekhin, G Altarelli, J Andersen, RD Ball, J Blümlein, H Böttcher, T Carli, M Ciafaloni, D Colferai, A Cooper-Sarkar, G Corcella, L Del Debbio, G Dissertori, J Feltesse, A Guffanti, C Gwenlan, J Huston, G Ingelman, M Klein, T Laštovička, G Laštovička-Medin, JI Latorre, L Magnea, A Piccione, J Pumplin, V Ravindran, B Reisert, J Rojo, AS Vera, GP Salam, F Siegert, A Staśto, H Stenzel, C Targett-Adams, RS Thorne, A Tricoli, JAM Vermaseren, A Vogt

Abstract:

We provide an assessment of the impact of parton distributions on the determination of LHC processes, and of the accuracy with which parton distribution functions (PDFs) can be extracted from data, in particular from current and forthcoming HERA experiments. We give an overview of reference LHC processes and their associated PDF uncertainties, and study in detail W and Z production at the LHC. We discuss the precision which may be obtained from the analysis of existing HERA data, tests of consistency of HERA data from different experiments, and the combination of these data. We determine further improvements on PDFs which may be obtained from future HERA data (including measurements of FL), and from combining present and future HERA data with present and future hadron collider data. We review the current status of knowledge of higher (NNLO) QCD corrections to perturbative evolution and deep-inelastic scattering, and provide reference results for their impact on parton evolution, and we briefly examine non-perturbative models for parton distributions. We discuss the state-of-the art in global parton fits, we assess the impact on them of various kinds of data and of theoretical corrections, by providing benchmarks of Alekhin and MRST parton distributions and a CTEQ analysis of parton fit stability, and we briefly present proposals for alternative approaches to parton fitting. We summarize the status of large and small x resummation, by providing estimates of the impact of large x resummation on parton fits, and a comparison of different approaches to small x resummation, for which we also discuss numerical techniques.

Irradiation studies for the ATLAS inner detector opto-electronic readout system for SLHC

Proceedings - 11th Workshop on Electronics for LHC and Future Experiments, LECC 2005 (2005) 311-315

Authors:

C Issever, ML Chu, V Cindro, T Huffman, G Kramberger, I Mandic, PK Teng, AD Weidberg

Abstract:

We present measurements of the performance of Vertical Cavity Surface Emitting Lasers (VCSELs) after irradiating them up to 1.0E+16 n eq/cm2 and performance measurements of optical Step-Index-Multi-Mode (SIMM) fibres which were irradiated up to 140Mrad.

LHC final states and their potential experimental and theoretical accuracies

HERA and the LHC: A Workshop on the Implications of HERA for LHC Physics, HERA-LHC 2005 - Proceedings (2005) 46-77

Authors:

A Cooper-Sarkar, M Dittmar, GDC Gwenlan, H Stenzel, A Tricoli

Search for chargino and neutralino associated production at the Tevatron

Proceedings of Science 21 (2005)

Abstract:

I present a review of the searches for charginos and neutralinos using data from proton-antiproton collision at the centre of mass energy of 1.96 TeV collected by the CDF and the D0 experiments at the Tevatron during run II.
Details from ArXiV