Parton Distributions
Abstract
We provide an assessment of the state of the art in various issues related to experimental measurements, phenomenological methods and theoretical results relevant for the determination of parton distribution functions (PDFs) and their uncertainties, with the specific aim of providing benchmarks of different existing approaches and results in view of their application to physics at the LHC. We discuss higher order corrections, we review and compare different approaches to small x resummation, and we assess the possible relevance of parton saturation in the determination of PDFS at HERA and its possible study in LHC processes. We provide various benchmarks of PDF fits, with the specific aim of studying issues of error propagation, non-gaussian uncertainties, choice of functional forms of PDFs, and combination of data from different experiments and different processes. We study the impact of combined HERA (ZEUS-H1) structure function data, their impact on PDF uncertainties, and their implications for the computation of standard candle processes, and we review the recent F_L determination at HERA. Finally, we compare and assess methods for luminosity measurements at the LHC and the impact of PDFs on them.
Cite
@article{arxiv.0901.2504,
title = {Parton Distributions},
author = {M. Dittmar and S. Forte and A. Glazov and S. Moch and G. Altarelli and J. Anderson and R. D. Ball and G. Beuf and M. Boonekamp and H. Burkhardt and F. Caola and M. Ciafaloni and D. Colferai and A. Cooper-Sarkar and A. de Roeck and L. Del Debbio and J. Feltesse and F. Gelis and J. Grebenyuk and A. Guffanti and V. Halyo and J. I. Latorre and V. Lendermann and Gang Li and L. Motyka and T. Petersen and A. Piccione and V. Radescu and M. Rogal and J. Rojo and C. Royon and G. P. Salam and D. Salek and A. M. Stasto and R. S. Thorne and M. Ubiali and J. A. M. Vermaseren and A. Vogt and G. Watt and C. D. White},
journal= {arXiv preprint arXiv:0901.2504},
year = {2009}
}
Comments
99 pages, 61 figures; summary report of Working Group I for the HERA-LHC workshop. Requires cernrep.cls and mcite.sty. Various typos corrected