High energy QCD and hard diffraction at HERA versus Tevatron

We present and discuss two different topics where Tevatron and HERA data can be compared directly. A method allowing for a direct comparison of data with theoretical predictions is proposed for forward jet production at HERA. An application to the determination of the effective Pomeron intercept in the BFKL-LO parametrization from $d\sigma/dx$ data at HERA leads to a good fit with a significantly high effective intercept, $\alpha_P= 1.43 \pm 0.025 (stat.) \pm 0.025 (syst.)$. It is less than the value of the pomeron intercept using dijets with large rapidity intervals obtained at Tevatron. In a second part of this report, we make comparison between diffractive results at HERA and at Tevatron. We first give the parton distributions in the pomeron extracted from HERA data, and compare with hard single diffraction at Tevatron and diffractive dijets with a leading antiproton data.Comment: 10 pages, review talk given at the Workshop on Light-Cone QCD and Nonperturbative Hadron Physics, December 13-22 1999, Adelaide, Australi

Forward physics with tagged protons at the LHC: QCD and anomalous couplings

We present some physics topics that can be studied at the LHC using proton tagging. We distinguish the QCD (Pomeron structure, BFKL analysis...) from the exploratory physics topics (HIggs boson, anomalous couplings between photons and $W/Z$ bosonsComment: Proceedings of the Low x 2013 workshop, May 30 - June 4 2013, Rehovot and Eilat, Israe

Project to install roman pot detectors at 220 m in ATLAS

We give a short description of the project to install roman pot detectors at 220 m from the interaction point in ATLAS. This project is dedicated to hard diffractive measurements at high luminosity.Comment: Proceedings for the DIS 2007 workshop, Munich, April 200