Diffraction and photon exchange processes at the LHC and parton saturation

We present a review of the recent theoretical and experimental developments related to the field of diffraction, parton saturation, and forward physics. We first discuss our present understanding of the proton structure in terms of quarks and gluons, the degrees of freedom of quantum chromodynamics. We then focus on some of the main results on diffraction at the HERA electron–proton collider in DESY, Germany, at the Tevatron proton–antiproton collider at Fermilab, Batavia, US, and at the CERN Large Hadron Collider (LHC) proton–proton and nucleus–nucleus collider, which is located in Geneva, Switzerland. We also present a selected amount of results on diffraction and photon exchanges that can be done at the LHC experiments and at a future Electron Ion Collider (EIC) to be built in the US at Brookhaven National Laboratory, New York.

Forward physics results on jet production and energy flow at the LHC

In this paper, we present a review of forward physics measurements performed with LHC Runs 1 and 2 data. In particular, measurements based on proton–proton collisions with different center-of-mass energies (0.9–13 TeV) are reviewed. We focus on measurements exploring the forward phase space using the available instrumentation at the different LHC experiments, and report on forward jet and forward energy flow measurements.

CASTOR: A Calorimeter for Forward Physics at the CMS Experiment, CERN.

In the search for Strange Quark Matter (SQM) and Exotic objects in Heavy Ion collisions at high energy, a new Electromagnetic plus Hadronic calorimeter, the CASTOR (Centauros And STrange Objects Research) calorimeter is now under construction. This calorimeter will operate in the experiment CMS at the LHC collider at CERN and is designed for the detection of Strange and Exotic objects at heavy ion collisions. Beam tests of two prototypes in the years 2003, 2004 and 2007 showed a good behavior of the instrument.