Diffractive and photon-induced processes at the LHC: from the odderon discovery, the evidence for saturation to the search for axion-like particles

Abstract

We discuss first the discovery of the odderon by the TOTEM and D0 collaborations. We then describe the gap between jets measurements sensitive to the high gluon density regime and the possible observation of saturation phenomenon in Pb Pb interactions. We also mention the sensitivity to beyond standard model physics and to the production of axion-like particles via photon photon interactions.

Figures (20)

• Figure 1: $p \bar{p}$ elastic $d \sigma/dt$ cross section as a function of $|t|$ measured by the D0 collaboration at 1.96 TeV
• Figure 2: $pp$ elastic $d \sigma/dt$ cross section as a function of $|t|$ measured by the TOTEM collaboration at 2.76, 7, 8 and 13 TeV and extrapolated down to 1.96 TeV in black.
• Figure 3: Definition of the points that are characteristic of the shape of elastic $pp$ cross sections (see text).
• Figure 4: Bump over dip ratio for $pp$ and $p \bar{p}$ elastic cross sections.
• Figure 5: Variation of $t$ and $d\sigma/dt$ values for reference points at $\sqrt{s}=$2.76, 7, 8 and 13 TeV extrapolated down to Tevatron energies $\sqrt{s}=1.96$ TeV.