Comparison of $pp$ and $p \bar{p}$ differential elastic cross sections and observation of the exchange of a colorless $C$-odd gluonic compound

We describe the discovery of colorless C C -odd gluonic compound, odderon, by D0 and TOTEM Collaborations comparing elastic differential cross sections in pp display="inline">pp p \bar{p} display="inline">pp‾ interactions at high energies.