Data collected at the $e^+p$ collider HERA at DESY by the experiments H1 and ZEUS have allowed to probe a previously inaccessible domain of very large $Q^2$ in deep-inelastic $ep$ scattering. For $Q^2 > 15000 GeV^2$ both experiments see more events than expected assuming the Standard Model of deep-inelastic scattering. In this report the observed events, the theoretical expectations and their comparison are discussed.
WAGNER, A. (1998) "Observation of Events at Very High Q^2 in e^+p Collisions at HERA," Turkish Journal of Physics: Vol. 22: No. 7, Article 1. Available at: https://journals.tubitak.gov.tr/physics/vol22/iss7/1