Jul 10 – 17, 2019
Europe/Brussels timezone

Limits on contact interactions and leptoquarks at HERA

Jul 11, 2019, 3:00 PM
Campus Ledeganck - Aud. 1 (Ghent)

Campus Ledeganck - Aud. 1


Parallel talk Searches for New Physics Searches for New Physics


Aleksander Filip Zarnecki (University of Warsaw)


High-precision HERA data corresponding to a luminosity of around 1 fb$^{-1}$ have been used in the framework of $eeqq$ contact interactions (CI) to set limits on possible high-energy contributions beyond the Standard Model to electron-quark scattering. Measurements of the inclusive deep inelastic cross sections in neutral and charged current $ep$ scattering were considered. The analysis of the $ep$ data has been based on simultaneous fits of parton distribution functions including contributions of CI couplings to $ep$ scattering. Several general CI models and scenarios with heavy leptoquarks were considered. Improvements in the description of the inclusive HERA data were obtained for a few models. Since a statistically significant deviation from the Standard Model cannot be established, limits in the TeV range were set on all models considered.

Primary authors

Matthew Wing (University College London) Aleksander Filip Zarnecki (University of Warsaw)

Presentation materials