Search and identification of Scalar and Vector Leptoquarks at HERA with polarization

TL;DR

This paper explores how polarized electron and proton beams at HERA can be used to detect and distinguish scalar and vector leptoquarks through their effects on deep inelastic scattering observables, providing constraints and identification methods.

Contribution

It presents a detailed analysis of leptoquark effects in polarized deep inelastic scattering and proposes methods for their identification at HERA and TESLA$ imes$HERA.

Findings

Polarization enhances the ability to distinguish leptoquark types.

Constraints on leptoquark scenarios can be improved with high luminosity.

Polarized beams are crucial for complete leptoquark model identification.

Abstract

We analyze the effects of Scalar and Vector Leptoquarks on various observables in electron (positron) - proton deep inelastic scattering. In view of the future program of the HERA collider, with a high luminosity and also with polarization, we present the constraints that can be reached using this facility for several Leptoquark scenarios. We address the question of the identification of the nature of a discovered Leptoquark. We emphasize the relevance of having polarized lepton and proton beams in order to disentangle completely the various Leptoquark models. This study is also relevant in the context of the TESLA$\times$HERA project.