HERA-3

TL;DR

HERA-3 explores advanced physics topics like high-density QCD in eA collisions and spin physics with polarized beams, proposing combined experimental approaches and discussing necessary machine and detector upgrades.

Contribution

It introduces a plan to merge high-density QCD studies and spin physics using polarized and unpolarized deuterons at HERA-3.

Findings

Potential to study weak coupling QCD in high-density regimes

Integration of polarized beams enhances spin physics investigations

Machine and detector requirements for HERA-3 are outlined

Abstract

A brief review is given on the physics potential of HERA beyond the presently approved programme. Questions of particular interest include QCD in a regime of weak coupling and high partonic densities achieved in eA collisions and spin physics with polarized colliding beams. Those two distinct programmes can be naturally merged and even substantiated by using polarized and unpolarized deuterons at the starting phase of the HERA-3 run. Basic machine implications and detector requirements are also discussed.