Post-LS3 Experimental Options in ECN3

TL;DR

This paper discusses future experimental options for ECN3 at CERN post-LS3, focusing on upgrades, physics potential, and research directions utilizing the high-energy proton beam from SPS.

Contribution

It presents an overview of proposed long-term experimental options in ECN3, including technical, schedule, and physics considerations, as studied by CERN's PBC group.

Findings

Assessment of beam upgrade requirements

Evaluation of detector R&D and construction plans

Analysis of physics potential within CERN and global context

Abstract

The Experimental Cavern North 3 (ECN3) is an underground experimental cavern on the CERN Pr\'evessin site. ECN3 currently hosts the NA62 experiment, with a physics programme devoted to rare kaon decays and searches of hidden particles approved until Long Shutdown 3 (LS3). Several options are proposed on the longer term in order to make best use of the worldwide unique potential of the high-intensity/high-energy proton beam extracted from the Super Proton Synchrotron (SPS) in ECN3. The current status of their study by the CERN Physics Beyond Colliders (PBC) Study Group is presented, including considerations on beam requirements and upgrades, detector R&D and construction, schedules and cost, as well as physics potential within the CERN and worldwide landscape.