Abstract
The Physics Beyond Colliders initiative is an exploratory study aimed at exploiting the full scientific potential of the CERN’s accelerator complex and scientific infrastructures through projects complementary to the LHC and other possible future colliders. These projects will target fundamental physics questions in modern particle physics. This document presents the status of the proposals presented in the framework of the Beyond Standard Model physics working group, and explore their physics reach and the impact that CERN could have in the next 10–20 years on the international landscape.
Highlights
The PBC beyond the standard model (BSM) study group has considered about 18 different proposals aiming at exploiting the CERN accelerator complex and scientific infrastructure
Three main categories of experiments have been identified, following the New Physics (NP) mass range they are sensitive to: (1) Experiments sensitive to NP with mass in the sub-eV range and very weakly coupled to Standard Model (SM) particles: these are mostly experiments searching for axions and axion-like particles (ALPs) using a large variety of experimental techniques; (2) Experiments sensitive to NP with mass in the MeV–GeV range and very weakly coupled to SM particles: these are accelerator-based experiments that could exploit the large variety of high-intensity high-energy beams currently available or proposed at CERN; (3) Experiments sensitive to NP with mass in the multi-TeV range and strongly coupled to SM particles: these are experiments searching for extremely rare or forbidden processes, that could be produced via high-intensity beams
The PBC–BSM working group has considered about 18 different initiatives which aim at exploiting the CERN accelerator complex and scientific infrastructure with a new, broad and compelling physics program that complement the quest of NP at the TeV scale performed at the Large Hadron Collider (LHC) or other initiatives in the world
Summary
The main goal of this document follows very closely the mandate of the Physics Beyond Colliders (PBC) study group and is ‘an exploratory study aimed at exploiting the full scientific potential of CERN’s accelerator complex and its scientific infrastructure through projects complementary to the LHC, HL-LHC and other possible future colliders. These projects would target fundamental physics questions that are similar in spirit to those. This document presents the status of the proposals presented in the framework of the PBC beyond the standard model (BSM) physics working group, and explore their physics reach and the impact that CERN could have in the 10–20 years on the international landscape
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