Studies for new experiments at the CERN M2 beamline within "physics beyond colliders": AMBER/COMPASS++, NA64 μ, MuonE

Johannes Bernhard*, Dipanwita Banerjee, Eva Montbarbon, Markus Brugger, Nikolaos Charitonidis, Serhii Cholak, Gian Luigi D'Alessandro, Lau Gatignon, Alexander Gerbershagen, Bastien Rae, Marcel Rosenthal, Maarten Van Dijk, Benjamin Moritz Veit

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

4 Citations (Scopus)

Abstract

The "Physics Beyond Colliders (PBC)" study explores fundamental physics opportunities at the CERN accelerator complex complementary to collider experiments. Three new collaborations aim to exploit the M2 beamline in the North Area with existing high-intensity muon and hadron beams, but also aspire to go beyond the current M2 capabilities with a RF-separated, high-intensity hadron beam, under study. The AMBER/COMPASS++ collaboration proposes an ambitious program with a measurement of the proton radius with muon beams, as well as QCD-related studies from pion PDFs / Drell-Yan to cross section measurements for dark sector searches. Assuming feasibility of the RF-separated beam, the spectrum of strange mesons would enter a high precision era while kaon PDFs as well as nucleon TMDs would be accessible via Drell-Yan reactions. The NA64μ collaboration proposes to search for dark sector mediators such as a dark scalar A′ or a hypothetical Zμ using the M2 muon beam and complementing their on-going A′ searches with electron beams. The MuonE collaboration intends to assess the hadronic component of the vacuum polarization via elastic μ - e scattering, the dominant uncertainty in the determination of gμ - 2. An overview of the three new experimental programs will be presented together with implications for the M2 beamline and the experimental area EHN2, based on the studies of the PBC "Conventional Beams" Working Group.

Original languageEnglish
Title of host publicationProceedings of the 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon
EditorsCurtis Meyer, Reinhard A. Schumacher
PublisherAmerican Institute of Physics Inc.
Number of pages7
ISBN (Electronic)9780735420083
DOIs
Publication statusPublished - 27-Jul-2020
Externally publishedYes
Event15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019 - Pittsburgh, United States
Duration: 2-Jun-20197-Jun-2019

Publication series

NameAIP Conference Proceedings
Volume2249
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2019
Country/TerritoryUnited States
CityPittsburgh
Period02/06/201907/06/2019

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