4.4 Article

New physics searches with heavy-ion collisions at the CERN Large Hadron Collider

Journal

Publisher

IOP Publishing Ltd
DOI: 10.1088/1361-6471/ab7ff7

Keywords

beyond standard model; heavy ions; LHC

Funding

  1. European Union [750627]
  2. F.R.S.-FNRS under the Excellence of Science (EOS) [30820817]
  3. STFC [ST/P000762/1] Funding Source: UKRI
  4. Marie Curie Actions (MSCA) [750627] Funding Source: Marie Curie Actions (MSCA)

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This document summarises proposed searches for new physics accessible in the heavy-ion mode at the CERN Large Hadron Collider (LHC), both through hadronic and ultraperipheral gamma gamma interactions, and that have a competitive or, even, unique discovery potential compared to standard proton-proton collision studies. Illustrative examples include searches for new particles-such as axion-like pseudoscalars, radions, magnetic monopoles, new long-lived particles, dark photons, and sexaquarks as dark matter candidates-as well as new interactions, such as nonlinear or non-commutative QED extensions. We argue that such interesting possibilities constitute a well-justified scientific motivation, complementing standard quark-gluon-plasma physics studies, to continue running with ions at the LHC after the Run-4, i.e. beyond 2030, including light and intermediate-mass ion species, accumulating nucleon-nucleon integrated luminosities in the accessible fb(-1) range per month.

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