Probing MeV to 90 GeV axion-like particles with LEP and LHC

Jaeckel, Joerg; Spannowsky, Michael

Abstract

Axion-like particles (ALPs), relatively light (pseudo-)scalars coupled to two gauge bosons, are a common feature of many extensions of the Standard Model. Up to now there has been a gap in the sensitivity to such particles in the MeV to 10 GeV range. In this note we show that LEP data on Z→γγ decays provides significant constraints in this range (and indeed up to the Z -mass). We also discuss the sensitivities of LHC and future colliders. Particularly the LHC shows promising sensitivity in searching for a pseudo-scalar with 4≲ma≲60 GeV in the channel pp→3γ with m3γ≈mZ.

Citation

Jaeckel, J., & Spannowsky, M. (2016). Probing MeV to 90 GeV axion-like particles with LEP and LHC. Physics Letters B, 753, 482-487. https://doi.org/10.1016/j.physletb.2015.12.037

• Journal Article Type: Article
• Acceptance Date: Dec 12, 2015
• Online Publication Date: Dec 15, 2015
• Publication Date: Feb 10, 2016
• Deposit Date: Nov 10, 2016
• Publicly Available Date: Jan 25, 2017
• Journal: Physics Letters B
• Print ISSN: 0370-2693
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 753
• Pages: 482-487
• DOI: https://doi.org/10.1016/j.physletb.2015.12.037