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

Jaeckel, Joerg and Spannowsky, Michael (2016) 'Probing MeV to 90 GeV axion-like particles with LEP and LHC.', Physics letters B., 753 . pp. 482-487.


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.

Item Type:Article
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Publisher statement:© 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( Funded by SCOAP3.
Date accepted:12 December 2015
Date deposited:25 January 2017
Date of first online publication:15 December 2015
Date first made open access:No date available

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