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arXiv · 1905.12953

Non-Resonant Searches for Axion-Like Particles at the LHC

M. B. Gavela·J. M. No·V. Sanz·J. F. de Trocóniz
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Abstract

We propose a new collider probe for axion-like particles (ALPs), and more generally for pseudo-Goldstone bosons: non-resonant searches which take advantage of the derivative nature of their interactions with Standard Model particles. ALPs can participate as off-shell mediators in the $s$-channel of $2 \to 2$ scattering processes at colliders like the LHC. We exemplify the power of this novel type of search by deriving new limits on ALP couplings to gauge bosons via the processes $p p \to Z Z$, $p p \to γγ$ and $p p \to j j$ using Run 2 CMS public data, probing previously unexplored areas of the ALP parameter space. In addition, we propose future non-resonant searches involving the ALP coupling to other electroweak bosons and/or the Higgs particle.

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M. B. Gavela, J. M. No, V. Sanz, J. F. de Trocóniz. 2019-09-10. Non-Resonant Searches for Axion-Like Particles at the LHC. https://doi.org/10.1103/physrevlett.124.051802

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