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Tera-Zooming in on light (composite) axion-like particles

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arxiv 2104.11064 v1 pith:74HB5O3B submitted 2021-04-22 hep-ph

G. Cacciapaglia , A. Deandrea , A.M. Iyer , K. Sridhar This is my paper · ORCID
classification hep-ph
keywords compositealpsaxion-likelightmodelsparticlesphysicstera-z
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abstract

The Tera-Z phase of future $e^+ e^-$ colliders, FCC-ee and CepC, is a goldmine for exploring $Z$ portal physics. We focus on axion-like particles (ALPs) that can be produced via $Z$ decays with a monochromatic photon. As a template model, we consider composite Higgs models with a light pseudo-scalar that couples through the Wess-Zumino-Witten term to the electroweak gauge bosons. For both photophilic and photophobic cases, we show that the Tera-Z can probe composite scales up to $100$s of TeV, well beyond the capability of the LHC and current precision physics. Our results also apply to generic ALPs and, in particular, severely constrain models that explain the muon $g-2$ anomaly.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A comprehensive study of ALPs from $B$-decays

    hep-ph 2024-12 conditional novelty 6.0 of 10

    The paper derives the complete two-loop flavor-changing coupling of axion-like particles to b and s quarks and uses it to set updated limits on f_a in KSVZ, DFSZ and Flaxion models.

  2. Impact of Higgs precision measurements at the LHC and FCC-ee on the spectrum of composite Higgs models

    hep-ph 2026-08 conditional novelty 4.0 of 10

    Using κ_V = cosθ and m_η = m_h/sinθ, Higgs precision data imply singlet mass bounds of about 440 GeV (Run-2), 600 GeV (HL-LHC), and 2 TeV (FCC-ee).

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