Charming ALPs

Abstract

Axion-like particles (ALPs) are ubiquitous in models of new physics explaining some of the most pressing puzzles of the Standard Model. However, until relatively recently, little attention has been paid to its interplay with flavour. In this work, we study in detail the phenomenology of ALPs that exclusively interact with up-type quarks at the tree-level, which arise in some well-motivated ultra-violet completions such as QCD-like dark sectors or Froggatt-Nielsen type models of flavour. Our study is performed in the low-energy effective theory to highlight the key features of these scenarios in a model independent way. We derive all the existing constraints on these models and demonstrate how upcoming experiments at fixed-target facilities and the LHC can probe a vast region of the parameter space, which is currently not excluded by cosmological and astrophysical bounds. We also emphasize how a future measurement of the currently unavailable meson decay $D\to \pi +\mathrm{invisible}$ could complement these upcoming searches and help to probe a large unexplored region of their parameter space.

v2: inclusion of constraints from CHARM and SN1987a. 20 pages, 7 figures, 1 table

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Cited by in corpus (20)

• Flavor probes of axion-like particles
• ALPINIST: Axion-Like Particles In Numerous Interactions Simulated and Tabulated
• A Theory of Dark Pions
• Electroweak ALP Searches at a Muon Collider
• Searching for the axion-like particle at the EIC
• Exploring new possibilities to discover a light pseudo-scalar at LHCb
• Phenomenology of axion-like particles with universal fermion couplings -- revisited
• ALP production in weak mesonic decays
• Quark flavor violation and axion-like particles from top-quark decays at the LHC
• Searching for heavy neutral leptons coupled to axion-like particles at the LHC far detectors and SHiP
• Search for light long-lived particles in $pp$ collisions at $\sqrt{s}=13$ TeV using displaced vertices in the ATLAS inner detector
• A comprehensive study of ALPs from $B$-decays
• Reconstructing axion-like particles from beam dumps with simulation-based inference
• Same-Sign Taus Signatures of Maximally Flavor-Violating Scalars at the LHC
• Constraints on axion-like particles using lattice QCD calculations of the rate for $J/\psi \to \gamma a$
• The Forward Physics Facility at the High-Luminosity LHC
• The ALPs from the Top: Searching for long lived axion-like particles from exotic top decays
• Theory, phenomenology, and experimental avenues for dark showers: a Snowmass 2021 report
• Probing charged lepton flavor violation with axion-like particles at Belle II
• Probing invisible particles with charm