ALP inflation and Big Bang on Earth

Abstract

We study a hilltop inflation model where an axion-like particle (ALP) plays the role of the inflaton. We find that, for a broad class of potentials, the decay constant and the mass at the potential minimum satisfy the relation, $m_{\varphi }\sim 10^{-6}f$, to explain the CMB normalization. The ALP is necessarily coupled to the standard model particles for successful reheating. The ALP with the above relation can be searched at beam dump experiments, e.g., the SHiP experiment, if the inflation scale is sufficiently low. In this case, the ALP decays through the interactions that led to the reheating of the Universe. In other words, the Big Bang may be probed at ground-based experiments.

29pages, 7figures, v3: version published in JHEP

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Cited by in corpus (36)

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• Towards early dark energy and $n_s$=1 with Planck, ACT and SPT
• QCD Axion on Hilltop by a Phase Shift of $\pi$
• Light Dark Matter from Inflaton Decay
• Power spectrum of domain-wall network and its implications for isotropic and anisotropic cosmic birefringence
• Challenges for heavy QCD axion inflation
• Stochastic Axion Dark Matter in Axion Landscape
• Strong CP problem and axion dark matter with small instantons
• Trans-Planckian censorship and single-field inflaton potential
• Cosmic Axion Force
• Measuring the Inflaton Coupling in the CMB
• Scale and quality of Peccei-Quinn symmetry and weak gravity conjectures
• Hunting Inflaton at FASER
• Trapping Effect for QCD Axion Dark Matter
• The Stochastic Axiverse
• What if ALP dark matter for the XENON1T excess is the inflaton
• The QCD Axion: A Unique Player in the Axiverse with Mixings
• Direct baryogenesis in the broken phase
• LiteBIRD and CMB-S4 Sensitivities to Reheating in Plateau Models of Inflation
• Thermal production of cold "hot dark matter" around eV
• Early dark energy by dark Higgs, and axion-induced non-thermal trapping
• Phenomenology of CP-even ALP
• Small cosmological constant from a peculiar inflaton potential
• Probing a light dark sector at future lepton colliders via invisible decays of the SM-like and dark Higgs bosons
• Bino-wino coannihilation as a prediction in the $E_7$ unification of families
• Throwing away antimatter via neutrino oscillations during the reheating era
• Warm inflation with a heavy QCD axion
• Connecting Cosmic Inflation to Particle Physics with LiteBIRD, CMB-S4, EUCLID and SKA
• Suppression of Higgs Mixing by Quantum Zeno Effect
• Misalignment production of vector boson dark matter from axion-SU(2) inflation
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• Axion-like particle inflation and dark matter
• Gravitational Wave From Axion-like Particle Inflation
• Resolving the QCD Axion Domain Wall Problem with a Light Axion
• Dissipative Emergence of Inflation from Quasi-Cyclic Universe