Year: 2025
Type: article
Abstract: Axion-like particles (ALPs) are well-motivated extensions of the standard model (SM) that appear in numerous new physics scenarios. In this paper, we concentrate on searches for long-lived ALPs predicted by the photophobic scenario at the HL-LHC with the center-of-mass energy $$\sqrt{s}=14$$ s = 14 TeV and the integrated luminosity $${\mathcal {L}}=3~\hbox {ab}^{-1}.$$ L = 3 ab - 1 . We consider the process $$pp \rightarrow \gamma a$$ p p → γ a with the ALP a decaying into a pair of displaced charged leptons and perform a detailed analysis of two types of signals: "Equation missing" and $$.$$ . For the "Equation missing" signal, we find that the prospective sensitivities of the HL-LHC can reach $$g_{aWW}\in [8.72 \times 10^{-3}, 6.42 \times 10^{-2}]$$ g aWW ∈ [ 8.72 × 10 - 3 , 6.42 × 10 - 2 ] $$\hbox {TeV}^{-1}$$ TeV - 1 for the ALP mass $$m_a \in [4, 10]$$ m a ∈ [ 4 , 10 ] GeV. While for the "Equation missing" signal, the HL-LHC can probe a broader parameter space, with the sensitivities covering $$m_a \in [4, 10]$$ m a ∈ [ 4 , 10 ] GeV and $$g_{aWW} \in [4.17 \times 10^{-3}, 2.00 \times 10^{-1}]$$ g aWW ∈ [ 4.17 × 10 - 3 , 2.00 × 10 - 1
Source: The European Physical Journal C
Institution: Liaoning Normal University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G3884907110, G4194704793, G4654095770
OpenAlex ID: W4417502962