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• W4285098495 abstract "A bstract Assuming ALPs couple to gluons only, they can be produced via the pp → aj process and decay into two jets at the LHC. When the coupling parameter, $$ {C}_{overset{sim }{G}} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>C</mml:mi> <mml:mover> <mml:mi>G</mml:mi> <mml:mo>~</mml:mo> </mml:mover> </mml:msub> </mml:math> /f a , is small, the lifetime of ALPs can be long enough leading to displaced final state jets. In this paper, we consider the signal including both the prompt and long-lived cases of ALPs by employing a specialized Delphes module to handle displaced jets. Relevant background processes are generated and simulated at the detector level, and multivariate analyses based on machine-learning are performed to discriminate signal and background events and achieve the best sensitivities. Based on the data accumulated for this study, we forecast the expected upper limits on $$ {C}_{overset{sim }{G}} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>C</mml:mi> <mml:mover> <mml:mi>G</mml:mi> <mml:mo>~</mml:mo> </mml:mover> </mml:msub> </mml:math> /f a for ALP mass m a in the range 5–2300 GeV at 2-, 3- and 5- σ significances at the High Luminosity-LHC with 14 TeV center-of-mass energy and 3 ab −1 integrated luminosity. Vast previously unprobed regions in the parameter space spanned by $$ {C}_{overset{sim }{G}} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>C</mml:mi> <mml:mover> <mml:mi>G</mml:mi> <mml:mo>~</mml:mo> </mml:mover> </mml:msub> </mml:math> /f a and m a are probed and the best upper limits on $$ {C}_{overset{sim }{G}} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>C</mml:mi> <mml:mover> <mml:mi>G</mml:mi> <mml:mo>~</mml:mo> </mml:mover> </mml:msub> </mml:math> /f a at 2- σ significance are found to be around 1 . 0 × 10 −2 TeV −1 for m a ∼ 500 GeV. The ALP mass is reconstructed from the kinematics of final state jets and we find that it is measurable with this method when m a is below about 1 TeV at the HL-LHC. The effects of systematic uncertainties and validation of the EFT framework are also checked and discussed." @default.
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• W4285098495 date "2022-07-01" @default.
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• W4285098495 title "Probing axion-like particles coupling to gluons at the LHC" @default.
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• W4285098495 doi "https://doi.org/10.1007/jhep07(2022)070" @default.
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