X17 discovery potential in γd → e + e − pn at MAGIX@MESA

We propose a direct search experiment for X17 using deuteron photodisintegration, γ d → e + e − pn , at the MAGIX@MESA experiment. X17 is a boson conjectured by the ATOMKI collaboration to explain anomalous signals around 17 MeV in excited 8 Be, 12 C and 4 He nuclear decays. It is the subject of an...

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Published in:EPJ Web of conferences 2024, Vol.303, p.5004
Main Authors: Mommers, Cornelis J.G., Vanderhaeghen, Marc
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description We propose a direct search experiment for X17 using deuteron photodisintegration, γ d → e + e − pn , at the MAGIX@MESA experiment. X17 is a boson conjectured by the ATOMKI collaboration to explain anomalous signals around 17 MeV in excited 8 Be, 12 C and 4 He nuclear decays. It is the subject of an intense, global research program; an experiment at an electron accelerator would complement the ongoing effort to verify X17’s existence. Using the plane-wave impulse approximation around the neutron quasi-free peak, we show that an enhanced X17 signal over the QED background is visible in γ d → e + e − pn , assuming pseudoscalar, vector and axial-vector X17 scenarios. Additionally, we discuss how our calculation may be generalized to searches for a generic dark boson in a photon-deuteron reaction.
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title X17 discovery potential in γd → e + e − pn at MAGIX@MESA
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