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Resonant probing spin-0 and spin-2 dark matter mediators with fixed target experiments

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arxiv 2304.14052 v2 pith:MIDDW52Q submitted 2023-04-27 hep-ph

Resonant probing spin-0 and spin-2 dark matter mediators with fixed target experiments

classification hep-ph
keywords mediatorsdarkexperimentsfixedldmxmattermechanismna64
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We discuss the mechanism to produce electron-specific dark matter mediators of spin-0 and spin-2 in the electron fixed target experiments such as NA64 and LDMX. The secondary positrons induced by the electromagnetic shower can produce the mediators via annihilation on atomic electrons. That mechanism, for some selected kinematics, results in the enhanced sensitivity with respect to the bounds derived by the bremsstrahlunglike emission of the mediator in the specific parameter space. We derive the corresponding experimental reach of the NA64 and LDMX.

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Cited by 1 Pith paper

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