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Production of Dark Sector Particles via Resonant Positron Annihilation on Atomic Electrons

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 28 Jun 2024Embargo end date: 01 Jan 2024 France Publisher:American Physical Society (APS)Journal:Physical Review Letters, volume 132 (issn: 0031-9007, eissn: 1079-7114,

Authors: Fernando Arias-Aragón; Luc Darmé; Giovanni Grilli di Cortona; Enrico Nardi;

doi: 10.1103/physrevlett.132.261801 , 10.48550/arxiv.2403.15387

pmid: 38996315

arXiv: http://arxiv.org/abs/2403.15387

Production of Dark Sector Particles via Resonant Positron Annihilation on Atomic Electrons

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Abstract

Resonant positron annihilation on atomic electrons provides a powerful method to search for light new particles coupled to e+e−. Reliable estimates of production rates require a detailed characterization of electron momentum distributions. We describe a general method that harnesses the target material Compton profile to properly include electron velocity effects in resonant annihilation cross sections. We additionally find that high-Z atoms can efficiently act as particle physics accelerators, providing a density of relativistic electrons that allows one to extend by several times the experimental mass reach. Published by the American Physical Society 2024

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France

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Keywords

electron, velocity, accelerator, momentum spectrum, FOS: Physical sciences, 530, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], coupling, density, cross section, effect, atom, hidden sector, High Energy Physics - Phenomenology, annihilation, resonance, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], relativistic, positron, new particle

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