Searching for prompt and long-lived dark photons in electroproduced ${e}^{+}{e}^{\ensuremath{-}}$ pairs with the heavy photon search experiment at JLab

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Searching for prompt and long-lived dark photons in electroproduced $e^{+} e^{-}$ pairs with the heavy photon search experiment at JLab

P. H. Adrian et al.

Phys. Rev. D 108, 012015 – Published 21 July 2023

Abstract

The heavy photon search experiment (HPS) at the Thomas Jefferson National Accelerator Facility searches for electroproduced dark photons. We report results from the 2016 engineering run consisting of $10 608 {nb}^{- 1}$ of data for both the prompt and displaced vertex searches. A search for a prompt resonance in the $e^{+} e^{-}$ invariant mass distribution between 39 and 179 MeV showed no evidence of dark photons above the large QED background, limiting the coupling of $ε^{2} ≳ 10^{- 5}$ , in agreement with previous searches. The search for displaced vertices showed no evidence of excess signal over background in the masses between 60 and 150 MeV, but had insufficient luminosity to limit canonical heavy photon production. This is the first displaced vertex search result published by HPS. HPS has taken high-luminosity data runs in 2019 and 2021 that will explore new dark photon phase space.

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Received 13 January 2023
Accepted 26 June 2023

DOI:https://doi.org/10.1103/PhysRevD.108.012015

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Extensions of gauge sector Particle dark matter

Particles & Fields

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Vol. 108, Iss. 1 — 1 July 2023

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Physical Review D

covering particles, fields, gravitation, and cosmology

Searching for prompt and long-lived dark photons in electroproduced $e^{+} e^{-}$ pairs with the heavy photon search experiment at JLab

P. H. Adrian et al.

Phys. Rev. D 108, 012015 – Published 21 July 2023

Abstract

Physics Subject Headings (PhySH)

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Article Text

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Issue

Physical Review D

covering particles, fields, gravitation, and cosmology

Searching for prompt and long-lived dark photons in electroproduced e+e− pairs with the heavy photon search experiment at JLab

P. H. Adrian et al.

Phys. Rev. D 108, 012015 – Published 21 July 2023

Abstract

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Searching for prompt and long-lived dark photons in electroproduced $e^{+} e^{-}$ pairs with the heavy photon search experiment at JLab