Skip to content
DraconiticResearch
Search Sources API
197,787 studies31 sourcesUpdated 32 min ago
PreprintCC BY 4.0arXiv

Sensitivity of a Missing-Mass Search for a Light Dark Photon with a Positron Beam on a Hydrogen Target

  • Weizhi Xiong
  • Ashot Gasparian
  • Bogdan Wojtsekhowski
Open at sourcePDFDOICite

Abstract

We present a Geant4-based simulation study of the sensitivity to a light dark photon, A', using a positron beam incident on a thin liquid-hydrogen target and a high-resolution forward electromagnetic calorimeter for final-state photon reconstruction. This study is motivated by ongoing research and development toward a low-energy positron facility at Jefferson Lab. The proposed search employs the missing-mass technique in the annihilation-in-flight process e+e- → γA', providing sensitivity to the A' independently of its decay mode. We evaluate the expected backgrounds from standard QED annihilation and bremsstrahlung processes and present the projected sensitivity to the kinetic-mixing parameter ε2 as a function of the A' mass. The experiment with 500~MeV beam will provide the data for A' mass range 7-19 MeV. The projected sensitivity on ε2 is 4×10−8 at mA'=19~MeV.

Related

  1. Search for dark photon in association with charged leptons at electron-positron colliders
    Dai-Xing Zhang, Chang-Qi Hu, Chun-Yuan Li +2
    arXivPreprintCC BY 4.0Full textHigh-energy & particle physicsarXiv
  2. In-situ Generation of Polarized Attosecond Positron Bunches via Radiation-Wakefield Induced Two-Photon Pairs
    Zhen-Ke Dou, Qian Zhao, Hao-Tian Wang +2
    arXivPreprintarXiv licenceFull textPlasma physicsarXiv
  3. Prospective study of light dark matter search in positron beam mode with DarkSHINE experiment initiative
    Xu-Liang Zhu, Haidar Mas'ud Alfanda, Shu Li +4
    arXivPreprintarXiv licenceFull textHigh-energy & particle physicsarXiv
  4. Search for Sub-GeV Axion-Like Particles at EBES Pilot Run Using 4 GeV Positron Beam at KEK LINAC
    Takahiro Fusayasu, Tomoya Iizawa, Fumihito Ikeda +18
    arXivPreprintarXiv licenceFull textHigh-energy & particle physicsarXiv
  5. Probing the ALP--Photon--Dark Photon Interaction through the Mono-Photon plus Missing-Energy Signature at a Muon Collider
    Chong-Xing Yue, Yang-Yang Bu, Xin-Yang Li +1
    arXivPreprintarXiv licenceFull textHigh-energy & particle physicsarXiv

Cite

BibTeXRIS
BibTeX
@misc{xiong2026sensitivity,
  title = {{Sensitivity of a Missing-Mass Search for a Light Dark Photon with a Positron Beam on a Hydrogen Target}},
  author = {Weizhi Xiong and Ashot Gasparian and Bogdan Wojtsekhowski},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.29159},
  eprint = {2608.29159},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.29159},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Sensitivity of a Missing-Mass Search for a Light Dark Photon with a Positron Beam on a Hydrogen Target
AU  - Weizhi Xiong
AU  - Ashot Gasparian
AU  - Bogdan Wojtsekhowski
PY  - 2026
DA  - 2026/08/29
PB  - arXiv
DO  - 10.48550/arxiv.2608.29159
UR  - https://arxiv.org/abs/2608.29159
AB  - We present a Geant4-based simulation study of the sensitivity to a light dark photon, A', using a positron beam incident on a thin liquid-hydrogen target and a high-resolution forward electromagnetic calorimeter for final-state photon reconstruction. This study is motivated by ongoing research and development toward a low-energy positron facility at Jefferson Lab. The proposed search employs the missing-mass technique in the annihilation-in-flight process e^+e^- → γA', providing sensitivity to the A' independently of its decay mode. We evaluate the expected backgrounds from standard QED annihilation and bremsstrahlung processes and present the projected sensitivity to the kinetic-mixing parameter ε^2 as a function of the A' mass. The experiment with 500~MeV beam will provide the data for A' mass range 7-19 MeV. The projected sensitivity on ε^2 is 4×10^−8 at m_A'=19~MeV.
ER  -