Searches for electroweak singlets at future plasma wakefield colliders
Abstract
We study the sensitivity of future 10 TeV plasma wakefield colliders to a real electroweak singlet scalar S coupled to the Standard Model through the Higgs portal. Using luminosity spectra obtained from particle-in-cell simulations, we compare e+e- and e-e- configurations with both flat and round beam profiles, as well as a γγ collider based on Compton backscattering of laser photons off the e-e- beams. The e-e- and γγ options avoid the open challenge of accelerating positrons in plasma. Without a positron beam, however, the vector boson fusion channels e+e-→νν̅S and e+e-→νν̅SS, which dominate at e+e- colliders, can only proceed through secondary positrons and are heavily suppressed. At a γγ collider, this loss in signal rate is partially compensated by additional photon-initiated processes. While the e-e- configurations are not as competitive, both the e+e- and γγ wakefield options have a reach qualitatively similar to that of a 10 TeV muon collider and the FCC-hh. Between the two, the γγ option gives the stronger sensitivity if the achievable geometric luminosities of e+e- colliders are more than a factor of ∼3 lower than that of the γγ collider.
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BibTeX
@misc{chigusa2026searches,
title = {{Searches for electroweak singlets at future plasma wakefield colliders}},
author = {So Chigusa and Simon Knapen and Toby Opferkuch and Inbar Savoray and Christiane Scherb and Weishuang Linda Xu},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.07056},
eprint = {2611.07056},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.07056},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Searches for electroweak singlets at future plasma wakefield colliders
AU - So Chigusa
AU - Simon Knapen
AU - Toby Opferkuch
AU - Inbar Savoray
AU - Christiane Scherb
AU - Weishuang Linda Xu
PY - 2026
DA - 2026/11/04
PB - arXiv
DO - 10.48550/arxiv.2611.07056
UR - https://arxiv.org/abs/2611.07056
AB - We study the sensitivity of future 10 TeV plasma wakefield colliders to a real electroweak singlet scalar S coupled to the Standard Model through the Higgs portal. Using luminosity spectra obtained from particle-in-cell simulations, we compare e^+e^- and e^-e^- configurations with both flat and round beam profiles, as well as a γγ collider based on Compton backscattering of laser photons off the e^-e^- beams. The e^-e^- and γγ options avoid the open challenge of accelerating positrons in plasma. Without a positron beam, however, the vector boson fusion channels e^+e^-→νν̅S and e^+e^-→νν̅SS, which dominate at e^+e^- colliders, can only proceed through secondary positrons and are heavily suppressed. At a γγ collider, this loss in signal rate is partially compensated by additional photon-initiated processes. While the e^-e^- configurations are not as competitive, both the e^+e^- and γγ wakefield options have a reach qualitatively similar to that of a 10 TeV muon collider and the FCC-hh. Between the two, the γγ option gives the stronger sensitivity if the achievable geometric luminosities of e^+e^- colliders are more than a factor of ∼3 lower than that of the γγ collider.
ER -