• Open Access

Probing light exotics from a hidden sector at cτ factories with polarized electron beams

Dmitry Gorbunov and Dmitry Kalashnikov
Phys. Rev. D 107, 015014 – Published 17 January 2023

Abstract

Future cτ factories are natural places to study extensions of the Standard Model (SM) of particle physics with new long-lived feebly interacting particles light enough to be produced in electron-positron collisions. We investigate prospects of these machines in exploring such extensions emphasizing the role of polarized beams in getting rid of the SM irreducible background for the missing energy signature. We illustrate this on the example of the cτ project in Novosibirsk, where the electron beam is designed to be polarized to achieve much higher sensitivity to hadronic resonances and τ leptons. We investigate models with hidden photons, with millicharged particles (fermions and scalars), with Z bosons and with axionlike particles. We find that the electron beam polarization of 80% significantly improves the chances to observe the signal, especially with large statistics. We outline the regions of the model parameter space which can be reached at this factory in one year and in ten years of operation according with the scientific schedule of tuning the energy of colliding beams.

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  • Received 29 November 2022
  • Accepted 3 January 2023

DOI:https://doi.org/10.1103/PhysRevD.107.015014

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)

Particles & Fields

Authors & Affiliations

Dmitry Gorbunov1,2,* and Dmitry Kalashnikov2,1,†

  • 1Institute for Nuclear Research of the Russian Academy of Sciences, 117312 Moscow, Russia
  • 2Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia

  • *gorby@ms2.inr.ac.ru
  • kalashnikov.d@phystech.edu

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Vol. 107, Iss. 1 — 1 January 2023

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