Measurement of the weak mixing angle at a Super Charm-Tau factory with data-driven monitoring of the average electron beam polarization

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Abstract

A method for measuring the average longitudinal polarization of the electron beam at an electron-positron collider operating near the J/ψ resonance is proposed. The method utilizes the differential cross-section of J/ψ→[Λ→pπ−][Λ→p¯π+] decay. It can be used to measure the average longitudinal polarization of electrons with the statistical precision better than 10−3 at a Super Charm-Tau factory operating at the luminosity of 1035 cm−2s−1. The method is discussed in the context of the weak mixing angle measurement in the same experiment.

Original languageEnglish
Article number76
Number of pages30
JournalJournal of High Energy Physics
Volume2020
Issue number3
DOIs
Publication statusPublished - 1 Mar 2020

Keywords

  • e+-e- Experiments
  • Electroweak interaction
  • Polarization
  • e plus -e- Experiments

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