Eliminating detector back action from electron/positron magnetic moment measurements

ORAL

Abstract

Measurements of $g$-factor of an electron and a positron provide the most stringent test of the Standard Model. They are limited by detector back action that damps the single particle motion being detected. We present a quantum calculation that replaces the classical description used to date. We explore the reduced measurement linewidths and new measurement limits that become possible if the detection motion is decoupled from the particle during crucial parts of the measurements.

*Supported by NSF and the Masason Foundation

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Authors

  • Xing Fan

    • Harvard University, Center for Fundamental Physics Northwestern University
    • Department of Physics, Harvard University; Center for Fundamental Physics, Northwestern University

  • Sam Fayer

    • Center for Fundamental Physics Northwestern University

  • Thomas Myers

    • Center for Fundamental Physics Northwestern University

  • Benedict Sukra

    • Center for Fundamental Physics Northwestern University

  • Gerald Gabrielse

    • Center for Fundamental Physics Northwestern University