Neutron Elastic Form Factor Ratio from Recoil Polarization

ORAL

Abstract

The GEn-RP experiment with the Super-Bigbite Spectrometer (SBS) setup at Hall-A, Jefferson Lab, measures the ratio of electric to magnetic elastic form factors of the neutron, GEn/GMn using two recoil polarimetry techniques at Q2= 4.5 (Gev/c)2 in quasi-elastic electron-deuterium scattering. Both high-momentum, small-angle neutrons produced during elastic scattering and high-momentum, small-angle protons produced by np-pn (charge exchange) are used to analyze the neutron polarization components upon precessing through a known magnetic field. In addition, low-momentum, large-angle protons produced during np-np elastic scattering are detected, as a proof-of-principle measurement of the analyzing power. This experiment will yield GEn/GMn at the highest kinematic point yet recorded with recoil polarization and the experimental figure-of-merit information on the polarimetry along with the analyzing powers will be used to optimize future measurements of GEn/GMn to reach higher Q2 values using recoil polarimetry techniques.

*This work has been supported by Department of Energy under award DE-SC0013941 and by Jefferson Science Associates, LLC (JSA).

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Presenters

  • Sarashowati Dhital

    • Hampton University

Authors

  • Sarashowati Dhital

    • Hampton University

  • Angel Christopher

    • Hampton University
    • Hampton university

  • David Hamilton

    • University of Glasgow

  • Michael Kohl

    • Hampton University

  • Jesmin Najeer

    • Hampton University

  • Tanvi Patel

    • Hampton University

  • Manjukrishna Suresh

    • Hampton University

  • Will Tiremen

    • Northern Michigan Univ
    • Northen Michigan University

  • Bogdan Wojtsekhowski

    • Jefferson Lab/Jefferson Science Associat
    • University of Virginia