APS Logo

Precision Measurements of <sup>8</sup>B Beta Decay to Set Tensor Current Limits and Determine the Neutrino Energy Spectrum

ORAL

Abstract

Studies of the beta decay of 8B provide unique sensitivity to physics beyond the Standard Model and are vital for the interpretation of solar neutrino data. A high-statistics experiment was performed at Argonne National Laboratory using the Beta-decay Paul Trap (BPT) surrounded by four double-sided silicon strip detectors to measure α and β energies from 8B → 8Be(2α) + β + ν . Through precise measurements of the kinematics of the decay products, limits on the exotic tensor current contribution to the weak interaction can be determined. At the same time, the decay product kinematics can be leveraged to reconstruct the undistorted 8B neutrino energy spectrum, a necessary ingredient for precision measurements of neutrino oscillations. Preliminary results for both the tensor current limit and the neutrino spectrum will be presented.

–

Publication: Final results from this analysis will be submitted to Phys. Rev. Lett.

Presenters

  • Brenden Longfellow

    Lawrence Livermore National Laboratory, Lawrence Livermore Natl Lab

Authors

  • Brenden Longfellow

    Lawrence Livermore National Laboratory, Lawrence Livermore Natl Lab

  • Aaron Gallant

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory

  • Tsviki Hirsh

    Soreq NRC, Soreq Nuclear Research Center

  • Mary Burkey

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory

  • Jason A Clark

    Argonne National Laboratory

  • Guy Savard

    Argonne National Laboratory

  • Nicholas D Scielzo

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory

  • Ralph E Segel

    Northwestern University

  • Louis Varriano

    University of Chicago

  • Daniel P Burdette

    University of Notre Dame

  • Maxime Brodeur

    University of Notre Dame

  • Daniel D Lascar

    Northwestern University

  • Peter Mueller

    Argonne National Laboratory

  • Dwaipayan Ray

    University of Manitoba, University of Manitoba / Argonne National Laboratory, University of Manitoba/Argonne National Laboratory, U. Manitoba

  • Kumar S Sharma

    University of Manitoba

  • Adrian A Valverde

    Argonne National Laboratory/University of Manitoba, University of Manitoba/Argonne National Laboratory, University of Manitoba

  • Gemma L Wilson

    Louisiana State University

  • Xinliang L Yan

    Argonne National Laboratory