Searching for Tensor Currents in the Weak Interaction Using $^{8}$Li $\beta$ Decay

ORAL

Abstract

Precision beta-neutrino correlation measurements are often used as a broadband test for New Physics by limiting interaction contributions other than the vector-axial vector structure the Standard Model requires. We present the results of a pure Gamow-Teller $\beta-\nu$ correlation coefficient (a$_{\beta\nu}$) measurement via the beta decay of $^{8}$Li, which is sensitive to tensor currents. This data set was taken at Argonne National Lab with the Beta decay Paul Trap (BPT) and surpasses the statistics of our previous limit-defining $^{8}$Li experiment by an order of magnitude. With the analysis nearing its conclusion, we intend to push the low energy limit of a$_{\beta\nu}$’s relative uncertainty into the 0.1 percent range.

*We acknowledge NSERC, Canada, App. No. 216974, the U.S. DOE Contract No. DE-AC02-06CH11357 [ANL] and DE-AC52-07NA27344 [LLNL], NSF grant no. 1144082 and the ANL ATLAS facility

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Authors

  • M.T. Burkey

    • University of Chicago, Argonne National Laboratory

  • G. Savard

    • University of Chicago, Argonne National Laboratory

  • R.E. Segel

    • Northwestern University

  • J.A. Clark

    • Argonne National Laboratory

  • J. Klimes

    • Argonne National Laboratory

  • N.D. Scielzo

    • Lawrence Livermore National Laboratory

  • A.T. Gallant

    • Lawrence Livermore National Laboratory

  • K. Kolos

    • Lawrence Livermore National Laboratory

  • S.W. Padgett

    • Lawrence Livermore National Laboratory

  • B.S. Wang

    • Lawrence Livermore National Laboratory

  • T. Hirsh

    • Soreq NRC, Yavne 81800, Israel

  • R. Orford

    • McGill University

  • E. Heckmaier

    • University of California, Irvine

  • J. Pierce

    • University of Chicago

  • L. Varriano

    • University of Chicago

  • D. Burdette

    • University of Notre Dame

  • S.T. Marley

    • Louisiana State University

  • G. Morgan

    • Louisiana State University

  • K.S. Sharma

    • University of Manitoba