Beta-decay Paul Trap Mk. IV Commissioning

ORAL

Abstract

The Beta-decay Paul Trap (BPT) at Argonne National Lab measures the beta-neutrino angular correlation coefficient aβν in the decay of Li-8 and B-8 to search for a tensor contribution to the weak interaction, a beyond-Standard Model possibility. The BPT has an ultimate measurement goal of 0.1% uncertainty in aβν. A new BPT Mk. IV has been built and will be commissioned in winter 2022 with Li-8. This new trap reduces systematic uncertainties associated with electron scattering and features other improvements. This talk will present the final design of the trap and results of the commissioning experiment, with preliminary expectations for new limits from a Li-8 data run in spring 2022.

*The authors acknowledge the U.S. DOE under Contract No. DE-AC02-06CH11357 [ANL] and DE-AC52-07NA27344 [LLNL], the NSF under Grant No. PHY-1713857 and DGE-1746045, and NSERC (Canada) under Application No. SAPPJ-2018-00028.

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Presenters

  • Louis Varriano

    • University of Chicago

Authors

  • Louis Varriano

    • University of Chicago

  • Guy Savard

    • Argonne National Laboratory

  • Jason A Clark

    • Argonne National Laboratory

  • Nicholas D Scielzo

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • Daniel P Burdette

    • University of Notre Dame

  • Mary T Burkey

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • Aaron T Gallant

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • Tsviki Y Hirsh

    • Soreq NRC
    • Soreq NRC, Israel

  • Brenden Longfellow

    • Lawrence Livermore National Laboratory