Improved Limits on n → n' Transformation from the Spallation Neutron Source

POSTER

Abstract

Conversions between neutrons n and a Dark Matter mirror neutron n′ has been proposed as a

mechanism for Baryon Number B violation.

In the case that there is a small mass difference Δm or energy difference ΔE between the n and the n′ states, oscillations can be induced by compensating for Δm with a magnetic field.

A search for such neutron oscillations was performed at the Spallation Neutron Source by placing a thin cadmium wafer inside of 6.6 T magnet.

The approach described here saw no regenerated neutrons above background, which provides a new limit for neutron - mirror neutrons transformations for a range of Δm between about 0.1 neV and ~1000 neV.

*Funded by the DOE and NP

Presenters

  • Cary Rock

    • University of Tennessee

Authors

  • Cary Rock

    • University of Tennessee

  • Francisco M Gonzalez

    • ORNL
    • Oak Ridge National Laboratory

  • Leah J Broussard

    • Oak Ridge National Lab

  • Lisa DeBeer-Schmitt

    • ORNL

  • Michael Fitzsimmons

    • ORNL

  • Matthew Frost

    • Oak Ridge National Lab

  • Lawrence H Heilbronn

    • University of Tennessee

  • Erik B Iverson

    • Oak Ridge National Lab

  • Yuri A Kamyshkov

    • University of Tennessee

  • Michael Kline

    • Ohio State University

  • David Milstead

    • Stockholm University

  • Seppo I Penttila

    • Oak Ridge National Lab

  • Devyn Powers

    • University of Tennessee

  • Cary Rock

    • University of Tennessee

  • James Rogers

    • University of Tennessee

  • Valentina Santoro

    • ESS - European Spallation Source

  • Alexander Saunders

    • Oak Ridge National Lab

  • Shaun G Vavra

    • University of Tennessee