Scalar interaction limits from the β-ν correlation of trapped radioactive atoms

  • A. Gorelov
  • , D. Melconian
  • , W. P. Alford
  • , D. Ashery
  • , G. Ball
  • , J. A. Behr
  • , P. G. Bricault
  • , J. M. D'Auria
  • , J. Deutsch
  • , J. Dilling
  • , M. Dombsky
  • , P. Dubé
  • , J. Fingler
  • , U. Giesen
  • , F. Glück
  • , S. Gu
  • , O. Häusser
  • , K. P. Jackson
  • , B. K. Jennings
  • , M. R. Pearson
  • T. J. Stocki, T. B. Swanson, M. Trinczek

Research output: Contribution to journalArticlepeer-review

133 Scopus citations

Abstract

We have set limits on contributions of scalar interactions to nuclear β decay. A magneto-optical trap provides a localized source of atoms suspended in space, so the low-energy recoiling nuclei can freely escape and be detected in coincidence with the β. This allows reconstruction of the neutrino momentum, and the measurement of the β-ν correlation, in a more direct fashion than previously possible. The β-ν correlation parameter of the 0+ → 0+ pure Fermi decay of 38Km is ã= 0.9981 ± 0.0030 -0.0037+0.0032, consistent with the standard model prediction ã = 1.

Original languageEnglish
Article number142501
JournalPhysical Review Letters
Volume94
Issue number14
DOIs
StatePublished - Apr 15 2005

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