Unique forbidden beta decays at zero momentum transfer

ORAL

Abstract

I will describe a novel observation in the theory of unique first-forbidden nuclear beta decays, namely the electroweak radiative correction opens up the decay at vanishing nuclear recoil momentum which was forbidden at tree level, leading to a dramatic change in the decay spectrum not anticipated in existing studies. I will discuss its implications for precision tests on the Standard Model and searches for new physics.

*C.-Y.S. and A.G.-M. are supported in part by the U.S. Department of Energy (DOE), Office of Science, Office of Nuclear Physics, under award DE-FG02-97ER41014. Additionally, C.-Y.S. receives support from the FRIB Theory Alliance award DE-SC0013617, and A.G.-M. is supported by the DOE Topical Collaboration "Nuclear Theory for New Physics", award No.DE-SC0023663, and the Hebrew University of Jerusalem through the Dalia and Dan Maydan Post-Doctoral Fellowship. V.C. is supported by the U.S. DOE Office of Science, Office of Nuclear Physics, under Grant No. DE-FG02-00ER41132.

–

Publication: arXiv:2409.18115 [hep-ph]

Presenters

  • Chien Yeah Seng

    • University of Washington

Authors

  • Chien Yeah Seng

    • University of Washington

  • Ayala Glick-Magid

    • University of Washington
    • Institute for Nuclear Theory (INT)

  • Vincenzo Cirigliano

    • University of Washington