May 29, 2018 to June 3, 2018
Hyatt Regency Indian Wells Conference Center
US/Pacific timezone

Recent Status of Weak-Interaction Tests via Precision Superallowed Beta-Decay Measurements at TRIUMF

May 30, 2018, 5:50 PM
North Foyer | Kachina Room (Hyatt Regency Indian Wells Conference Center)

North Foyer | Kachina Room

Hyatt Regency Indian Wells Conference Center

44600 Indian Wells Lane, Indian Wells, CA 92210, USA


Prof. Kyle Leach (Colorado School of Mines)


Tests of the Standard Model through precision measurements of nuclear decay properties have proven to be a valuable tool in experimental subatomic physics. Of these investigations, $0^+ \to 0^+$ $\beta$-decay decay data are among the most important, as they currently provide the most precise determinations of both the vector coupling strength in the weak interaction, $G_V$, and the up-down element of the CKM quark mixing matrix, $V_{ud}$. These studies also provide some of the best constraints on the possibility of additional quark generations, as well as limits on exotic currents in the weak interaction. The three quantities that are required for performing these tests (branching ratio, half-life, and Q-value) can all be measured to high-precision with rare-isotope beams at the TRIUMF-ISAC facility in Vancouver, Canada. In this talk, I will highlight recent experimental work with both the GRIFFIN spectrometer and the TITAN ion-trap system, as well as theoretical advances towards first-principle nuclear-structure corrections. Finally I will provide a picture of where the remaining critical measurements still reside, and where work at TRIUMF is headed in the near future.
E-mail [email protected]
Collaboration name GRIFFIN and TITAN Collaborations
Funding source This work is supported by the US DOE under grant No. DE-SC0017649 and NSERC (Canada). TRIUMF receives funding via the NRC (Canada).

Primary author

Prof. Kyle Leach (Colorado School of Mines)

Presentation materials