Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session FD: Electroweak Experiment and Theory
9:00 AM–11:30 AM,
Friday, October 26, 2018
Hilton
Room: Kohala 3
Chair: Dinko Pocanic, University of Virginia
Abstract ID: BAPS.2018.HAW.FD.2
Abstract: FD.00002 : Limiting Tensor Currents in the Electron-Antineutrino Correlation of Lithium-8 Beta Decay*
9:15 AM–9:30 AM
Presenter:
Mary Burkey
(Univ of Chicago, Argonne Natl Lab)
Authors:
Mary Burkey
(Univ of Chicago, Argonne Natl Lab)
Guy Savard
(Argonne Natl Lab)
Nicholas David Scielzo
(Lawrence Livermore Natl Lab)
Aaron Gallant
(Lawrence Livermore Natl Lab)
Jason A Clark
(Argonne Natl Lab)
Tsviki Hirsh
(Soreq NRC)
Ralph Segel
(Northwestern Univesity)
Rodney Orford
(McGill Univ)
Barbara Wang
(Univ of California - Berkeley)
Elizabeth K Heckmaier
(Univ of California - Irvine)
Daniel P Burdette
(Univ of Notre Dame)
Jacob Pierce
(Univ of Chicago, Argonne Natl Lab)
Louis Varriano
(Univ of Chicago, Argonne Natl Lab)
Jeffrey Klimes
(Argonne Natl Lab)
Graeme Morgan
(Louisiana State Univ - Baton Rouge)
Scott T Marley
(Louisiana State Univ - Baton Rouge)
Kay Kolos
(Lawrence Livermore Natl Lab)
Stephen Padgett
(Lawrence Livermore Natl Lab)
Kumar Sharma
(University of Manitobia)
High-precision measurements of the beta-neutrino correlation coefficient (a) have long been used as a probe for New Physics due to the constant’s sensitivity to scalar and tensor currents, both predicted to be 0 by the Standard Model’s electroweak interaction. With a high Q-value, the delayed alpha emission from the daughter nucleus, and an essentially pure Gamow-Teller structure, the beta decay of Lithium-8 is a highly suitable reaction for measuring a. Utilizing stopped Lithium-8 ions in a Paul Trap surrounded by silicon strip detectors backed with plastic scintillators, the full kinematics of each decay product can be reconstructed. Upon completing the analysis of a high-statistics dataset of 2 million full Lithium-8 decays obtained in 2016, we are well positioned to constrain tensor currents in the weak interaction to approximately 0.2 percent, the most stringent limit yet achieved in the low energy regime.
*We acknowledge NSERC, Canada, App. No. 216974, the U.S. DOE Contract No. DE-AC02-06CH11357 [ANL] and DE-AC52-07NA27344 [LLNL], NSF grant no. 1144082 and the ANL ATLAS facility
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.FD.2
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