Journal article
First Full Dalitz Plot Measurement in Neutronβ -Decay using the Nab Spectrometer and Implications for New Physics
Physics Review C, v 113(3), 035501
04 Mar 2026
Abstract
Precision measurements of observables in neutronβ -decay are used to test the Standard Model description of the weak interaction and search for evidence of new physics. The Nab experiment at the Fundamental Neutron Physics Beamline at the Spallation Neutron Source was constructed to measure correlations in neutron decay by utilizing an asymmetric spectrometer and novel detection system to accurately reconstruct the proton momentum and electron energy for eachβ -decay. This work describes the detection of neutronβ -decay products in the Nab spectrometer and presents the first full Dalitz plot representation of the phase space of neutronβ -decay for all electrons >100 keV. In addition, new constraints are placed on a possible excited neutron state, hypothesized to explain the disagreement between the appearance and disappearance neutron lifetime techniques.
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Details
- Title
- First Full Dalitz Plot Measurement in Neutronβ -Decay using the Nab Spectrometer and Implications for New Physics
- Creators
- Francisco M Gonzalez - Oak Ridge National LaboratoryJin Ha Choi - North Carolina State UniversityHimal Acharya - University of KentuckySkylar Clymer - Arizona State UniversityAndrew Hagemeier - University of VirginiaDavid G Mathews - Oak Ridge National LaboratoryAugust Mendelsohn - University of ManitobaAustin Nelsen - University of KentuckyHitesh Rahangdale - University of Tennessee at KnoxvilleLove Richburg - University of Tennessee at KnoxvilleRicardo Alarcon - Arizona State UniversityAriella Atencio - Drexel University, PhysicsStefan Baeßler - Oak Ridge National LaboratoryThomas BaileyNoah Birge - University of Tennessee at KnoxvilleDennis Borissenko - University of VirginiaMichael Bowler - University of VirginiaLeah J Broussard - Oak Ridge National LaboratoryAlbert T Bryant - University of VirginiaJimmy Caylor - University of Tennessee at KnoxvilleTim Chupp - University of MichiganChristopher Crawford - University of KentuckyR. Alston Croley - University of KentuckyMicah Cruz - University of Tennessee at KnoxvilleGeorge Dodson - Massachusetts Institute of TechnologyWenjiang Fan - University of VirginiaDeion Fellers - Lawrence Berkeley National LaboratoryNadia Fomin - University of Tennessee at KnoxvilleEmil Frlež - University of VirginiaMatthew Frost - Oak Ridge National LaboratoryJason Fry - Eastern Kentucky UniversityDuncan Fuehne - University of ChicagoMichael T Gericke - University of ManitobaMichelle Gervais - University of KentuckyCorey Gilbert - Oak Ridge National LaboratoryFerenc Glück - Karlsruhe Institute of TechnologyRebecca Godri - University of Tennessee at KnoxvilleGeoff L Greene - Oak Ridge National LaboratoryWilliam GreeneJosh Hamblen - University of Tennessee at ChattanoogaPaul Harmston - University of Tennessee at KnoxvilleLeendert Hayen - North Carolina State UniversityCarter Hedinger - University of VirginiaChelsea Hendrus - University of MichiganSean Hollander - Oak Ridge National LaboratoryKavish Imam - University of Tennessee at KnoxvilleErik B Iverson - Oak Ridge National LaboratoryAaron Jezghani - Partnership for Advanced Computing in EuropeChenyang Jiang - Oak Ridge National LaboratoryHuangxing Li - University of VirginiaNick Macsai - University of ManitobaMark Makela - Los Alamos National LaboratoryRussell Mammei - University of WinnipegRicky Marshall - University of VirginiaMadelyn Martinez - Arizona State UniversityMark Mccrea - University of KentuckyPat Mcgaughey - Los Alamos National LaboratorySean Mcgovern - University of VirginiaDavid Mclaughlin - University of VirginiaJacqueline Mirabal-MartinezPaul Mueller - Oak Ridge National LaboratoryAndrew Mullins - University of KentuckyWilliam Musk - University of VirginiaJordan O'Kronley - University of Tennessee at KnoxvilleSeppo I Penttilä - Oak Ridge National LaboratoryD. Elliot Perryman - University of Tennessee at KnoxvilleJosh Pierce - Oak Ridge National LaboratoryJason A Pioquinto - University of VirginiaDinko Počanić - University of VirginiaHunter Presley - University of Tennessee at KnoxvilleJohn RamseyGlenn Randall - Arizona State UniversityZachary Raney - University of VirginiaJackson Ricketts - University of Tennessee at ChattanoogaGrant Riley - Los Alamos National LaboratoryAmerico Salas-Bacci - University of VirginiaSepehr Samiei - University of VirginiaAlexander Saunders - Oak Ridge National LaboratoryWolfgang Schreyer - Oak Ridge National LaboratoryE. Mae Scott - University of Tennessee at KnoxvilleThomas Shelton - University of KentuckyAryaman Singh - University of VirginiaAlexander Smith - University of VirginiaErick Smith - Los Alamos National LaboratoryEric Stevens - University of VirginiaR.J Taylor - North Carolina State UniversityLeonard Tinius - University of VirginiaIsaiah Wallace - University of Tennessee at KnoxvilleJonathan Wexler - North Carolina State UniversityW. Scott Wilburn - Los Alamos National LaboratoryA.R Young - North Carolina State UniversityB Zeck - North Carolina State UniversityNab Collaboration
- Publication Details
- Physics Review C, v 113(3), 035501
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:001717758000001
- Other Identifier
- 991022172970604721