Tensor interaction constraints from beta decay recoil spin asymmetry of trapped atoms

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dc.creatorPitcairn, J. R. A.
dc.creatorRoberge, D.
dc.creatorGorelov, A.
dc.creatorAshery, D.
dc.creatorAviv, O.
dc.creatorBehr, J. A.
dc.creatorBricault, P. G.
dc.creatorDombsky, M.
dc.creatorHolt, J. D.
dc.creatorJackson, K. P.
dc.creatorLee, B.
dc.creatorPearson, M. R.
dc.creatorGaudin, A.
dc.creatorDej, B.
dc.creatorHöhr, C.
dc.creatorGwinner, G.
dc.creatorMelconian, D.
dc.date2008-11-01
dc.date2009-02-16
dc.date.accessioned2026-07-07T13:08:41Z
dc.date.available2026-07-07T13:08:41Z
dc.descriptionWe have measured the angular distribution of recoiling daughter nuclei emitted from the Gamow-Teller $β$ decay of spin-polarized $^{80}$Rb. The asymmetry of this distribution vanishes to lowest order in the Standard Model (SM) in pure Gamow-Teller decays, producing an observable very sensitive to new interactions. We measure the non-SM contribution to the asymmetry to be $A_{T}$= 0.015 $\pm$ 0.029 (stat) $\pm$ 0.019 (syst), consistent with the SM prediction. We constrain higher-order SM corrections using the measured momentum dependence of the asymmetry, and their remaining uncertainty dominates the systematic error. Future progress in determining the weak magnetism term theoretically or experimentally would reduce the final errors. We describe the resulting constraints on fundamental 4-Fermi tensor interactions.
dc.description11 pages, 13 figures; v2 published in Phys. Rev. C, with referee clarifications and figures improved for black-and-white
dc.identifierhttps://arxiv.org/abs/0811.0052
dc.identifierhttp://arxiv.org/abs/0811.0052
dc.identifierPhys.Rev.C79:015501,2009
dc.identifierdoi:10.1103/PhysRevC.79.015501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228497
dc.subjectNuclear Experiment
dc.titleTensor interaction constraints from beta decay recoil spin asymmetry of trapped atoms
dc.typetext

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