Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap

C. Cude-Woods; F. M. Gonzalez; E. M. Fries; T. Bailey; M. Blatnik; N. B. Callahan; J. H. Choi; S. M. Clayton; S. A. Currie; M. Dawid; B. W. Filippone; W. Fox; P. Geltenbort; E. George; L. Hayen; K. P. Hickerson; M. A. Hoffbauer; K. Hoffman; A. T. Holley; T. M. Ito; A. Komives; C. Y. Liu; M. Makela; C. L. Morris; R. Musedinovic; C. O'Shaughnessy; R. W. Pattie; J. Ramsey; D. J. Salvat; A. Saunders; E. I. Sharapov; S. Slutsky; V. Su; X. Sun; C. Swank; Z. Tang; W. Uhrich; J. Vanderwerp; P. Walstrom; Z. Wang; W. Wei; A. R. Young

doi:10.1103/PhysRevC.106.065506

Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap

C. Cude-Woods, F. M. Gonzalez, E. M. Fries, T. Bailey, M. Blatnik, N. B. Callahan, J. H. Choi, S. M. Clayton, S. A. Currie, M. Dawid, B. W. Filippone, W. Fox, P. Geltenbort, E. George, L. Hayen, K. P. Hickerson, M. A. Hoffbauer, K. Hoffman, A. T. Holley, T. M. ItoA. Komives, C. Y. Liu, M. Makela, C. L. Morris, R. Musedinovic, C. O'Shaughnessy, R. W. Pattie, J. Ramsey, D. J. Salvat, A. Saunders, E. I. Sharapov, S. Slutsky, V. Su, X. Sun, C. Swank, Z. Tang, W. Uhrich, J. Vanderwerp, P. Walstrom, Z. Wang, W. Wei, A. R. Young

Neutron Symmetries

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Abstract

The past two decades have yielded several new measurements and reanalysis of older measurements of the neutron lifetime. These have led to a 4.4 standard deviation discrepancy between the most precise measurements of the neutron decay rate producing protons in cold neutron beams and the most precise lifetime measured in neutron storage experiments. Measurements using different techniques are important for investigating whether there are unidentified systematic effects in any of the measurements. In this paper we report a new measurement using the Los Alamos asymmetric magneto-gravitational trap where the surviving neutrons are counted external to the trap using the fill and dump method. The new measurement gives a free neutron lifetime of τn=876.3(2.4)stat(0.8)syst. Although this measurement is not as precise, it is in statistical agreement with previous results using in situ counting in the same apparatus.

Original language	English
Article number	065506
Journal	Physical Review C
Volume	106
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.106.065506
State	Published - Dec 2022

Funding

This work was supported by the LANL LDRD Program; the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Awards No. DE-FG02-ER41042, No. DE-AC52-06NA25396, No. DE-AC05-00OR2272, and No. 89233218CNA000001 under proposal LANLEDM; NSF Grants No. 1614545, No. 1914133, No. 1506459, No. 1553861, No. 1812340, No. 1714461, No. 2110898, and No. 1913789; and a NIST precision measurements Grant.

Funders	Funder number
LANL LDRD
National Science Foundation	1714461, 1506459, 1553861, 1914133, 2110898, 1812340, 1913789, 1614545
U.S. Department of Energy
National Institute of Standards and Technology
Office of Science
Nuclear Physics	89233218CNA000001, DE-AC05-00OR2272, DE-AC52-06NA25396, DE-FG02-ER41042

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10.1103/PhysRevC.106.065506

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Cude-Woods, C., Gonzalez, F. M., Fries, E. M., Bailey, T., Blatnik, M., Callahan, N. B., Choi, J. H., Clayton, S. M., Currie, S. A., Dawid, M., Filippone, B. W., Fox, W., Geltenbort, P., George, E., Hayen, L., Hickerson, K. P., Hoffbauer, M. A., Hoffman, K., Holley, A. T., ... Young, A. R. (2022). Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap. Physical Review C, 106(6), Article 065506. https://doi.org/10.1103/PhysRevC.106.065506

@article{90f49ccbfad249f49313e13c38e9d5eb,

title = "Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap",

abstract = "The past two decades have yielded several new measurements and reanalysis of older measurements of the neutron lifetime. These have led to a 4.4 standard deviation discrepancy between the most precise measurements of the neutron decay rate producing protons in cold neutron beams and the most precise lifetime measured in neutron storage experiments. Measurements using different techniques are important for investigating whether there are unidentified systematic effects in any of the measurements. In this paper we report a new measurement using the Los Alamos asymmetric magneto-gravitational trap where the surviving neutrons are counted external to the trap using the fill and dump method. The new measurement gives a free neutron lifetime of τn=876.3(2.4)stat(0.8)syst. Although this measurement is not as precise, it is in statistical agreement with previous results using in situ counting in the same apparatus.",

author = "C. Cude-Woods and Gonzalez, {F. M.} and Fries, {E. M.} and T. Bailey and M. Blatnik and Callahan, {N. B.} and Choi, {J. H.} and Clayton, {S. M.} and Currie, {S. A.} and M. Dawid and Filippone, {B. W.} and W. Fox and P. Geltenbort and E. George and L. Hayen and Hickerson, {K. P.} and Hoffbauer, {M. A.} and K. Hoffman and Holley, {A. T.} and Ito, {T. M.} and A. Komives and Liu, {C. Y.} and M. Makela and Morris, {C. L.} and R. Musedinovic and C. O'Shaughnessy and Pattie, {R. W.} and J. Ramsey and Salvat, {D. J.} and A. Saunders and Sharapov, {E. I.} and S. Slutsky and V. Su and X. Sun and C. Swank and Z. Tang and W. Uhrich and J. Vanderwerp and P. Walstrom and Z. Wang and W. Wei and Young, {A. R.}",

note = "Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

year = "2022",

month = dec,

doi = "10.1103/PhysRevC.106.065506",

language = "English",

volume = "106",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

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Cude-Woods, C, Gonzalez, FM, Fries, EM, Bailey, T, Blatnik, M, Callahan, NB, Choi, JH, Clayton, SM, Currie, SA, Dawid, M, Filippone, BW, Fox, W, Geltenbort, P, George, E, Hayen, L, Hickerson, KP, Hoffbauer, MA, Hoffman, K, Holley, AT, Ito, TM, Komives, A, Liu, CY, Makela, M, Morris, CL, Musedinovic, R, O'Shaughnessy, C, Pattie, RW, Ramsey, J, Salvat, DJ, Saunders, A, Sharapov, EI, Slutsky, S, Su, V, Sun, X, Swank, C, Tang, Z, Uhrich, W, Vanderwerp, J, Walstrom, P, Wang, Z, Wei, W & Young, AR 2022, 'Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap', Physical Review C, vol. 106, no. 6, 065506. https://doi.org/10.1103/PhysRevC.106.065506

TY - JOUR

T1 - Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap

AU - Cude-Woods, C.

AU - Gonzalez, F. M.

AU - Fries, E. M.

AU - Bailey, T.

AU - Blatnik, M.

AU - Callahan, N. B.

AU - Choi, J. H.

AU - Clayton, S. M.

AU - Currie, S. A.

AU - Dawid, M.

AU - Filippone, B. W.

AU - Fox, W.

AU - Geltenbort, P.

AU - George, E.

AU - Hayen, L.

AU - Hickerson, K. P.

AU - Hoffbauer, M. A.

AU - Hoffman, K.

AU - Holley, A. T.

AU - Ito, T. M.

AU - Komives, A.

AU - Liu, C. Y.

AU - Makela, M.

AU - Morris, C. L.

AU - Musedinovic, R.

AU - O'Shaughnessy, C.

AU - Pattie, R. W.

AU - Ramsey, J.

AU - Salvat, D. J.

AU - Saunders, A.

AU - Sharapov, E. I.

AU - Slutsky, S.

AU - Su, V.

AU - Sun, X.

AU - Swank, C.

AU - Tang, Z.

AU - Uhrich, W.

AU - Vanderwerp, J.

AU - Walstrom, P.

AU - Wang, Z.

AU - Wei, W.

AU - Young, A. R.

PY - 2022/12

Y1 - 2022/12

N2 - The past two decades have yielded several new measurements and reanalysis of older measurements of the neutron lifetime. These have led to a 4.4 standard deviation discrepancy between the most precise measurements of the neutron decay rate producing protons in cold neutron beams and the most precise lifetime measured in neutron storage experiments. Measurements using different techniques are important for investigating whether there are unidentified systematic effects in any of the measurements. In this paper we report a new measurement using the Los Alamos asymmetric magneto-gravitational trap where the surviving neutrons are counted external to the trap using the fill and dump method. The new measurement gives a free neutron lifetime of τn=876.3(2.4)stat(0.8)syst. Although this measurement is not as precise, it is in statistical agreement with previous results using in situ counting in the same apparatus.

AB - The past two decades have yielded several new measurements and reanalysis of older measurements of the neutron lifetime. These have led to a 4.4 standard deviation discrepancy between the most precise measurements of the neutron decay rate producing protons in cold neutron beams and the most precise lifetime measured in neutron storage experiments. Measurements using different techniques are important for investigating whether there are unidentified systematic effects in any of the measurements. In this paper we report a new measurement using the Los Alamos asymmetric magneto-gravitational trap where the surviving neutrons are counted external to the trap using the fill and dump method. The new measurement gives a free neutron lifetime of τn=876.3(2.4)stat(0.8)syst. Although this measurement is not as precise, it is in statistical agreement with previous results using in situ counting in the same apparatus.

UR - http://www.scopus.com/inward/record.url?scp=85146137258&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.106.065506

DO - 10.1103/PhysRevC.106.065506

M3 - Article

AN - SCOPUS:85146137258

SN - 2469-9985

VL - 106

JO - Physical Review C

JF - Physical Review C

IS - 6

M1 - 065506

ER -

Fill and dump measurement of the neutron lifetime using an asymmetric magneto-gravitational trap

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