Improved Neutron Lifetime Measurement with

F. M. Gonzalez; E. M. Fries; C. Cude-Woods; T. Bailey; M. Blatnik; L. J. Broussard; N. B. Callahan; J. H. Choi; S. M. Clayton; S. A. Currie; M. Dawid; E. B. Dees; 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/PhysRevLett.127.162501

Improved Neutron Lifetime Measurement with

F. M. Gonzalez, E. M. Fries, C. Cude-Woods, T. Bailey, M. Blatnik, L. J. Broussard, N. B. Callahan, J. H. Choi, S. M. Clayton, S. A. Currie, M. Dawid, E. B. Dees, B. W. Filippone, W. Fox, P. Geltenbort, E. George, L. Hayen, K. P. Hickerson, M. A. Hoffbauer, K. HoffmanA. 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

Neutron Symmetries

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101 Scopus citations

Abstract

We report an improved measurement of the free neutron lifetime using the apparatus at the Los Alamos Neutron Science Center. We count a total of approximately surviving ultracold neutrons (UCNs) after storing in ’s magnetogravitational trap over two data acquisition campaigns in 2017 and 2018. We extract from three blinded, independent analyses by both pairing long and short storage time runs to find a set of replicate measurements and by performing a global likelihood fit to all data while self-consistently incorporating the -decay lifetime. Both techniques achieve consistent results and find a value . With this sensitivity, neutron lifetime experiments now directly address the impact of recent refinements in our understanding of the standard model for neutron decay.

Original language	English
Article number	162501
Journal	Physical Review Letters
Volume	127
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.127.162501
State	Published - Oct 15 2021

Funding

Los Alamos National Laboratory Laboratory Directed Research and Development U.S. Department of Energy Office of Science Nuclear Physics National Science Foundation This work is 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 LANLEEDM; NSF Grants No. 1614545, No. 1914133, No. 1506459, No. 1553861, No. 1812340, No. 1714461, and No. 1913789; and NIST precision measurements grant.

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Gonzalez, F. M., Fries, E. M., Cude-Woods, C., Bailey, T., Blatnik, M., Broussard, L. J., Callahan, N. B., Choi, J. H., Clayton, S. M., Currie, S. A., Dawid, M., Dees, E. B., Filippone, B. W., Fox, W., Geltenbort, P., George, E., Hayen, L., Hickerson, K. P., Hoffbauer, M. A., ... Young, A. R. (2021). Improved Neutron Lifetime Measurement with. Physical Review Letters, 127(16), Article 162501. https://doi.org/10.1103/PhysRevLett.127.162501

@article{5f8421146404425eb8ce585472d86772,

title = "Improved Neutron Lifetime Measurement with",

abstract = "We report an improved measurement of the free neutron lifetime using the apparatus at the Los Alamos Neutron Science Center. We count a total of approximately surviving ultracold neutrons (UCNs) after storing in {\textquoteright}s magnetogravitational trap over two data acquisition campaigns in 2017 and 2018. We extract from three blinded, independent analyses by both pairing long and short storage time runs to find a set of replicate measurements and by performing a global likelihood fit to all data while self-consistently incorporating the -decay lifetime. Both techniques achieve consistent results and find a value . With this sensitivity, neutron lifetime experiments now directly address the impact of recent refinements in our understanding of the standard model for neutron decay.",

author = "Gonzalez, {F. M.} and Fries, {E. M.} and C. Cude-Woods and T. Bailey and M. Blatnik and Broussard, {L. J.} and Callahan, {N. B.} and Choi, {J. H.} and Clayton, {S. M.} and Currie, {S. A.} and M. Dawid and Dees, {E. B.} 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{\textquoteright}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} 2021 American Physical Society",

year = "2021",

month = oct,

day = "15",

doi = "10.1103/PhysRevLett.127.162501",

language = "English",

volume = "127",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Gonzalez, FM, Fries, EM, Cude-Woods, C, Bailey, T, Blatnik, M, Broussard, LJ, Callahan, NB, Choi, JH, Clayton, SM, Currie, SA, Dawid, M, Dees, EB, 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 2021, 'Improved Neutron Lifetime Measurement with', Physical Review Letters, vol. 127, no. 16, 162501. https://doi.org/10.1103/PhysRevLett.127.162501

TY - JOUR

T1 - Improved Neutron Lifetime Measurement with

AU - Gonzalez, F. M.

AU - Fries, E. M.

AU - Cude-Woods, C.

AU - Bailey, T.

AU - Blatnik, M.

AU - Broussard, L. J.

AU - Callahan, N. B.

AU - Choi, J. H.

AU - Clayton, S. M.

AU - Currie, S. A.

AU - Dawid, M.

AU - Dees, E. B.

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 - 2021/10/15

Y1 - 2021/10/15

N2 - We report an improved measurement of the free neutron lifetime using the apparatus at the Los Alamos Neutron Science Center. We count a total of approximately surviving ultracold neutrons (UCNs) after storing in ’s magnetogravitational trap over two data acquisition campaigns in 2017 and 2018. We extract from three blinded, independent analyses by both pairing long and short storage time runs to find a set of replicate measurements and by performing a global likelihood fit to all data while self-consistently incorporating the -decay lifetime. Both techniques achieve consistent results and find a value . With this sensitivity, neutron lifetime experiments now directly address the impact of recent refinements in our understanding of the standard model for neutron decay.

AB - We report an improved measurement of the free neutron lifetime using the apparatus at the Los Alamos Neutron Science Center. We count a total of approximately surviving ultracold neutrons (UCNs) after storing in ’s magnetogravitational trap over two data acquisition campaigns in 2017 and 2018. We extract from three blinded, independent analyses by both pairing long and short storage time runs to find a set of replicate measurements and by performing a global likelihood fit to all data while self-consistently incorporating the -decay lifetime. Both techniques achieve consistent results and find a value . With this sensitivity, neutron lifetime experiments now directly address the impact of recent refinements in our understanding of the standard model for neutron decay.

UR - http://www.scopus.com/inward/record.url?scp=85117394515&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.127.162501

DO - 10.1103/PhysRevLett.127.162501

M3 - Article

C2 - 34723594

AN - SCOPUS:85117394515

SN - 0031-9007

VL - 127

JO - Physical Review Letters

JF - Physical Review Letters

IS - 16

M1 - 162501

ER -

Improved Neutron Lifetime Measurement with

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