First Direct Constraints on Fierz Interference in Free-Neutron β Decay

Kevin P. Hickerson; Xiaohui Sun; Yelena Bagdasarova; David Bravo-Berguño; Leah J. Broussard; Peter Brown; Richard Carr; Scott Currie; Xinjian Ding; Bradley W. Filippone; Alejandro García; Peter Geltenbort; J. Todd Hoagland; A. T. Holley; Ran Hong; Takeyasu M. Ito; Andreas Knecht; Chao-Yu Liu; Jiang-Lai Liu; Mark Makela; Russell R. Mammei; J. W. Martin; Dan Melconian; Michael P. Mendenhall; Spencer D. Moore; Christopher L. Morris; Robert W. Pattie; A. Pérez Galván; Ruediger Picker; Margaret L. Pitt; Bradley R. Plaster; John C. Ramsey; Roger H. Rios; A. Saunders; Susan J. Seestrom; Eduard I. Sharapov; Walter E. Sondheim; Erdinch Tatar; R. Bruce Vogelaar; Brittney VornDick; Christopher Wrede; Andrew R. Young; B. A. Zeck

doi:10.1103/PhysRevC.96.059901

First Direct Constraints on Fierz Interference in Free-Neutron β Decay

Kevin P. Hickerson
, Xiaohui Sun
, Yelena Bagdasarova
, David Bravo-Berguño
, Leah J. Broussard
, Peter Brown
, Richard Carr
, Scott Currie
, Xinjian Ding
, Bradley W. Filippone
, Alejandro García
, Peter Geltenbort
, J. Todd Hoagland
, A. T. Holley
, Ran Hong
, Takeyasu M. Ito
, Andreas Knecht
, Chao-Yu Liu
, Jiang-Lai Liu
, Mark Makela

Russell R. Mammei, J. W. Martin, Dan Melconian, Michael P. Mendenhall, Spencer D. Moore, Christopher L. Morris, Robert W. Pattie, A. Pérez Galván, Ruediger Picker, Margaret L. Pitt, Bradley R. Plaster, John C. Ramsey, Roger H. Rios, A. Saunders, Susan J. Seestrom, Eduard I. Sharapov, Walter E. Sondheim, Erdinch Tatar, R. Bruce Vogelaar, Brittney VornDick, Christopher Wrede, Andrew R. Young, B. A. Zeck

California Institute of Technology
Los Alamos National Laboratory
Virginia Tech
Oak Ridge National Laboratory
University of Kentucky
University of Washington
Institut Laue-Langevin, France
North Carolina State University
Tennessee Tech University
Paul Scherrer Institute, Switzerland
Indiana University - Bloomington
University of Winnipeg, Canada
Texas A&M University
Lawrence Livermore National Laboratory
Vertex Pharmaceuticals
TRIUMF Laboratory, Canada
Dubna, JINR
Idaho State University
Tennessee Technological University

Research output: Contribution to journal › Article › peer-review

Abstract

Precision measurements of free-neutron β decay have been used to precisely constrain our understanding of the weak interaction. However, the neutron Fierz interference term b n , which is particularly sensitive to beyond-standard-model tensor currents at the TeV scale, has thus far eluded measurement. Here we report the first direct constraints on this term, finding b n =0.067±0.005 stat +0.090−0.061 sys , consistent with the standard model. The uncertainty is dominated by absolute energy reconstruction and the linearity of the β spectrometer energy response.

Original language	American English
Journal	Physical Review C
Volume	96
DOIs	https://doi.org/10.1103/PhysRevC.96.059901
State	Published - Nov 10 2017
Externally published	Yes

Keywords

Direct Constraints
Fierz Interference
First
Free-Neutron
β Decay

Disciplines

Physics
Nuclear

Access to Document

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Cite this

Hickerson, K. P., Sun, X., Bagdasarova, Y., Bravo-Berguño, D., Broussard, L. J., Brown, P., Carr, R., Currie, S., Ding, X., Filippone, B. W., García, A., Geltenbort, P., Hoagland, J. T., Holley, A. T., Hong, R., Ito, T. M., Knecht, A., Liu, C.-Y., Liu, J.-L., ... Zeck, B. A. (2017). First Direct Constraints on Fierz Interference in Free-Neutron β Decay. Physical Review C, 96. https://doi.org/10.1103/PhysRevC.96.059901

Hickerson, KP, Sun, X, Bagdasarova, Y, Bravo-Berguño, D, Broussard, LJ, Brown, P, Carr, R, Currie, S, Ding, X, Filippone, BW, García, A, Geltenbort, P, Hoagland, JT, Holley, AT, Hong, R, Ito, TM, Knecht, A, Liu, C-Y, Liu, J-L, Makela, M, Mammei, RR, Martin, JW, Melconian, D, Mendenhall, MP, Moore, SD, Morris, CL, Pattie, RW, Galván, AP, Picker, R, Pitt, ML, Plaster, BR, Ramsey, JC, Rios, RH, Saunders, A, Seestrom, SJ, Sharapov, EI, Sondheim, WE, Tatar, E, Vogelaar, RB, VornDick, B, Wrede, C, Young, AR & Zeck, BA 2017, 'First Direct Constraints on Fierz Interference in Free-Neutron β Decay', Physical Review C, vol. 96. https://doi.org/10.1103/PhysRevC.96.059901

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title = "First Direct Constraints on Fierz Interference in Free-Neutron β Decay",

abstract = " Precision measurements of free-neutron β decay have been used to precisely constrain our understanding of the weak interaction. However, the neutron Fierz interference term b n , which is particularly sensitive to beyond-standard-model tensor currents at the TeV scale, has thus far eluded measurement. Here we report the first direct constraints on this term, finding b n =0.067±0.005 stat +0.090−0.061 sys , consistent with the standard model. The uncertainty is dominated by absolute energy reconstruction and the linearity of the β spectrometer energy response. ",

keywords = "Direct Constraints, Fierz Interference, First, Free-Neutron, β Decay",

author = "Hickerson, \{Kevin P.\} and Xiaohui Sun and Yelena Bagdasarova and David Bravo-Bergu{\~n}o and Broussard, \{Leah J.\} and Peter Brown and Richard Carr and Scott Currie and Xinjian Ding and Filippone, \{Bradley W.\} and Alejandro Garc{\'i}a and Peter Geltenbort and Hoagland, \{J. Todd\} and Holley, \{A. T.\} and Ran Hong and Ito, \{Takeyasu M.\} and Andreas Knecht and Chao-Yu Liu and Jiang-Lai Liu and Mark Makela and Mammei, \{Russell R.\} and Martin, \{J. W.\} and Dan Melconian and Mendenhall, \{Michael P.\} and Moore, \{Spencer D.\} and Morris, \{Christopher L.\} and Pattie, \{Robert W.\} and Galv{\'a}n, \{A. P{\'e}rez\} and Ruediger Picker and Pitt, \{Margaret L.\} and Plaster, \{Bradley R.\} and Ramsey, \{John C.\} and Rios, \{Roger H.\} and A. Saunders and Seestrom, \{Susan J.\} and Sharapov, \{Eduard I.\} and Sondheim, \{Walter E.\} and Erdinch Tatar and Vogelaar, \{R. Bruce\} and Brittney VornDick and Christopher Wrede and Young, \{Andrew R.\} and Zeck, \{B. A.\}",

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AU - Hickerson, Kevin P.

AU - Sun, Xiaohui

AU - Bagdasarova, Yelena

AU - Bravo-Berguño, David

AU - Broussard, Leah J.

AU - Brown, Peter

AU - Carr, Richard

AU - Currie, Scott

AU - Ding, Xinjian

AU - Filippone, Bradley W.

AU - García, Alejandro

AU - Geltenbort, Peter

AU - Hoagland, J. Todd

AU - Holley, A. T.

AU - Hong, Ran

AU - Ito, Takeyasu M.

AU - Knecht, Andreas

AU - Liu, Chao-Yu

AU - Liu, Jiang-Lai

AU - Makela, Mark

AU - Mammei, Russell R.

AU - Martin, J. W.

AU - Melconian, Dan

AU - Mendenhall, Michael P.

AU - Moore, Spencer D.

AU - Morris, Christopher L.

AU - Pattie, Robert W.

AU - Galván, A. Pérez

AU - Picker, Ruediger

AU - Pitt, Margaret L.

AU - Plaster, Bradley R.

AU - Ramsey, John C.

AU - Rios, Roger H.

AU - Saunders, A.

AU - Seestrom, Susan J.

AU - Sharapov, Eduard I.

AU - Sondheim, Walter E.

AU - Tatar, Erdinch

AU - Vogelaar, R. Bruce

AU - VornDick, Brittney

AU - Wrede, Christopher

AU - Young, Andrew R.

AU - Zeck, B. A.

PY - 2017/11/10

Y1 - 2017/11/10

N2 - Precision measurements of free-neutron β decay have been used to precisely constrain our understanding of the weak interaction. However, the neutron Fierz interference term b n , which is particularly sensitive to beyond-standard-model tensor currents at the TeV scale, has thus far eluded measurement. Here we report the first direct constraints on this term, finding b n =0.067±0.005 stat +0.090−0.061 sys , consistent with the standard model. The uncertainty is dominated by absolute energy reconstruction and the linearity of the β spectrometer energy response.

AB - Precision measurements of free-neutron β decay have been used to precisely constrain our understanding of the weak interaction. However, the neutron Fierz interference term b n , which is particularly sensitive to beyond-standard-model tensor currents at the TeV scale, has thus far eluded measurement. Here we report the first direct constraints on this term, finding b n =0.067±0.005 stat +0.090−0.061 sys , consistent with the standard model. The uncertainty is dominated by absolute energy reconstruction and the linearity of the β spectrometer energy response.

KW - Direct Constraints

KW - Fierz Interference

KW - First

KW - Free-Neutron

KW - β Decay

U2 - 10.1103/PhysRevC.96.059901

DO - 10.1103/PhysRevC.96.059901

M3 - Article

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