First Precision Measurement of the Parity Violating Asymmetry in Cold Neutron Capture on He 3

M. T. Gericke; S. Baeßler; L. Barrón-Palos; N. Birge; J. D. Bowman; J. Calarco; V. Cianciolo; C. E. Coppola; C. B. Crawford; N. Fomin; I. Garishvili; G. L. Greene; G. M. Hale; J. Hamblen; C. Hayes; E. Iverson; M. L. Kabir; M. McCrea; E. Plemons; A. Ramírez-Morales; P. E. Mueller; I. Novikov; S. Penttila; E. M. Scott; J. Watts; C. Wickersham

doi:10.1103/PhysRevLett.125.131803

First Precision Measurement of the Parity Violating Asymmetry in Cold Neutron Capture on He 3

M. T. Gericke
, S. Baeßler
, L. Barrón-Palos
, N. Birge
, J. D. Bowman
, J. Calarco
, V. Cianciolo
, C. E. Coppola
, C. B. Crawford
, N. Fomin
, I. Garishvili
, G. L. Greene
, G. M. Hale
, J. Hamblen
, C. Hayes
, E. Iverson
, M. L. Kabir
, M. McCrea
, E. Plemons
, A. Ramírez-Morales

P. E. Mueller, I. Novikov, S. Penttila, E. M. Scott, J. Watts, C. Wickersham

Producción científica: Article › revisión exhaustiva

14 Citas (Scopus)

Resumen

We report the first precision measurement of the parity-violating asymmetry in the direction of proton momentum with respect to the neutron spin, in the reaction He3(n,p)3H, using the capture of polarized cold neutrons in an unpolarized active He3 target. The asymmetry is a result of the weak interaction between nucleons, which remains one of the least well-understood aspects of electroweak theory. The measurement provides an important benchmark for modern effective field theory and potential model calculations. Measurements like this are necessary to determine the spin-isospin structure of the hadronic weak interaction. Our asymmetry result is APV=[1.55±0.97(stat)±0.24(sys)]×10-8, which has the smallest uncertainty of any hadronic parity-violating asymmetry measurement so far.

Idioma original	English
Número de artículo	131803
Publicación	Physical Review Letters
Volumen	125
N.º	13
DOI	https://doi.org/10.1103/PhysRevLett.125.131803
Estado	Published - sept 2020

Nota bibliográfica

Publisher Copyright:
© 2020 American Physical Society.

Financiación

We gratefully acknowledge the support of the U.S. Department of Energy Office of Nuclear Physics through Grants No. DE-FG02-03ER41258, No. DE-AC05-00OR22725, No. DE-SC0008107 and No. DE-SC0014622, the U.S. National Science Foundation Grant No. PHY-0855584, the Natural Sciences and Engineering Research Council of Canada (NSERC), the Canadian Foundation for Innovation (CFI), the Mexico National Council of Science and Technology (CONACYT) Grant No. 80444, and the UNAM research Grants (PAPIIT) No. IN111913 and No. IN109120. This research used resources of the Spallation Neutron Source of Oak Ridge National Laboratory, a DOE Office of Science User Facility. We also thank Michele Viviani (INFN Pisa) for very fruitful theory discussions and Jack Thomison (ORNL) for his engineering support.

Financiadores	Número del financiador
Oak Ridge National Laboratory
Canada Foundation for Innovation
Natural Sciences and Engineering Research Council of Canada
National Science Foundation Office of International Science and Engineering
Jack Thomison
Universidad Nacional Autónoma de México	IN109120, IN111913
Universidad Nacional Autónoma de México
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	0855584
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China
Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica	80444
Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica
U.S. Department of Energy Office of Nuclear Physics	DE-AC05-00OR22725, DE-SC0008107, DE-FG02-03ER41258, DE-SC0014622

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.125.131803

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Gericke, M. T., Baeßler, S., Barrón-Palos, L., Birge, N., Bowman, J. D., Calarco, J., Cianciolo, V., Coppola, C. E., Crawford, C. B., Fomin, N., Garishvili, I., Greene, G. L., Hale, G. M., Hamblen, J., Hayes, C., Iverson, E., Kabir, M. L., McCrea, M., Plemons, E., ... Wickersham, C. (2020). First Precision Measurement of the Parity Violating Asymmetry in Cold Neutron Capture on He 3. Physical Review Letters, 125(13), Artículo 131803. https://doi.org/10.1103/PhysRevLett.125.131803

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title = "First Precision Measurement of the Parity Violating Asymmetry in Cold Neutron Capture on He 3",

abstract = "We report the first precision measurement of the parity-violating asymmetry in the direction of proton momentum with respect to the neutron spin, in the reaction He3(n,p)3H, using the capture of polarized cold neutrons in an unpolarized active He3 target. The asymmetry is a result of the weak interaction between nucleons, which remains one of the least well-understood aspects of electroweak theory. The measurement provides an important benchmark for modern effective field theory and potential model calculations. Measurements like this are necessary to determine the spin-isospin structure of the hadronic weak interaction. Our asymmetry result is APV=[1.55±0.97(stat)±0.24(sys)]×10-8, which has the smallest uncertainty of any hadronic parity-violating asymmetry measurement so far.",

author = "Gericke, \{M. T.\} and S. Bae{\ss}ler and L. Barr{\'o}n-Palos and N. Birge and Bowman, \{J. D.\} and J. Calarco and V. Cianciolo and Coppola, \{C. E.\} and Crawford, \{C. B.\} and N. Fomin and I. Garishvili and Greene, \{G. L.\} and Hale, \{G. M.\} and J. Hamblen and C. Hayes and E. Iverson and Kabir, \{M. L.\} and M. McCrea and E. Plemons and A. Ram{\'i}rez-Morales and Mueller, \{P. E.\} and I. Novikov and S. Penttila and Scott, \{E. M.\} and J. Watts and C. Wickersham",

note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society.",

year = "2020",

month = sep,

doi = "10.1103/PhysRevLett.125.131803",

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volume = "125",

number = "13",

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Gericke, MT, Baeßler, S, Barrón-Palos, L, Birge, N, Bowman, JD, Calarco, J, Cianciolo, V, Coppola, CE, Crawford, CB, Fomin, N, Garishvili, I, Greene, GL, Hale, GM, Hamblen, J, Hayes, C, Iverson, E, Kabir, ML, McCrea, M, Plemons, E, Ramírez-Morales, A, Mueller, PE, Novikov, I, Penttila, S, Scott, EM, Watts, J & Wickersham, C 2020, 'First Precision Measurement of the Parity Violating Asymmetry in Cold Neutron Capture on He 3', Physical Review Letters, vol. 125, n.º 13, 131803. https://doi.org/10.1103/PhysRevLett.125.131803

TY - JOUR

T1 - First Precision Measurement of the Parity Violating Asymmetry in Cold Neutron Capture on He 3

AU - Gericke, M. T.

AU - Baeßler, S.

AU - Barrón-Palos, L.

AU - Birge, N.

AU - Bowman, J. D.

AU - Calarco, J.

AU - Cianciolo, V.

AU - Coppola, C. E.

AU - Crawford, C. B.

AU - Fomin, N.

AU - Garishvili, I.

AU - Greene, G. L.

AU - Hale, G. M.

AU - Hamblen, J.

AU - Hayes, C.

AU - Iverson, E.

AU - Kabir, M. L.

AU - McCrea, M.

AU - Plemons, E.

AU - Ramírez-Morales, A.

AU - Mueller, P. E.

AU - Novikov, I.

AU - Penttila, S.

AU - Scott, E. M.

AU - Watts, J.

AU - Wickersham, C.

PY - 2020/9

Y1 - 2020/9

N2 - We report the first precision measurement of the parity-violating asymmetry in the direction of proton momentum with respect to the neutron spin, in the reaction He3(n,p)3H, using the capture of polarized cold neutrons in an unpolarized active He3 target. The asymmetry is a result of the weak interaction between nucleons, which remains one of the least well-understood aspects of electroweak theory. The measurement provides an important benchmark for modern effective field theory and potential model calculations. Measurements like this are necessary to determine the spin-isospin structure of the hadronic weak interaction. Our asymmetry result is APV=[1.55±0.97(stat)±0.24(sys)]×10-8, which has the smallest uncertainty of any hadronic parity-violating asymmetry measurement so far.

AB - We report the first precision measurement of the parity-violating asymmetry in the direction of proton momentum with respect to the neutron spin, in the reaction He3(n,p)3H, using the capture of polarized cold neutrons in an unpolarized active He3 target. The asymmetry is a result of the weak interaction between nucleons, which remains one of the least well-understood aspects of electroweak theory. The measurement provides an important benchmark for modern effective field theory and potential model calculations. Measurements like this are necessary to determine the spin-isospin structure of the hadronic weak interaction. Our asymmetry result is APV=[1.55±0.97(stat)±0.24(sys)]×10-8, which has the smallest uncertainty of any hadronic parity-violating asymmetry measurement so far.

UR - https://www.scopus.com/pages/publications/85092802189

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DO - 10.1103/PhysRevLett.125.131803

M3 - Article

C2 - 33034491

AN - SCOPUS:85092802189

SN - 0031-9007

VL - 125

JO - Physical Review Letters

JF - Physical Review Letters

IS - 13

M1 - 131803

ER -

First Precision Measurement of the Parity Violating Asymmetry in Cold Neutron Capture on He 3

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Financiación

ASJC Scopus subject areas

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