Electromagnetic effects and the long-standing three-nucleon analyzing power puzzle

W. Tornow; E. M. Neidel; D. E. González Trotter; C. R. Howell; A. S. Crowell; R. A. Macri; R. L. Walter; G. J. Weisel; J. Esterline; H. Witala; B. J. Crowe; R. S. Pedroni; D. M. Markoff

doi:10.1142/S0217732303010314

Electromagnetic effects and the long-standing three-nucleon analyzing power puzzle

W. Tornow, E. M. Neidel, D. E. González Trotter, C. R. Howell, A. S. Crowell, R. A. Macri, R. L. Walter, G. J. Weisel, J. Esterline, H. Witala, B. J. Crowe, R. S. Pedroni, D. M. Markoff

Division of Mathematics & Natural Sciences (Altoona)

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

1 Scopus citations

Abstract

New results for the neutron-deuteron analyzing power A_y (θ) at E_n = 1.2 and 1.9 MeV and their comparison to proton-deuteron data reveal a sizeable and unexpected difference which increases with decreasing center-of-mass energy. This finding calls for the theoretical treatment of a subtle electromagnetic effect presently not incorporated in rigorous three-nucleon scattering calculations, before it is justified to invoke charge-dependent three-nucleon forces and/or other new physics.

Original language	English (US)
Pages (from-to)	258-261
Number of pages	4
Journal	Modern Physics Letters A
Volume	18
Issue number	2-6
DOIs	https://doi.org/10.1142/S0217732303010314
State	Published - Feb 28 2003

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Astronomy and Astrophysics
General Physics and Astronomy

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Tornow, W., Neidel, E. M., González Trotter, D. E., Howell, C. R., Crowell, A. S., Macri, R. A., Walter, R. L., Weisel, G. J., Esterline, J., Witala, H., Crowe, B. J., Pedroni, R. S., & Markoff, D. M. (2003). Electromagnetic effects and the long-standing three-nucleon analyzing power puzzle. Modern Physics Letters A, 18(2-6), 258-261. https://doi.org/10.1142/S0217732303010314

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title = "Electromagnetic effects and the long-standing three-nucleon analyzing power puzzle",

abstract = "New results for the neutron-deuteron analyzing power Ay (θ) at En = 1.2 and 1.9 MeV and their comparison to proton-deuteron data reveal a sizeable and unexpected difference which increases with decreasing center-of-mass energy. This finding calls for the theoretical treatment of a subtle electromagnetic effect presently not incorporated in rigorous three-nucleon scattering calculations, before it is justified to invoke charge-dependent three-nucleon forces and/or other new physics.",

author = "W. Tornow and Neidel, {E. M.} and {Gonz{\'a}lez Trotter}, {D. E.} and Howell, {C. R.} and Crowell, {A. S.} and Macri, {R. A.} and Walter, {R. L.} and Weisel, {G. J.} and J. Esterline and H. Witala and Crowe, {B. J.} and Pedroni, {R. S.} and Markoff, {D. M.}",

note = "Funding Information: This work was supported in part by the US Department of Energy, Office of High-Energy and Nuclear Physics, under grant No. DE-FG02-97ER41033 and DE-FG02-97ER41042. The authors would like to thank C.R. Jackson, NC A&T State University for helping with data taking. ",

year = "2003",

month = feb,

day = "28",

doi = "10.1142/S0217732303010314",

language = "English (US)",

volume = "18",

pages = "258--261",

journal = "Modern Physics Letters A",

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TY - JOUR

T1 - Electromagnetic effects and the long-standing three-nucleon analyzing power puzzle

AU - Tornow, W.

AU - Neidel, E. M.

AU - González Trotter, D. E.

AU - Howell, C. R.

AU - Crowell, A. S.

AU - Macri, R. A.

AU - Walter, R. L.

AU - Weisel, G. J.

AU - Esterline, J.

AU - Witala, H.

AU - Crowe, B. J.

AU - Pedroni, R. S.

AU - Markoff, D. M.

N1 - Funding Information: This work was supported in part by the US Department of Energy, Office of High-Energy and Nuclear Physics, under grant No. DE-FG02-97ER41033 and DE-FG02-97ER41042. The authors would like to thank C.R. Jackson, NC A&T State University for helping with data taking.

PY - 2003/2/28

Y1 - 2003/2/28

N2 - New results for the neutron-deuteron analyzing power Ay (θ) at En = 1.2 and 1.9 MeV and their comparison to proton-deuteron data reveal a sizeable and unexpected difference which increases with decreasing center-of-mass energy. This finding calls for the theoretical treatment of a subtle electromagnetic effect presently not incorporated in rigorous three-nucleon scattering calculations, before it is justified to invoke charge-dependent three-nucleon forces and/or other new physics.

AB - New results for the neutron-deuteron analyzing power Ay (θ) at En = 1.2 and 1.9 MeV and their comparison to proton-deuteron data reveal a sizeable and unexpected difference which increases with decreasing center-of-mass energy. This finding calls for the theoretical treatment of a subtle electromagnetic effect presently not incorporated in rigorous three-nucleon scattering calculations, before it is justified to invoke charge-dependent three-nucleon forces and/or other new physics.

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EP - 261

JO - Modern Physics Letters A

JF - Modern Physics Letters A

IS - 2-6

ER -

Electromagnetic effects and the long-standing three-nucleon analyzing power puzzle

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