A new twist to the long-standing three-nucleon analyzing power puzzle

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

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)29-34
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - Jan 16 2003

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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