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Neutron-deuteron breakup experiment at En=13MeV: Determination of the 1S0 neutron-neutron scattering length ann

Publication ,  Journal Article
Gonzalez Trotter, DE; Meneses, FS; Tornow, W; Howell, CR; Chen, Q; Crowell, AS; Roper, CD; Walter, RL; Schmidt, D; Witała, H; Glöckle, W ...
Published in: Physical Review C - Nuclear Physics
January 1, 2006

We report on results of a kinematically complete neutron-deuteron breakup experiment performed at Triangle Universities Nuclear Laboratory using an En=13 MeV incident neutron beam. The 1S0 neutron-neutron scattering length ann has been determined for four production angles of the neutron-neutron final-state interaction configuration. The absolute cross-section data were analyzed with rigorous three-nucleon calculations. Our average value of ann=-18.7±0.7 fm is in excellent agreement with ann=-18.6±0.4 fm obtained from capture experiments of negative pions on deuterons. We also performed a shape analysis of the final-state interaction cross-section enhancements by allowing the normalization of the data to float. From these relative data, we obtained an average value of ann=-18.8±0.5 fm, in agreement with the result obtained from the absolute cross-section measurements. Our result deviates from the world average of ann=-16.7±0.5 fm determined from previous kinematically complete neutron-deuteron breakup experiments, including the most recent one carried out at Bonn. However, this low value for ann is at variance with theoretical expectation and other experimental information about the sign of charge-symmetry breaking of the nucleon-nucleon interaction. In agreement with theoretical predictions, no evidence was found of significant three-nucleon force effects on the neutron-neutron final-state interaction cross sections. © 2006 The American Physical Society.

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Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

January 1, 2006

Volume

73

Issue

3

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

Citation

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Gonzalez Trotter, D. E., Meneses, F. S., Tornow, W., Howell, C. R., Chen, Q., Crowell, A. S., … Šlaus, I. (2006). Neutron-deuteron breakup experiment at En=13MeV: Determination of the 1S0 neutron-neutron scattering length ann. Physical Review C - Nuclear Physics, 73(3). https://doi.org/10.1103/PhysRevC.73.034001
Gonzalez Trotter, D. E., F. S. Meneses, W. Tornow, C. R. Howell, Q. Chen, A. S. Crowell, C. D. Roper, et al. “Neutron-deuteron breakup experiment at En=13MeV: Determination of the 1S0 neutron-neutron scattering length ann.” Physical Review C - Nuclear Physics 73, no. 3 (January 1, 2006). https://doi.org/10.1103/PhysRevC.73.034001.
Gonzalez Trotter DE, Meneses FS, Tornow W, Howell CR, Chen Q, Crowell AS, et al. Neutron-deuteron breakup experiment at En=13MeV: Determination of the 1S0 neutron-neutron scattering length ann. Physical Review C - Nuclear Physics. 2006 Jan 1;73(3).
Gonzalez Trotter, D. E., et al. “Neutron-deuteron breakup experiment at En=13MeV: Determination of the 1S0 neutron-neutron scattering length ann.” Physical Review C - Nuclear Physics, vol. 73, no. 3, Jan. 2006. Scopus, doi:10.1103/PhysRevC.73.034001.
Gonzalez Trotter DE, Meneses FS, Tornow W, Howell CR, Chen Q, Crowell AS, Roper CD, Walter RL, Schmidt D, Witała H, Glöckle W, Tang H, Zhou Z, Šlaus I. Neutron-deuteron breakup experiment at En=13MeV: Determination of the 1S0 neutron-neutron scattering length ann. Physical Review C - Nuclear Physics. 2006 Jan 1;73(3).

Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

January 1, 2006

Volume

73

Issue

3

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics