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Consistent interactions for high-spin fermion fields

Tom Vrancx (UGent) , Lesley De Cruz (UGent) , Jan Ryckebusch (UGent) and Pieter Vancraeyveld (UGent)
(2012) AIP Conference Proceedings. 1432. p.361-364
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Abstract
Consistent interactions for off-shell fermion fields of arbitrary spin are constructed from the gauge-invariance requirement of the interaction Lagrangians. These interactions play a crucial role in the quantum hadrodynamical description of high-spin baryon resonances in hadronic processes. We find that the power of the momentum dependence of a consistent interaction rises with the spin of the fermion field. This leads to unphysical structures in the energy dependence of the computed tree-level cross sections when the short-distance physics is cut off with standard hadronic form factors. A novel, spin-dependent hadronic form factor is proposed that suppresses the unphysical artifacts.

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Chicago
Vrancx, Tom, Lesley De Cruz, Jan Ryckebusch, and Pieter Vancraeyveld. 2012. “Consistent Interactions for High-spin Fermion Fields.” In AIP Conference Proceedings, ed. Volker Burkert, Mark Jones, Michael Pennington, and David Richards, 1432:361–364. Melville, NY, USA: American Institute of Physics (AIP).
APA
Vrancx, T., De Cruz, L., Ryckebusch, J., & Vancraeyveld, P. (2012). Consistent interactions for high-spin fermion fields. In V. Burkert, M. Jones, M. Pennington, & D. Richards (Eds.), AIP Conference Proceedings (Vol. 1432, pp. 361–364). Presented at the 8th International workshop on the Physics of Excited Nucleons (Nstar 2011), Melville, NY, USA: American Institute of Physics (AIP).
Vancouver
1.
Vrancx T, De Cruz L, Ryckebusch J, Vancraeyveld P. Consistent interactions for high-spin fermion fields. In: Burkert V, Jones M, Pennington M, Richards D, editors. AIP Conference Proceedings. Melville, NY, USA: American Institute of Physics (AIP); 2012. p. 361–4.
MLA
Vrancx, Tom, Lesley De Cruz, Jan Ryckebusch, et al. “Consistent Interactions for High-spin Fermion Fields.” AIP Conference Proceedings. Ed. Volker Burkert et al. Vol. 1432. Melville, NY, USA: American Institute of Physics (AIP), 2012. 361–364. Print.
@inproceedings{2138277,
  abstract     = {Consistent interactions for off-shell fermion fields of arbitrary spin are constructed from the gauge-invariance requirement of the interaction Lagrangians. These interactions play a crucial role in the quantum hadrodynamical description of high-spin baryon resonances in hadronic processes. We find that the power of the momentum dependence of a consistent interaction rises with the spin of the fermion field. This leads to unphysical structures in the energy dependence of the computed tree-level cross sections when the short-distance physics is cut off with standard hadronic form factors. A novel, spin-dependent hadronic form factor is proposed that suppresses the unphysical artifacts.},
  author       = {Vrancx, Tom and De Cruz, Lesley and Ryckebusch, Jan and Vancraeyveld, Pieter},
  booktitle    = {AIP Conference Proceedings},
  editor       = {Burkert, Volker and Jones, Mark and Pennington, Michael and Richards, David},
  isbn         = {9780735410183},
  issn         = {0094-243X},
  language     = {eng},
  location     = {Newport News, VA, USA},
  pages        = {361--364},
  publisher    = {American Institute of Physics (AIP)},
  title        = {Consistent interactions for high-spin fermion fields},
  url          = {http://dx.doi.org/10.1063/1.3701249},
  volume       = {1432},
  year         = {2012},
}

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