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Consistent interactions for high-spin fermion fields

Vrancx, Tom, De Cruz, Lesley, Ryckebusch, Jan UGent and Vancraeyveld, Pieter UGent (2011) PHYSICAL REVIEW C. 84(4).
abstract
We address the issue of consistent interactions for off-shell fermion fields of arbitrary spin. These interactions play a crucial role in the quantum hadrodynamical description of high-spin baryon resonances in hadronic processes. The Rarita-Schwinger (R-S) description of high-spin fermion fields involves unphysical degrees of freedom associated with their lower-spin content. These enter the interaction if not eliminated outright. The invariance condition of the interaction under the unconstrained R-S gauge removes the lower-spin content of the fermion propagator and leads to a consistent description of the interaction. We develop the most general consistent interaction structure for high-spin fermions. 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 spin-dependent hadronic form factor is proposed that suppresses the unphysical artifacts.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
hadron physics, Rarita-Schwinger fields, consistent interactions, hadron form factors
journal title
PHYSICAL REVIEW C
Phys. Rev. C
volume
84
issue
4
article number
045201
pages
16 pages
Web of Science type
Article
Web of Science id
000295540300004
JCR category
PHYSICS, NUCLEAR
JCR impact factor
3.308 (2011)
JCR rank
5/21 (2011)
JCR quartile
1 (2011)
ISSN
0556-2813
DOI
10.1103/PhysRevC.84.045201
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1942830
handle
http://hdl.handle.net/1854/LU-1942830
alternative location
http://arxiv.org/pdf/1105.2688v3
date created
2011-11-16 15:51:13
date last changed
2016-12-21 15:41:25
@article{1942830,
  abstract     = {We address the issue of consistent interactions for off-shell fermion fields of arbitrary spin. These interactions play a crucial role in the quantum hadrodynamical description of high-spin baryon resonances in hadronic processes. The Rarita-Schwinger (R-S) description of high-spin fermion fields involves unphysical degrees of freedom associated with their lower-spin content. These enter the interaction if not eliminated outright. The invariance condition of the interaction under the unconstrained R-S gauge removes the lower-spin content of the fermion propagator and leads to a consistent description of the interaction. We develop the most general consistent interaction structure for high-spin fermions. 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 spin-dependent hadronic form factor is proposed that suppresses the unphysical artifacts.},
  articleno    = {045201},
  author       = {Vrancx, Tom and De Cruz, Lesley and Ryckebusch, Jan and Vancraeyveld, Pieter},
  issn         = {0556-2813},
  journal      = {PHYSICAL REVIEW C},
  keyword      = {hadron physics,Rarita-Schwinger fields,consistent interactions,hadron form factors},
  language     = {eng},
  number       = {4},
  pages        = {16},
  title        = {Consistent interactions for high-spin fermion fields},
  url          = {http://dx.doi.org/10.1103/PhysRevC.84.045201},
  volume       = {84},
  year         = {2011},
}

Chicago
Vrancx, Tom, Lesley De Cruz, Jan Ryckebusch, and Pieter Vancraeyveld. 2011. “Consistent Interactions for High-spin Fermion Fields.” Physical Review C 84 (4).
APA
Vrancx, T., De Cruz, L., Ryckebusch, J., & Vancraeyveld, P. (2011). Consistent interactions for high-spin fermion fields. PHYSICAL REVIEW C, 84(4).
Vancouver
1.
Vrancx T, De Cruz L, Ryckebusch J, Vancraeyveld P. Consistent interactions for high-spin fermion fields. PHYSICAL REVIEW C. 2011;84(4).
MLA
Vrancx, Tom, Lesley De Cruz, Jan Ryckebusch, et al. “Consistent Interactions for High-spin Fermion Fields.” PHYSICAL REVIEW C 84.4 (2011): n. pag. Print.