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K+ Λ electroproduction above the resonance region

Tom Vrancx, Jan Ryckebusch UGent and Jannes Nys UGent (2014) PHYSICAL REVIEW C. 89(6).
abstract
Background: In π+ n and π− p electroproduction, conventional models cannot satisfactory explain the data above the resonance region, in particular the transverse cross section. Although no high-energy L-T-separated cross-section data is available to date, a similar scenario can be inferred for K+ Λ electroproduction. Purpose: Develop a phenomenological model for the p(γ*,K+)Λ reaction at forward angles and high-energies. Propose a universal framework for interpreting charged-kaon and charged-pion electroproduction above the resonance region. Method: Guided by the recent model for charged-pion electroproduction, developed by the authors, a framework for K+ Λ electroproduction at high energies and forward angles is constructed. To this end, a Reggeized background model for K+ Λ photoproduction is first developed. This model is used as a starting base to set up an electroproduction framework. Results: The few available data of the unseparated p(γ*,K+)Λ cross section are well explained by the model. Predictions for the L-T-separation experiment planned with the 12 GeV upgrade at Jefferson Lab are given. The newly-proposed framework predicts an increased magnitude for the transverse structure function, similar to the situation in charged-pion electroproduction. Conclusions: Within a hadronic framework featuring Reggeized background amplitudes, s-channel resonance-parton effects can explain the observed magnitude of the unseparated p(γ*,K+)Λ cross section at high energies and forward angles. Thereby, no hardening of the kaon electromagnetic form factor is required.
Please use this url to cite or link to this publication:
author
organization
alternative title
K+ Lambda electroproduction above the resonance region
year
type
journalArticle (original)
publication status
published
subject
keyword
kaon photoproduction, deep-inelastic scattering, kaon electroproduction, Regge trajectories, kaon electromagnetic form factor, proton electromagnetic transition form factor, DIRECTION, MESONS, KAONS
journal title
PHYSICAL REVIEW C
Phys. Rev. C
volume
89
issue
6
article number
065202
pages
9 pages
Web of Science type
Article
Web of Science id
000336977300006
JCR category
PHYSICS, NUCLEAR
JCR impact factor
3.733 (2014)
JCR rank
4/21 (2014)
JCR quartile
1 (2014)
ISSN
0556-2813
DOI
10.1103/PhysRevC.89.065202
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
4411000
handle
http://hdl.handle.net/1854/LU-4411000
alternative location
http://arxiv.org/abs/arXiv:1404.4156
date created
2014-06-10 10:19:28
date last changed
2016-12-21 15:41:38
@article{4411000,
  abstract     = {Background: In \ensuremath{\pi}+ n and \ensuremath{\pi}\ensuremath{-} p electroproduction, conventional models cannot satisfactory explain the data above the resonance region, in particular the transverse cross section. Although no high-energy L-T-separated cross-section data is available to date, a similar scenario can be inferred for K+ \ensuremath{\Lambda} electroproduction.
Purpose: Develop a phenomenological model for the p(\ensuremath{\gamma}*,K+)\ensuremath{\Lambda} reaction at forward angles and high-energies. Propose a universal framework for interpreting charged-kaon and charged-pion electroproduction above the resonance region.
Method: Guided by the recent model for charged-pion electroproduction, developed by the authors, a framework for K+ \ensuremath{\Lambda} electroproduction at high energies and forward angles is constructed. To this end, a Reggeized background model for K+ \ensuremath{\Lambda} photoproduction is first developed. This model is used as a starting base to set up an electroproduction framework.
Results: The few available data of the unseparated p(\ensuremath{\gamma}*,K+)\ensuremath{\Lambda} cross section are well explained by the model. Predictions for the L-T-separation experiment planned with the 12 GeV upgrade at Jefferson Lab are given. The newly-proposed framework predicts an increased magnitude for the transverse structure function, similar to the situation in charged-pion electroproduction.
Conclusions: Within a hadronic framework featuring Reggeized background amplitudes, s-channel resonance-parton effects can explain the observed magnitude of the unseparated p(\ensuremath{\gamma}*,K+)\ensuremath{\Lambda} cross section at high energies and forward angles. Thereby, no hardening of the kaon electromagnetic form factor is required.},
  articleno    = {065202},
  author       = {Vrancx, Tom and Ryckebusch, Jan and Nys, Jannes},
  issn         = {0556-2813},
  journal      = {PHYSICAL REVIEW C},
  keyword      = {kaon photoproduction,deep-inelastic scattering,kaon electroproduction,Regge trajectories,kaon electromagnetic form factor,proton electromagnetic transition form factor,DIRECTION,MESONS,KAONS},
  language     = {eng},
  number       = {6},
  pages        = {9},
  title        = {K+ \ensuremath{\Lambda} electroproduction above the resonance region},
  url          = {http://dx.doi.org/10.1103/PhysRevC.89.065202},
  volume       = {89},
  year         = {2014},
}

Chicago
Vrancx, Tom, Jan Ryckebusch, and Jannes Nys. 2014. “K+ Λ Electroproduction Above the Resonance Region.” Physical Review C 89 (6).
APA
Vrancx, T., Ryckebusch, J., & Nys, J. (2014). K+ Λ electroproduction above the resonance region. PHYSICAL REVIEW C, 89(6).
Vancouver
1.
Vrancx T, Ryckebusch J, Nys J. K+ Λ electroproduction above the resonance region. PHYSICAL REVIEW C. 2014;89(6).
MLA
Vrancx, Tom, Jan Ryckebusch, and Jannes Nys. “K+ Λ Electroproduction Above the Resonance Region.” PHYSICAL REVIEW C 89.6 (2014): n. pag. Print.