Cross sections and Rosenbluth separations in H-1(e, e ' K[superscript +])Lambda up to Q[superscript 2]=2.35 GeV[superscript 2]
Name
Coman-2010-Cross sections and R.pdf
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271.11 KB
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Checksum (MD5)
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Author(s)
Zheng, Xinying Grace
Dutta, Debarchana
Fissum, K. G.
Gayou, Olivier
Sirca, S.
Zhu, L.
Alternative Title
Cross sections and Rosenbluth separations in H-1(e, e ' K+)Lambda up to Q(2)=2.35 GeV2
Date Issued
May 2010
Journal
Physical Review C
Publisher
American Physical Society
Citation
Jefferson Lab Hall A Collaboration et al. “Cross sections and Rosenbluth separations in H-1(e,e'K[superscript +])Lambda up to Q[superscript 2]=2.35 GeV[superscript 2].” Physical Review C 81.5 (2010): 052201. © 2010 The American Physical Society.
Version
Final published version
Abstract
The kaon electroproduction reaction 1H(e,e′K+)Lambda was studied as a function of the virtual-photon four-momentum, Q[superscript 2], total energy, W, and momentum transfer, t, for different values of the virtual-photon polarization parameter. Data were taken at electron beam energies ranging from 3.40 to 5.75 GeV. The center of mass cross section was determined for twenty-one kinematics corresponding to Q[superscript 2] of 1.90 and 2.35 GeV[superscript 2], and the longitudinal, sigmaL, and transverse, sigmaT, cross sections were separated using the Rosenbluth technique at fixed W and t. The separated cross sections reveal a flat energy dependence at forward kaon angles not satisfactorily described by existing electroproduction models. Influence of the kaon pole on the cross sections was investigated by adopting an off-shell form factor in the Regge model, which better describes the observed energy dependence of sigmaT and sigmaL.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevC.81.052201
