Polarized structure function {sigma}{sub LT{sup '}} for {sup 1}H(e-vector,e{sup '}K{sup +}){lambda} in the nucleon resonance region

• Published in: Physical review. C, Nuclear physics Vol. 77; no. 6
• Main Authors: Nasseripour, R., University of South Carolina, Columbia, South Carolina 29208, Raue, B. A., Ambrozewicz, P., Moteabbed, M., Carman, D. S., Avakian, H., Boiarinov, S., Brooks, W. K., Burkert, V. D., Cords, D., Degtyarenko, P. V., Deur, A., Guo, L., Gyurjyan, V., Ito, M. M., Lawrence, D., Manak, J. J., Mecking, B. A., Mestayer, M. D., Niczyporuk, B. B.
• Format: Journal Article
• Language: English
• Published: United States 15-06-2008
• Subjects: CENTER-OF-MASS SYSTEM; COMPARATIVE EVALUATIONS; FORECASTING; GEV RANGE 01-10; HYDROGEN 1; INTERFERENCE; KAONS; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEONS; RESONANCE; S CHANNEL; SIMULATION; STRUCTURE FUNCTIONS
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PHYSREVC.77.065208

The first measurements of the polarized structure function {sigma}{sub LT{sup '}} for the reaction {sup 1}H(e-vector,e{sup '}K{sup +}){lambda} in the nucleon resonance region are reported. Measurements are included from threshold up to W=2.05 GeV for central values of Q{sup 2} of 0.65 and 1.00 GeV{sup 2}, and nearly the entire kaon center-of-mass angular range. {sigma}{sub LT{sup '}} is the imaginary part of the longitudinal-transverse response and is expected to be sensitive to interferences between competing intermediate s-channel resonances, as well as resonant and nonresonant processes. The results for {sigma}{sub LT{sup '}} are comparable in magnitude to previously reported results from CLAS for {sigma}{sub LT}, the real part of the same response. An intriguing sign change in {sigma}{sub LT{sup '}} is observed in the high Q{sup 2} data at W{approx_equal}1.9 GeV. Comparisons to several existing model predictions are shown.