Low Q2 Kaon Electroproduction at W=2.2 GeV off Hydrogen

Conference · Mon Dec 01 00:00:00 EST 2008

OSTI ID:1997980

Acha, Armando; Markowitz, Pete

A measurement of the H(e,e'K) reaction was performed at Hall A, TJNAF as part of the hypernuclear experiment E94-107. One important ingredient to the hypernuclear cross section calculation is the elementary cross section for production of hyperons, $$\Lambda $$ and $$\Sigma ^{0}$$. This was measured using a hydrogen (i.e. a proton) target. Data was taken at very low Q$$^{2}$$ ($$\sim $$0.07 GeV$$^{2})$$ and W$$\sim $$2.2 GeV. Kaons were detected along the direction of \textbf{q}, the momentum transferred by the incident electron ($$\Theta _{CM}\sim $$6$$^{o})$$. In addition, there is not much data available for electroproduction of hyperons at low Q$$^{2}$$ and $$\Theta _{CM}$$ and the available theoretical models differ a lot in this kinematical region of W. The measurement of the elementary cross section will help not only in the hypernuclear spectroscopy studies but also in constraining existing theoretical models for the elementary reaction. Measurements of the differential cross sections and the $$\Sigma ^{0}$$/$$\Lambda $$ production ratio will be reported as well as their results binned in Q$$^{2}$$ ,W and $$\Theta _{CM}$$ to understand the dependence on these variables. Details of the calculations and results will be shown.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1997980
• Report Number(s): JLAB-PHY-09-1019; DOE/OR/23177-0805
• Resource Relation: Conference: SENDAI08, Sendai, Japan, December 2008
• Country of Publication: United States
• Language: English