Differential cross section of the p(e ,e'K+) Λ /Σ0 reaction at Q2 = 0 . 5 [(GeV/ c)2]
Abstract
We have performed high resolution mass spectroscopy of hypernuclei with the (e ,e'K+) reaction using the high intensity electron beam of CEBAF at Thomas Jefferson National Accelerator Facility (JLab). Although hyperons electroproduction elementary process at low Q2 is indispensable for the hypernuclear research, both quality and quantity of data in forward angles are far from satisfactory. In the (e ,e'K+) reaction, protons are converted into hyperons, so this makes it possible to measure the cross section of the p(e ,e'K+) Λ /Σ0 reaction on a gas H2 target. We deduced the differential cross section of the p(e ,e'K+) Λ /Σ0 reaction with calibration data of the latest hypernuclear experiment (JLab E12-17-003). These data were collected at Experimental Hall A using two high-resolution magnetic spectrometers, HRS's, and we measured the momentum vectors of the kaons and scattered electrons. They correspond to data sets of W ~= 3 . 0 [GeV] and Q2 ~= 0 . 5 [(GeV/ c)2]. In this presentation, I will report the result of the analysis for the p(e ,e'K+) Λ /Σ0 reaction.
This work is supported by JSPS KAKENHI 18H05459 and 17H01121.- Publication:
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APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- 2020
- Bibcode:
- 2020APS..DNP.DH005O