Nuclear transparency and effective kaon-nucleon cross section from the A(e, e'K+) reaction

Nuruzzaman; Dutta, D.; Arrington, J.; Asaturyan, R.; Benmokhtar, F.; Boeglin, W.; Bosted, P.; Bruell, A.; Clasie, B.; Christy, M.E.

doi:10.1103/PhysRevC.84.015210

Nuclear transparency and effective kaon-nucleon cross section from the A(e, e'K+) reaction

Nuruzzaman
(
- Mississippi State U.
)
,
D. Dutta
(
- Mississippi State U.
)
,
J. Arrington
(
- Argonne
)
,
R. Asaturyan
(
- Yerevan Phys. Inst.
)
,
F. Benmokhtar
(
- Maryland U.
)

Mar, 2011

7 pages

Published in:

Phys.Rev.C 84 (2011) 015210

e-Print:

1103.4120 [nucl-ex]

DOI:

10.1103/PhysRevC.84.015210

Report number:

INT-PUB-11-013,
JLAB-PHY-11-1356

View in:

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Abstract: (arXiv)

We have determined the transparency of the nuclear medium to kaons from

A(e,e^{'} K^{+})

measurements on

^{12}

C,

^{63}

Cu, and

^{197}

Au targets. The measurements were performed at the Jefferson Laboratory and span a range in four-momentum-transfer squared Q

^2

=1.1 -- 3.0 GeV

^2

. The nuclear transparency was defined as the ratio of measured kaon electroproduction cross sections with respect to deuterium, (

\sigma^{A}/\sigma^{D}

). We further extracted the atomic number (

A

) dependence of the transparency as parametrized by

T= (A/2)^{\alpha-1}

and, within a simple model assumption, the in-medium effective kaon-nucleon cross sections. The effective cross sections extracted from the electroproduction data are found to be smaller than the free cross sections determined from kaon-nucleon scattering experiments, and the parameter

\alpha

was found to be significantly larger than those obtained from kaon-nucleus scattering. We have included similar comparisons between pion- and proton-nucleon effective cross sections as determined from electron scattering experiments, and pion-nucleus and proton-nucleus scattering data.

24.85.+p
13.75.Jz
25.30.Rw

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