The $pd\to ^3H_ΛK^+$ reaction cross section

Details The $pd\to ^3H_ΛK^+$ reaction cross section The $pd\to ^3H_ΛK^+$ reaction cross section

1998-04-22

arxiv.org/abs/nucl-th/9804050v1

J.Phys. G21 (1995) L69-L74

Physics

Nuclear Physics

Nuclear Theory

10 pages, Latex, 3 Postscript figures

Scientific paper

10.1088/0954-3899/21/9/001

The one- and two-step mechanisms of the $pd\to ^3H_\Lambda K^+$ reaction in the range of incident proton kinetic energy 1.13-3.0 GeV have been investigated. A remarkable peculiarity of the two-step mechanism which incorporates subprocesses $pp\to d\pi ^+$ and $\pi^+n\to K^+\Lambda $ is the so called velocity matching providing the presence of all intermediate particles nearly to the on-mass-shell. The differential cross section has been calculated using a realistic model for the hypertritium $^3H_\Lambda $ wave function. The maximum value of the cross section is estimated as $\sim $1nb/sr. The contribution of the one-step mechanism with the elementary process $pN\to NK\Lambda $ into the cross section has been found to be two - three orders of magnitude smaller in comparison with the two-step mechanism.

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