Near-threshold K*(892)+ meson production in the interaction of π- mesons with nuclei

被引:0
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作者
E.Ya.Paryev
机构
[1] Institute for Nuclear Research, Russian Academy of Sciences
[2] Institute for Theoretical and Experimental Physics
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中图分类号
O572.33 [介子];
学科分类号
070202 ;
摘要
We study the inclusive production of strange vector K(892)+mesons in πA reactions at near-threshold laboratory incident pion momenta of 1.4-2.0 GeV/c via a nuclear spectral function approach.The approach accounts for incoherent primary πmeson-proton πp→K(892)Eproduction processes as well as the influence of the scalar K(892)-nucleus potential(or the K(892)in-medium mass shift) on these processes.We calculate the absolute differential and total cross sections for the production of K(892)mesons from carbon and tungsten nuclei at laboratory angles of 0°-45° and at the aforementioned momenta in five scenarios for the aforenoted shift.We show that the K(892)momentum distributions and their excitation functions(absolute and relative) possess a high sensitivity to changes in the in-medium K(892)mass shift in the low-momentum region of 0.1-0.6 GeV/c.Therefore,the measurement of such observables in a dedicated experiment at the GSI pion beam facility in the near-threshold momentum domain will allow us to get valuable information on the K(892)in-medium properties.
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页码:172 / 182
页数:11
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