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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Investigation of K+-meson production in pA collisions with ANKE
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Investigation of K+-meson production in pA collisions with ANKE

机译：与ANKE在pA碰撞中产生K +介子的研究

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In a series of measurements with the ANKE spectrometer at COSY-Julich, the production of K+-mesons in pA (A = C, Cu, Ag and Au) collisions in a wide range of beam energies, T-p = 1.0...2.3 GeV, has been investigated. Double differential cross sections d(2)sigma/dOmegadp have been evaluated. The strong suppression in the ratios of K+ production on copper, silver and gold targets to that on carbon observed for p(K) < 200-250 MeV/c may be ascribed to a combination of Coulomb and nuclear repulsion in the K(+)A system. Our data are consistent with a K+ A nuclear potential of V-K(0) approximate to 20 MeV at low kaon momenta and normal nuclear density. First momentum spectra of protons and deuterons measured in coincidence with the K+-mesons have been obtained at T-p = 1.2 GeV. These data supply direct evidence for the two-step reaction mechanism, with formation of intermediate pions, leading to kaon production. [References: 20]
机译：在COSY-Julich的ANKE光谱仪进行的一系列测量中，pA（A = C，Cu，Ag和Au）中的K +介子在宽范围的光束能量中发生碰撞，Tp = 1.0 ... 2.3 GeV ，已被调查。已评估了双微分截面d（2）sigma / dOmegadp。对于p（K）<200-250 MeV / c观察到的铜，银和金靶上的K +产生比率与碳上的K +产生比率的强烈抑制可能归因于K（+）中的库仑和核排斥相结合。一个系统。我们的数据与低钾离子矩和正常核密度下V-K（0）的K + A核势相近，约为20 MeV。在T-p = 1.2 GeV下获得了与K +介子一致的质子和氘核的第一动量谱。这些数据提供了两步反应机理的直接证据，其中包括中间介子的形成，从而导致了钾的产生。 [参考：20]

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