Coherent meson production in antinucleon annihilation on nuclei

Coherent meson production in antinucleon annihilation on nuclei
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原子核上反核子湮灭中的相干介子产生

DOI:
10.1007/s10751-014-1050-7
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发表时间:
2014
影响因子:
--
通讯作者:
S. Wycech
S. Wycech
中科院分区:
--
文献类型:
--
作者:
S. Lourenco;H. Lenske;S. Wycech

文献摘要

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在 eikonal 模型中呈现了 1 至 15 GeV 能量范围内反核子-核子 (N̅N) 相互作用的唯象光学势。除了讨论强度和能量依赖性之外,势还用于描述原子核上相干介子产生的初始状态相互作用。为了描述核物质效应,使用 Hartree-Fock Bogoliobuv (HFB) 密度。第一步,我们计算两个介子(即π介子)的产生。为了覆盖较大的能量范围,通过向 Kisslinger 型 ansatz 添加超出 Δ 共振的共振来改善最终态 πA 相互作用。给出了 N̅N 和 π 跨部分的结果。
A phenomenological optical potential for antinucleon-nucleon (N̅N) interaction in an energy range of 1 to 15 GeV is presented in an eikonal model. In addition to the discussion of the strength and energy dependence, the potential is used to describe initial state interactions for coherent meson production on nuclei. To describe nuclear matter effects, Hartree-Fock Bogoliobuv (HFB) densities are used. As a first step we calculate the production of two mesons, namely pions. To cover the large energy range, the final state pion-nucleus (πA) interaction is improved by adding resonances beyond the Δ resonance to a Kisslinger-type ansatz. Results forN̅NandπAcross sections are presented.