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arXiv 0912.2679nucl-th
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从氘核光生带电K介子的Regge加共振预言

Regge-plus-resonance predictions for charged-kaon photoproduction from the deuteron

Pieter Vancraeyveld, Lesley De Cruz, Jan Ryckebusch, Tim Van Cauteren

摘要:

我们提出了一个雷吉启发的有效拉格朗日框架从氘核的带电K介子光生。在非相对论平面波冲量近似下,利用Regge加共振基本算符研究了准自由K介子的产生。Regge加共振模型被发展用来描述质子光生和电生K介子的产生,并可以推广到中子奇异态的产生。对振幅的非共振贡献根据t通道中的K+(494)和K*+(892)Regge轨迹交换来建模。这个振幅是补充选择的s通道共振交换图。我们研究了半包容带电K介子产生截面理论不确定性的几个来源。当考虑准自由K介子在束缚中子上的产生时,光耦合螺旋度振幅的实验误差条对预测能力产生了严重的限制。

英文摘要:

We present a Regge-inspired effective-Lagrangian framework for charged-kaon photoproduction from the deuteron. Quasi-free kaon production is investigated using the Regge-plus-resonance elementary operator within the non-relativistic plane-wave impulse approximation. The Regge-plus-resonance model was developed to describe photoinduced and electroinduced kaon production off protons and can be extended to strangeness production off neutrons. The non-resonant contributions to the amplitude are modelled in terms of K+(494) and K*+(892) Regge-trajectory exchange in the t-channel. This amplitude is supplemented with a selection of s-channel resonance-exchange diagrams. We investigate several sources of theoretical uncertainties on the semi-inclusive charged-kaon production cross section. The experimental error bars on the photocoupling helicity amplitudes turn out to put severe limits on the predictive power when considering quasi-free kaon production on a bound neutron.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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