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arXiv 0812.0098nucl-th
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K介子对产生中的耦合通道效应

Coupled-channel effects in kaon pair production

Colin Wilkin

摘要:

本文讨论了质子-质子碰撞中与K介子对产生有关的两种耦合通道效应。(1)虽然有充分的证据表明反K介子在pp -> K+pK-p中被反冲质子强烈吸引,但K+K-相互作用的残余效应也被观察到,包括在K 0 \bar{K} 0阈值处可能出现的尖点。这是通过简单的K矩阵方法来研究的。(2)利用耦合的K-p/pi 0 Sigma 0通道的可分离势描述,将pp -> K+p{K-p}和pp -> K+p{pi 0 Sigma 0}的产生速率和不变质量分布联系起来。可以合理地认为,这对反应是通过产生λ(1405)驱动的。

英文摘要:

Two coupled channel effects connected with kaon pair production in proton-proton collisions are discussed. (1) Although there is ample evidence that the antikaon is strongly attracted to the recoil protons in pp -> K+pK-p, residual effects of the K+K- interaction are seen, including a possible cusp at the K0\bar{K}0 threshold. This is investigated within a simple K-matrix approach. (2) The production rates and invariant mass distributions for pp -> K+p{K-p} and pp -> K+p{pi0 Sigma0} are related using a separable potential description of the coupled K-p/pi0 Sigma0 channels. It can be plausibly argued that this pair of reactions is driven through the production of the Lambda(1405).

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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