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arXiv 1109.3549nucl-ex
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K-在静止时的超核产生

Hypernuclei Production by K- at rest

G. Bonomi

摘要:

超核的产生需要向核中注入奇异性。这可以通过不同的方式实现,主要是在固定目标上使用π +或K-波束。本文综述了K-在静止状态下产生超核的研究进展.当K-停止在核内时,它可以经历所谓的“奇异交换反应”,其中中子被发射出π介子的λ所取代。通过精确地研究出射的π介子,可以测量超核的结合能和形成几率。FINUDA实验对7 Li、9 Be、13 C和16 O的新测量,加上以前对12 C和16 O的测量,首次允许研究超核的形成与原子质量数A的函数关系。新的测量还提供了将捕获的K-原子波函数的影响与π光学核势的影响以及特定超核态的影响分开的可能性。本文介绍和讨论了K-在静止状态下超核产生的研究结果。

英文摘要:

The creation of a hypernucleus requires the injection of strangeness into the nucleus. This is possible in different ways, mainly using pi+ or K- beams on fixed targets. A review of hypernuclei production by K- at rest is here presented. When a K- stops inside a nucleus it can undergo the so called "strangeness-exchange reaction", in which a neutron is replaced by a Lambda with the emission of a pion. By precisely studying the outgoing pions both the binding energy and the formation probability of the hypernuclei can be measured. New measurements from the FINUDA experiment on 7Li, 9Be, 13C and 16O, coupled with previous measurements on 12C and 16O, allowed for the first time the study of the formation of hypernuclei as a function of the atomic mass number A. The new measurements also offered the possibility of disentangling the effects due to atomic wave-function of the captured K- from those due to the pion optical nuclear potential and from those due to the specific hypernuclear states. These new results on the study of the hypernuclei production by K- at rest are here presented and discussed.

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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