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arXiv 0807.5000nucl-th
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奇异夸克对准弹性区中微子(反中微子)散射贡献的信号

Signals for strange quark contributions to the neutrino (antineutrino) scattering in quasi-elastic region

Myung-Ki Cheoun, K. S. Kim

摘要:

在相对论单粒子模型的框架下,研究了入射能量为500 MeV的准弹性区12 C靶的弹性中微子-核子散射和中微子-核散射中奇异夸克对中微子(反中微子)散射的贡献。对于中微子-核散射,用相对论光学势来考虑被敲出核子的末态相互作用的影响。在截面中,我们发现在被击倒的质子和中子之间的奇异夸克贡献的一些抵消。因此,入射中微子和反中微子之间的不对称性,即中性电流与带电电流之比,以及不对称性之间的差异被证明能够产生更可行的奇异效应的量。为了明确地显示取消的重要性,另外呈现排斥反应16 O(ν,ν' p)的结果以用于检测奇异效应。

英文摘要:

Strange quark contributions to the neutrino (antineutrino) scattering are investigated on the elastic neutrino-nucleon scattering and the neutrino-nucleus scattering for 12C target in the quasi-elastic region on the incident energy of 500 MeV, within the framework of a relativistic single particle model. For the neutrino-nucleus scattering, the effects of final state interaction for the knocked-out nucleon are included by a relativistic optical potential. In the cross sections we found some cancellations of the strange quark contributions between the knocked-out protons and neutrons. Consequently, the asymmetries between the incident neutrino and antineutrino which is the ratio of neutral current to charged current, and the difference between the asymmetries are shown to be able to yield more feasible quantities for the strangeness effects. In order to explicitly display importance of the cancellations, results of the exclusive reaction 16O(ν, ν' p) are additionally presented for detecting the strangeness effects.

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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