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arXiv 1003.3066hep-phhep-th
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规范弦对偶中“中子”的极化深度非弹性散射

Polarized Deep Inelastic Scattering Off the "Neutron" From Gauge/String Duality

Jian-Hua Gao, Zong-Gang Mou

摘要:

我们研究深度非弹性散射极化“中子”使用规范/弦对偶。“中子”对应于中性中微子的超重力模式。通过在$\textrm{AdS}_{5}$空间的作用量中引入Pauli相互作用项,计算了大t' Hooft耦合$λ$和有限$x$与$λ^{-1/2}\ll x<1$的超引力近似下“中子”的极化深部非弹性结构函数.通过与Gao和Xiao在以前的工作中得到的荷电双中微子“质子”的比较,我们发现“中子”的结构函数与“质子”的结构函数在同一量级上受到功率抑制。特别是,我们发现,Burkhartt-Cottingham-like求和规则,这是满足高和肖的工作,被打破,由于泡利相互作用项。我们还说明了如何这样的泡利相互作用项可以自然地从高维费米子引力子耦合通过通常的卡鲁扎-克莱因减少。

英文摘要:

We investigate deep inelastic scattering off the polarized "neutron" using gauge/string duality. The "neutron" corresponds to a supergravity mode of the neutral dilatino. Through introducing the Pauli interaction term into the action in $\textrm{AdS}_{5}$ space, we calculate the polarized deep inelastic structure functions of the "neutron" in supergravity approximation at large t' Hooft coupling $λ$ and finite $x$ with $λ^{-1/2}\ll x<1$. In comparison with the charged dilatino "proton," which has been obtained in the previous work by Gao and Xiao, we find the structure functions of the "neutron" are power suppressed at the same order as the ones of the "proton." Especially, we find the Burkhardt-Cottingham-like sum rule, which is satisfied in the work by Gao and Xiao, is broken due to the Pauli interaction term. We also illustrate how such a Pauli interaction term can arise naturally from higher dimensional fermion-graviton coupling through the usual Kaluza-Klein reduction.

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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