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arXiv 0812.4501hep-ph
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粲奇$ν$ DIS衍射中的高扭曲效应

Higher twist effects in charmed-strange $ν$DIS diffraction

R. Fiore, V. R. Zoller

摘要:

中微子深度非弹性散射中粲奇异流的不守恒性在小的Bjorken $ν$值下强烈影响着纵向结构函数$F_L$.对$F_L$的相应修正是在小- $x$处由快速增长的胶子密度因子增强的更高扭曲效应。结果表明,在$x\lsim 0.01$和$Q^2\sim m_c^2$中,由粲奇异电流诱导的$F_L$分量超过了光夸克分量,并主导了$F_L=F_L^{cs}+F_L^{ud}$。彩色偶极子分析阐明了现象背后的物理学原理,并提供了对效果的定量估计。

英文摘要:

The non-conservation of charmed-strange current in the neutrino deep inelastic scattering ($ν$DIS) strongly affects the longitudinal structure function, $F_L$, at small values of Bjorken $x$. The corresponding correction to $F_L$ is a higher twist effect enhanced at small-$x$ by the rapidly growing gluon density factor. As a result, the component of $F_L$ induced by the charmed-strange current prevails over the light-quark component and dominates $F_L=F_L^{cs}+F_L^{ud}$ at $x\lsim 0.01$ and $Q^2\sim m_c^2$. The color dipole analysis clarifies the physics behind the phenomenon and provides a quantitative estimate of the effect.

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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