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arXiv 0810.4841hep-ph
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核介质中带电π介子轻生多重数比的标度行为

Possible scaling behaviour of the multiplicities ratio in leptoproduction of charged pions in nuclear medium

N. Akopov, L. Grigoryan, Z. Akopov

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摘要：

本文根据最近在DESY的HERMES实验中获得的不同核的半包容深度非弹性散射（SIDIS）的二维分布数据，其中包含了在$z$切片中产生的带电π介子作为$ν$的函数的数据，以及在$ν$切片中产生的带电π介子作为$z$的函数的数据，证明了在二维分布数据的基础上，有可能以单变量$τ$的函数形式参数化原子核和氘的多重数比（每核子）$R_M^{h}$，它具有强子形成时间的物理意义。我们将这种效应称为$τ$缩放。$τ$是两个变量$ν$和$z$的函数。还证明了$R_M^{h}$可以以$τ$，$a_{11}$ + $τa_{12}$的线性多项式的形式表示，其中参数$a_{11}$和$a_{12}$不依赖于$ν$和$z$ .

英文摘要：

In this paper it is demonstrated that based on two-dimensional distributions in semi-inclusive deep inelastic scattering (SIDIS) data, obtained recently by the HERMES experiment at DESY on different nuclei, which contains data for charged pions produced in $z$ slices as a function of $ν$, and in a $ν$ slices as a function of $z$, it it is possible to parametrise a ratio of multiplicities on nucleus and deuterium (per nucleon) $R_M^{h}$ in a form of a function of a single variable $τ$, which has the physical meaning of the formation time of hadron. We call this effect $τ$ scaling. $τ$ is a function of two variables $ν$ and $z$. It is also shown that $R_M^{h}$ can be presented in a form of a linear polynomial of $τ$, $a_{11}$ + $τa_{12}$, where parameters $a_{11}$ and $a_{12}$ do not depend on $ν$ and $z$.

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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