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arXiv 0904.4442hep-phnucl-th
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HERMES深度独家电产$π^+$

Deep exclusive electroproduction of $π^+$ at HERMES

Murat M. Kaskulov, Ulrich Mosel

摘要:

采用包含软强子和硬部分子反应机制的双组分模型,研究了排他反应$p(e,e'π^+)n$中π介子的深虚电生。结果进行了比较,在HERMES在深非弹性区域测量的$Q^2>1$ GeV $^2$和$W^2 > 10$ GeV $^2$值的实验数据。在前向角处,$π^+$横截面是纵向的,并且由Regge极交换控制,其中$π$是主导轨迹。具有$-t>1$ GeV $^2$的偏正区是横向的,并且显示部分子过程的优势。目前的结果为未来的JLAB设施的影响进行了简要讨论。

英文摘要:

Deeply virtual electroproduction of pion in exclusive reaction $p(e,e'π^+)n$ is studied using a two-component model which includes soft hadronic and hard partonic reaction mechanisms. The results are compared with the experimental data measured at HERMES in the deep inelastic region for values of $Q^2>1$ GeV$^2$ and $W^2 > 10$ GeV$^2$. At forward angles the $π^+$ cross section is longitudinal and is dominated by exchange of Regge poles, with $π$ the dominant trajectory. The off-forward region with $-t>1$ GeV$^2$ is transverse and shows the dominance of partonic subprocesses. An implication of present results for the future JLAB facilities are briefly 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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