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arXiv 1709.01405hep-phhep-ex
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$ep$实验中带电介子产生的GPD

GPDs from charged current meson production in $ep$ experiments

Marat Siddikov, Ivan Schmidt

摘要:

我们建议在带电介子产生过程$ep\toν_{e}π^{-}p$中探测广义部分子分布。与π介子光生相反,该过程对非偏振的GPD $H,\,E$敏感,并且由于这个原因,具有由较高扭曲和Bethe-Heitler型贡献的非常小的污染。由于所有产生的强子都是带电的,我们希望这个过程的运动学可以很容易地重建。我们估计了升级的12 GeV杰斐逊实验室实验的运动学截面,并发现由于大光度的过程可以用合理的统计数据来测量。

英文摘要:

We suggest that generalized parton distributions can be probed in charged current meson production process, $ep\toν_{e}π^{-}p$. In contrast to pion photoproduction, this process is sensitive to the unpolarized GPDs $H,\,E$, and for this reason has a very small contamination by higher twist and Bethe-Heitler type contributions. Since all produced hadrons are charged, we expect that the kinematics of this process could be easily reconstructed. We estimated the cross-sections in the kinematics of upgraded 12 GeV Jefferson Laboratory experiments and found that thanks to large luminosity the process can be measured with reasonable statistics.

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