Studying Short-Range Correlations with Real Photon Beams at GlueX
O. Hen, M. Patsyuk, E. Piasetzky, A. Schmidt, A. Somov, H. Szumila-Vance, L. B. Weinstein, D. Dutta, H. Gao, M. Amaryan, A. Ashkenazi, A. Beck, V. Berdnikov, T.… 展开作者
O. Hen, M. Patsyuk, E. Piasetzky, A. Schmidt, A. Somov, H. Szumila-Vance, L. B. Weinstein, D. Dutta, H. Gao, M. Amaryan, A. Ashkenazi, A. Beck, V. Berdnikov, T. Black, W. J. Briscoe, T. Britton, W. Brooks, R. Cruz-Torres, M. M. Dalton, A. Denniston, A. Deur, H. Egiyan, C. Fanelli, S. Fegan, S. Furletov, L. Gan, L. Guo, F. Hauenstein, H. Haykobyan, D. W. Higinbotham, D. G. Ireland, G. Johansson, M. Kamel, I. Korover, S. Kuleshov, D. Lawrence, K. Livingston, D. Mack, H. Marukyan, M. McCaughan, B. Mckinnon, S. Meytal-Beck, F. Nerline, D. Nguyen, A. Papadopoulou, P. Pauli, R. Pedroni, L. Pentchev, J. R. Pybus, S. Ratliff, D. Romanov, C. Romera, C. Salgado, B. Schmookler, E. P. Segarra, E. Seroka, P. Sharp, S. Somov, I. I. Strakovsky, S. Taylor, A. Thiel, B. Zihlmann
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38 pages, 26 figures, proposal for Jefferson Lab Experiment E12-19-003, submitted to Jefferson Lab PAC 47 (2019)
The past few years has seen tremendous progress in our understanding of short-range correlated (SRC) pairing of nucleons within nuclei, much of it coming from electron scattering experiments leading to the break-up of an SRC pair. The interpretation of these experiments rests on assumptions about the mechanism of the reaction. These assumptions can be directly tested by studying SRC pairs using alternate probes, such as real photons. We propose a 30-day experiment using the Hall D photon beam, nuclear targets, and the GlueX detector in its standard configuration to study short-range correlations with photon-induced reactions. Several different reaction channels are possible, and we project sensitivity in most channels to equal or exceed the 6 GeV-era SRC experiments from Halls A and B. The proposed experiment will therefore decisively test the phenomena of np dominance, the short-distance NN interaction, and reaction theory, while also providing new insight into bound nucleon structure and the onset of color transparency.
Exclusive Hard Processes for Studying Hadron Structures at J-PARC
在适当的硬标度下，排他强子过程可以提供强子内部夸克胶子组态的新信息。J-PARC强子大厅高动量束线中10-20 GeV次级介子束的可用性为进行独特的硬过程测量提供了一个独特的机会。我们通过两种可能性来解决这个有趣的方法：（a）$Λ(1405)$的组分夸克结构的PDMATHAMM，和（b）核子广义部分子分布（GPD）的专有π-诱导Drell-Yan过程$π^- p \to γ^* n \to l^+ l^- n$。在J-PARC上实现这样的测量，将为研究奇异强子的内部夸克结构以及基于微扰QCD坚实理论基础的核子GPD开辟一条新的途径。
