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Universality test of short range nucleon-nucleon correlations in nuclei with strange and charmed probes

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The understanding of the EMC effect and its relation to the short-range nucleon-nucleon correlations (SRC) in nuclei is a major challenge for modern nuclear physics. One of the key aspects… Click to show full abstract

The understanding of the EMC effect and its relation to the short-range nucleon-nucleon correlations (SRC) in nuclei is a major challenge for modern nuclear physics. One of the key aspects of the connection between these phenomena is the universality. The universality is a statement that the SRC is responsible for the EMC effect and the modification of the partonic structure of the SRC is the same in different nuclei. The flavor dependence of the universality is one of the unanswered questions. The performed up to now investigations have demonstrated the existence and the universality of the SRC for light \begin{document}$ u $\end{document} and \begin{document}$ d $\end{document} quarks. Recently, it was suggested that the universality for heavy flavors can be studied through their deep subthreshold production in \begin{document}$ \gamma A $\end{document} and eA collisions. We will discuss an alternative possibility to access the strange and gluon high-X structure of the SRC and to establish universality for heavy flavors using nuclear semi-inclusive deep inelastic scattering (nSIDIS), which probes different quark flavor combination depending of the final state hadron. The specific reaction can be "tagged" by observation of a strange or charmed particle registered in coincidence with scattering lepton. The universality of the SRC can be tested in the kinematic region \begin{document}$ X>1 $\end{document} , where the contribution to the cross section from SRC becomes dominant. Exploring the strangeness, charmonium, and open charm will shed light on the role of quarks and gluons in nuclei and thereby develop an understanding of how nuclei emerge within QCD.

Keywords: short range; document; universality; nucleon nucleon; range nucleon; nucleon

Journal Title: Chinese Physics C
Year Published: 2021

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