Abstract
Short Range Correlations (SRC) are brief fluctuations of high relative momentum nucleon pairs. Properties of SRC have important consequences for nuclear physics, high energy physics, atomic physics, and astrophysics. SRC pairs form some of the densest states of cold matter achievable on Earth, making them an ideal system to study the partonic and nucleonic degrees of freedom in nuclear systems. Hard exclusive breakup reactions, where high-energy probes scatter on SRC pairs, are used to study such properties of SRC pairs as isospin decomposition, nuclear mass and asymmetry dependence, c.m. momentum distribution. Thomas Jefferson National Accelerator Facility (JLab) plays a key role in the SRC program. CLAS (CEBAF Large Acceptance Spectrometer), located in Hall B at JLab, has almost 4πcoverage and is capable of measuring exclusive reactions of the type A(e, e’pp). We will discuss the recent experimental results from JLab and future experiments planned at JLab as well as at JINR.
Highlights
Basics of short range correlationsShort Range Correlations are brief fluctuations of two nucleons with high and opposite momenta, where each of them is higher than the Fermi momentum for the given nucleus, and the center of mass momentum is lower than the Fermi momentum
Short Range Correlations (SRC) are brief fluctuations of high relative momentum nucleon pairs
The study of SRCs using exclusive reactions has a long history, but here we focus only on exclusive measurements performed with high energy probes and large momentum transfer
Summary
Short Range Correlations are brief fluctuations of two nucleons with high and opposite momenta, where each of them is higher than the Fermi momentum for the given nucleus, and the center of mass momentum is lower than the Fermi momentum. The fraction of high momentum nucleon in nuclei is about 20-25%. It was shown experimentally, that almost all high momentum nucleons belong to SRC pairs. The presence of SRC pairs within any nucleus and their properties are important for understanding the nucleon-nucleon interaction and the interplay between partonic and nucleonic degrees of freedom in nuclear systems
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