Momentum sharing in imbalanced Fermi systems

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Science  31 Oct 2014:
Vol. 346, Issue 6209, pp. 614-617
DOI: 10.1126/science.1256785

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  1. Fig. 1 Schematic representation of the momentum distribution, n(k), of two-component imbalanced Fermi systems.

    Red and blue dashed lines show the noninteracting system, whereas the solid lines show the effect of including a short-range interaction between different fermions. Such interactions create a high-momentum tail (k > kF, where kF is the Fermi momentum of the system). This is analogous to a dance party with a majority of girls, where boy-girl interactions will make the average boy dance more than the average girl.

  2. Fig. 2 Illustration of the CLAS detector with a reconstructed two-proton knockout event.

    For clarity, not all CLAS detectors and sectors are shown. The inset shows the reaction in which an incident electron scatters from a proton-proton pair via the exchange of a virtual photon. The human figure is shown for scale.

  3. Fig. 3 The extracted fractions of np (top) and pp (bottom) SRC pairs from the sum of pp and np pairs in nuclei.

    The green and yellow bands reflect 68 and 95% confidence levels (CLs), respectively (9). np-SRC pairs dominate over pp-SRC pairs in all measured nuclei.