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J. Seely, et al., PRL103, 202301 (2009) N. Fomin, et al., PRL 108, 092052 (2012 )

JLab6: Cluster structure connects to high-momentum components and internal quark modification of nuclei. Short-Range Correlations (SRCs) dominated by np pairs interacting via tensor force EMC effect: 10 % suppression of high-x quarks in all nucleons or 50 % effect in the 20% in SRCs?

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J. Seely, et al., PRL103, 202301 (2009) N. Fomin, et al., PRL 108, 092052 (2012 )

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  1. JLab6: Cluster structure connects to high-momentum components and internal quark modification of nuclei Short-Range Correlations (SRCs) dominated by np pairs interacting via tensor force EMC effect: 10% suppression of high-x quarks in all nucleons or 50% effect in the 20% in SRCs? Relevant for high-density nuclear matter J. Seely, et al., PRL103, 202301 (2009) N. Fomin, et al., PRL 108, 092052 (2012) J. Arrington, et al., PRC 86, 065204 (2012) L. Weinstein, et al., PRL 106, 052301 (2011) O. Hen, et al, PRC 85, 047301 (2012) John Arrington (johna@anl.gov)

  2. JLab6,12: Mass, Isospin-dependence of SRCs • Future measurements: • Better quantify n-p dominance • Light nuclei (cluster structure) • Separate mass, isospin dependence Impact of np-dominated SRCs (based on present data) Effect of np-SRC on the kinetic part of the symmetry energy 0% np-SRC 3H 3He Esymkin [MeV] 15% No Correlations 20% 2 1H 2H 3He 4He 40Ca 48Ca Cu Au 6,7Li 9Be 10,11B 12C kF (fm-1) MSU Sn+Sn data n/p double ratio from Sn-Sn collisions Preliminary John Arrington (johna@anl.gov)

  3. JLab12: Probing Internal Quark Structure of SRCs 2) e-p elastic from high-momentum proton 1) DIS from high-momentum nucleon qD(x) two-nucleon only two-nucleon only 5% 6 quark bag 5% 6 quark bag ? Proton light-cone momentum 100+% effect in SRC-dominated region 3) Quark distributions of deuteron at x>1 ~1% “EMC effect” 4) “Spin” EMC effect in polarized 7Li– Test modern microscopic models of EMC effect John Arrington (johna@anl.gov)

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