Bulletin of the American Physical Society
APS April Meeting 2011
Volume 56, Number 4
Saturday–Tuesday, April 30–May 3 2011; Anaheim, California
Session E2: New Insights into the Short-Range, High-Momentum Components of the Nuclear Wavefunction |
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Sponsoring Units: DNP Chair: Rolf Ent, Thomas Jefferson National Accelerator Facility Room: Grand BCD |
Saturday, April 30, 2011 3:30PM - 4:06PM |
E2.00001: New, High precision results on $x>1$ and the EMC Effect in Nuclei Invited Speaker: Inclusive electron scattering has proven to be an exceptional tool for studying short range structure in nuclei. Measurements of the EMC effect at $bjorken x < 1$ are aimed at studying in-medium modification of the nucleon structure functions. On the other hand, inclusive measurements at $bjorken x>1$ focus on short range correlations (SRCs) between nucleons. Recent data on the EMC effect from Jefferson Lab suggest a sensitivity to short range nuclear structure related to NN correlations at $x>1$. The high precision results on the EMC effect and the ratios at $x>1$ have a linear relationship, suggesting a common physics explanation. Results from both experiments will be presented and plans for future measurements will be discussed. [Preview Abstract] |
Saturday, April 30, 2011 4:06PM - 4:42PM |
E2.00002: The nuclear wavefunction at high momenta and connections to the EMC effect Invited Speaker: The EMC Effect, the fact that the per-nucleon deep-inelastic lepton scattering cross sections of nuclei are smaller than deuterium for $0.3 < x < 0.7$, is not well understood. The shape of the nucleon momentum distribution in nuclei for $p > 0.25$ GeV/c is the same for all nuclei. Two-nucleon Short Range Correlations (SRC) are responsible for these high momentum nucleons, which are also at higher local density. This talk will show that the magnitude of the EMC effect is directly proportional to the probability of SRC for nuclei from deuterium to gold. It will present our current knowledge of SRC, including their momentum and isospin distributions, and how this can help us understand the origins of the EMC effect. It will also use the observed EMC-SRC relationship to extract the ratio of the deuteron to the free $pn$ pair cross sections and $F_2^n/F_2^p$, the ratio of the free neutron to free proton structure functions. [Preview Abstract] |
Saturday, April 30, 2011 4:42PM - 5:18PM |
E2.00003: Short Range Correlations, High-Momentum Components of Nuclei, and the EMC Effect; New Theoretical Insights Invited Speaker: Recent progress in studies of short-range correlations sheds new light on the host of nuclear phenomena ranging from hadronic modifications, quark-hadron transitions to the equation of state of superdense nuclear matter. We will first discuss the theoretical approaches in probing nuclear structure at short distances and high local densities. Then the question on how the nuclear interactions at short distances are related to the modification of the properties of bound nucleons will be addressed. The theoretical description of the recent observation of the relation between probabilities of 2N short range correlations and EMC effects will be presented. In the last part of the talk we will discuss the implications of the recent progress in studies of isospin structure of short-range correlations on the properties of the equation of state of high density asymmetric nuclear matter. [Preview Abstract] |
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