Searching for three-nucleon short-range correlations

Sargsian, Misak; Day, D.; Frankfurt, L.; Strikman, M.

doi:10.1103/physrevc.100.044320

Cited by 14 publications

(9 citation statements)

References 48 publications

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“…Ref. (35) also predicts that a3(A), the A/ 3 He ratio in the 3N-SRC region, should go like a 2 2 (neglecting isospin differences), and they find that the E02-019 data are consistent with this prediction. Thus, there are hints that α = 1.6 might be sufficient to study 3N-SRCs, but new data at higher Q 2 will be needed to confirm the presence of 3N-SRCs (84,101).…”

Section: Impact On Other Physicsmentioning

confidence: 87%

“…While the transition from mean field to 2N-SRC dominance is clear, due to the rapid and well understood falloff of the mean field momentum distribution, the transition to 3N-SRCs depends strongly on both the 2N-SRC and 3N-SRC structure assumed in the calculations. Based on this calculation it was argued that 3N-SRCs might be visible somewhere above α = 1.6 (35), corresponding to x = 2.3 for the E02-019 data (15), with all other data sets stopping before α = 1.6. While the ratio is consistent with a plateau for x > 2.3, the statistics are limited and data exist for only one Q 2 , meaning that this data set is not sufficient to identify universal 3body behavior in 3 He and 4 He.…”

Section: Impact On Other Physicsmentioning

confidence: 99%

“…Another possibility is that at larger x there may begin to be contributions 3N-SRCs, in the region where the 2N-SRC contributions are dropping off. The 3N-SRC contribution, relative to 2N-SRCs, is expected to grow with the size of the nucleus (35), leading to increasingly imperfect scaling ratios.…”

Section: Nuclear Dependence Of Srcsmentioning

confidence: 99%

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Progress in understanding short-range structure in nuclei: an experimental perspective

Arrington,

Fomin,

Schmidt

2022

Preprint

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High-energy electron scattering is a clean and precise probe for measurements of hadronic and nuclear structure, with a key role in understanding the role of high-momentum nucleons (and quarks) in nuclei. Jefferson Lab has dramatically expanded our understanding of the high-momentum nucleons generated by short-range correlations, providing sufficient insight to model much of their impact on nuclear structure in neutron stars, and in low-to medium-energy scattering observables including neutrino oscillation measurements. These short-range correlations also appear to be related to the modification of the quark distributions in nuclei, and efforts to improve our understanding of the internal structure of these short-distance and high-momentum configurations in nuclei will provide important input on a wide range of high-energy observables.

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Section: Impact On Other Physicsmentioning

confidence: 87%

Section: Impact On Other Physicsmentioning

confidence: 99%

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Progress in understanding short-range structure in nuclei: an experimental perspective

Arrington,

Fomin,

Schmidt

2022

Preprint

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“…This sensitivity indicates that different effects, such as Adependent FSIs [45], or contributions from 3N-SRCs that are missing in the current GCF calculations and are estimated to be a ≈10% correction to the leading 2N-SRC contribution [8,10,37,68], might explain the disagreement seen in Fig. 2.…”

Section: (Bottom)] the If Calculation Is Very Sensitive To Both Param...mentioning

confidence: 86%

Extracting the number of short-range correlated nucleon pairs from inclusive electron scattering data

et al. 2021

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The extraction of the relative abundances of short-range correlated (SRC) nucleon pairs from inclusive electron scattering is studied using the generalized contact formalism (GCF) with several nuclear interaction models. GCF calculations can reproduce the observed scaling of the cross-section ratios for nuclei relative to deuterium at high x B and large Q 2 , a 2 = (σ A /A)/(σ d /2). In the nonrelativistic instant-form formulation, the calculation is very sensitive to the model parameters and only reproduces the data using parameters that are inconsistent with ab initio many-body calculations. Using a light-cone GCF formulation significantly decreases this sensitivity and improves the agreement with ab initio calculations. The ratio of similar mass isotopes, such as 40 Ca and 48 Ca, should be sensitive to the nuclear asymmetry dependence of SRCs, but is found to also be sensitive to low-energy nuclear structure. Thus the empirical association of SRC pair abundances with the measured a 2 values is only accurate to about 20%. Improving this will require cross-section calculations that reproduce the data while properly accounting for both nuclear structure and relativistic effects.

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“…Physically one can not extend the cutoff φ 0 to infinity in conventional 3D situation. This is because above certain momentum the k −4 form of the HMT in the single-nucleon momentum distribution is no longer reasonable again due to the higher-order correlations such as the three-nucleon interactions [152,186,187,188,189,190]. In this case, other HMT forms in n 0 k should be necessarily considered.…”

Section: Kinetic Eos Of Snm and The ǫ-Expansionmentioning

confidence: 99%

Equation of State of Neutron-Rich Matter in $d$-Dimensions

Cai¹,

Li²

2022

Preprint

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Nuclear systems under constraints, with high degrees of symmetries and/or collectivities may be considered as moving effectively in spaces with reduced spatial dimensions. We first derive analytical expressions for the nucleon specific energy E 0 (ρ), pressure P 0 (ρ), incompressibility coefficient K 0 (ρ) and skewness coefficient J 0 (ρ) of symmetric nucleonic matter (SNM), the quadratic symmetry energy E sym (ρ), its slope parameter L(ρ) and curvature coefficient K sym (ρ) as well as the fourth-order symmetry energy E sym,4 (ρ) of neutron-rich matter in general d spatial dimensions (abbreviated as "dD") in terms of the isoscalar and isovector parts of the isospin-dependent single-nucleon potential according to the generalized Hugenholtz-Van Hove (HVH) theorem. The equation of state (EOS) of nuclear matter in dD can be linked to that in the conventional 3-dimensional (3D) space by the ǫ-expansion which is a perturbative approch successfully used previously in treating second-order phase transitions and related critical phenomena in solid state physics and more recently in studying the EOS of cold atoms. The ǫ-expansion of nuclear EOS in dD based on a reference dimension d f = d − ǫ is shown to be effective with −1 ǫ 1 starting from 1 d f 3 in comparison with the exact expressions derived using the HVH theorem. Moreover, the EOS of SNM (with/without considering its potential part) is found to be reduced (enhanced) in lower (higher) dimensions, indicating in particular that the many-nucleon system tends to be deeper bounded but saturate at higher densities in spaces with lower dimensions. The symmetry energy perturbed from its counterpart in 3D is found to strongly depend on the momentum-dependence of the nucleon isovector potential. Moreover, the specific structure of the fourth-order symmetry energy in dD is also analyzed generally, and it is found to be naturally small, confirming the parabolic approximation for the EOS of neutron-rich matter from an even wider viewpoint. The links between the EOSs in 3D and dD spaces from the ǫ-expansion provide new perspectives to the EOS of neutron-rich matter. Further studies and potential applications of these links in nuclear physics and/or astrophysics are discussed.

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Searching for three-nucleon short-range correlations

Cited by 14 publications

References 48 publications

Progress in understanding short-range structure in nuclei: an experimental perspective

Progress in understanding short-range structure in nuclei: an experimental perspective

Extracting the number of short-range correlated nucleon pairs from inclusive electron scattering data

Equation of State of Neutron-Rich Matter in $d$-Dimensions

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