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40Ca transverse response function from coupled-cluster theory
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DOI：10.1103/PhysRevC.109.025502.png)
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We present calculations of the 40Ca transverse response function obtained from coupled-cluster theory used in conjunction with the Lorentz integral transform method. We employ nuclear forces derived at next-to-next-to leading order in chiral effective field theory with and without A degrees of freedom. We first benchmark this approach on the 4He nucleus and compare both the transverse sum rule and the response function to earlier calculations based on different methods. As expected from the power counting of the chiral expansion of electromagnetic currents and from previous studies, our results retaining only one-body term underestimate the experimental data for 4He by about 20%. However, when the method is applied to 40Ca at the same order of the expansion, response functions do not lack strength and agree well with the world electron scattering data. We discuss various sources of theoretical uncertainties and comment on the comparison of our results with the available experiments.
Keyword:
INCLUSIVE ELECTRON-SCATTERING
SUM-RULE
期刊
IF:
3.4
论文数:
2.9W
被引数:
5.7W
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