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<div class="">Dear all,</div>
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<div class="">Tomorrow we will have a theory seminar, please see below for details:</div>
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<div class="">Bluejeans connection: <a href="https://bluejeans.com/801786278" class="">https://bluejeans.com/801786278</a></div>
<div class="">Date and time: Monday Mar. 1st, 2021, 1:00PM</div>
<div class="">Speaker: <b class="">Diego Lonardoni</b> (Michigan State University)</div>
<div class="">Title: <span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: AvenirNext-Regular;" class="">Many-body factorization and position–momentum equivalence of nuclear short-range correlations</span></div>
<div class="">Abstract: While mean-field approximations, such as the nuclear shell model, provide a good description of many bulk nuclear properties, they fail to capture the important effects of nucleon–nucleon correlations such as the short-distance and high-momentum
components of the nuclear many-body wave function. Here, we study these components using the effective pair-based generalized contact formalism and ab initio quantum Monte Carlo calculations of nuclei from deuteron to 40Ca. We observe a universal factorization
of the many-body nuclear wave function at short distance into a strongly interacting pair and a weakly interacting residual system. The residual system distribution is consistent with that of an uncorrelated system, showing that short-distance correlation
effects are predominantly embedded in two-body correlations. Spin- and isospin-dependent ‘nuclear contact terms’ are extracted in both coordinate and momentum space for different realistic nuclear potentials. The contact coefficient ratio between two different
nuclei shows very little dependence on the nuclear interaction model. These findings thus allow extending the application of mean-field approximations to short-range correlated pair formation by showing that the relative abundance of short-range pairs in the
nucleus is a long-range (that is, mean field) quantity that is insensitive to the short-distance nature of the nuclear force.</div>
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Kindly note that <b class="">we have now started recording the seminars.</b> The recording archives can be found here:</div>
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<a href="https://www.jlab.org/theory/seminars/2021seminars" class="">https://www.jlab.org/theory/seminars/2021seminars</a></div>
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<div class="">See you all there!</div>
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<div class="">Best regards,</div>
<div class="">Astrid, Christos, Filippo</div>
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