[Theory-seminars] Theory seminar next week

[Astrid Hiller Blin]

Dear all,

Please find the information about next week's theory seminar below. Note
also that *we have now started recording the seminars*, so that those who
would like to attend, but cannot due to conflicting meetings/time zones,
are at least able to watch the seminars later on. You can find the
recordings in the archives:
https://www.jlab.org/theory/seminars/2021seminars

*Theory seminar*
Monday, March 1st, 1:00 PM

*Diego Lonardoni* (Michigan State University) will talk about "Many-body
factorization and position–momentum equivalence of nuclear short-range
correlations".

*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.


Bluejeans connection: https://bluejeans.com/801786278
<https://urldefense.proofpoint.com/v2/url?u=https-3A__bluejeans.com_801786278&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=AIMSQQ81YDyrZuJNGks2qw&m=aT_3J5jjiFmHtFXffqbfPqEY_A73NEWw2ebyFyL_eCA&s=YNm3qgT5e8sJgKfZ9vFA_w--imuXwmeAjg0C4AslLwg&e=>

We look forward to seeing you there!
Astrid, Christos, Filippo

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Astrid Hiller Blin (PhD)
Postdoctoral fellow
Thomas Jefferson National
Accelerator Facility (Jefferson Lab)
12000 Jefferson Ave
Newport News, VA 23606, USA
Phone: +1 (757) 291 6890
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