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SUMMARY:From ab initio structure predictions to reaction calculations via
effective field theory
DTSTART;VALUE=DATE-TIME:20180605T055400Z
DTEND;VALUE=DATE-TIME:20180605T061200Z
DTSTAMP;VALUE=DATE-TIME:20190921T152040Z
UID:indico-contribution-11024@indico2.riken.jp
DESCRIPTION:Speakers: Pierre Capel (Johannes Gutenberg Universität Mainz)
\nHalo nuclei exhibit an uncommon nuclear structure with a larger matter r
adius compared to stable nuclei [1]. This large size is qualitatively unde
rstood as due to the loose binding of one or two valence neutrons\, which
have then a high probability of presence at a large distance from the othe
r nucleons. They thus form a sort of halo around the compact core of the n
ucleus. The best known examples are 11Be\, with a one-neutron halo\, and 1
1Li\, with a two-neutron halo. Due to their short lifetime\, these nuclei
are mostly studied through reactions like breakup [2]. In order to extract
valuable structure information from measured cross sections\, a precise m
odel of the reaction coupled to a reliable description of the projectile i
s needed. Many such models have been developed (see Ref. [3] for a recent
review). However\, they mostly rely on a simple two- or three-body descrip
tion of the nucleus. Recently\, some of these exotic nuclei have become ac
cessible to ab initio calculations [4]. Unfortunately\, such A-body descri
ptions are too computationally demanding to be directly included within ex
isting reaction models. In the present work\, we use the outputs of an ab
initio calculations of 11Be as inputs to the description\nof that nucleus
within a reliable breakup model [5]. That description is inspired by an ef
fective field theory treatment of 11Be [6] (see Ref. [7] for a recent revi
ew). Our calculations of the breakup of 11Be on Pb and C at about 70AMeV a
re in very good agreement with experimental measurements [2]. These excell
ent results prove the feasibility of incorporating results from ab initio
calculations in reaction theory in this way. More importantly\, they confi
rm the results for important aspects of 11Be obtained by the calculations
of Calci et al. [4]\, hence improving our understanding of the nuclear str
ucture far from stability.\n\nReferences\n[1] I. Tanihata J. Phys. G 22 15
7 (1996)\n[2] N. Fukuda et al. Phys. Rev. C 70 054606 (2004)\n[3] D. Baye
and P. Capel Clusters in Nuclei\, Vol. 2 vol 848 ed Beck C (2012\, Springe
r\, Heidelberg)\n[4] A. Calci\, P. Navratil\, R. Roth\, J. Dohet-Eraly\, S
. Quaglioni and G. Hupin Phys. Rev. Lett. 117 242501 (2016)\n[5] D. Baye\,
P. Capel and G. Goldstein Phys. Rev. Lett. 95 082502 (2005)\n[6] C. Bertu
lani\, H.-W. Hammer and U. van Kolck Nucl. Phys. A 712 37-58 (2002)\n[7] H
.-W. Hammer\, C. Ji and D. R. Phillips J. Phys. G 44 103002 (2017)\n\nhttp
s://indico2.riken.jp/event/2536/contributions/11024/
LOCATION:Matsue Kunibiki Messe
URL:https://indico2.riken.jp/event/2536/contributions/11024/
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