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SUMMARY:Halo nuclei as open quantum systems.
DTSTART;VALUE=DATE-TIME:20251119T164500Z
DTEND;VALUE=DATE-TIME:20251119T170000Z
DTSTAMP;VALUE=DATE-TIME:20260423T062039Z
UID:indico-contribution-29002@indico.ific.uv.es
DESCRIPTION:Speakers: Daniel Movilla Quintero (Institute of Structure of M
 atter (IEM-CSIC))\nThe unique structure of the halo nucleus $^{11}$Be cont
 inues to challenge    the traditional understanding of nuclear stability a
 nd weak    interaction dynamics. In this nuclei\, the characteristics of a
     weakly-bound single-particle orbital wave function\, defined by its   
  closeness to the confinement threshold\, are central to many nuclear    p
 henomena. The weak binding of the halo neutron in $^{11}$Be\, positioned  
   near the proton emission threshold\, creates a quantum environment    wh
 ere the halo neutron’s wave function extends into the continuum.    This
  open quantum system behavior allows for an enhanced decay    channel via 
 a narrow resonant state closer to the daughter nuclei $^{11}$B    proton s
 eparation energy\, which significantly increases the proton emission    br
 anching ratio. Resulting in a considerable branching ratio of    proton em
 ission in a neutron rich nuclei\, which is in actual    experimental discr
 epancy with theoretical models. \n\nThis coupling to    continuum states m
 anifests as a Fano resonance phenomenon\, where the    interference betwee
 n the discrete resonant state and the background    continuum produces asy
 mmetric line shapes in nuclear spectroscopy. Moreover\, weak binding behav
 ior significantly affects our insights    into the evolution of single-par
 ticle orbitals\, the positioning and    significance of the light particle
  drip lines\, and the emergence of    nuclear halo states. This fact\, ope
 ns the possibility of more exotic    decay modes\, such as the hypothesize
 d dark decay\, such process would    evade direct detection\, representing
  an intriguing interface between    nuclear structure physics and particle
  physics beyond the standard    model\n\nhttps://indico.ific.uv.es/event/8
 035/contributions/29002/
LOCATION:
URL:https://indico.ific.uv.es/event/8035/contributions/29002/
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