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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1495
DTSTART:20090423T183000Z
DTEND:20090423T192500Z
DTSTAMP:20260420T095540Z
LAST-MODIFIED:20090330T205845Z
LOCATION:4274 Chamberlin
SUMMARY:Poincare Invariant Three-Body Scattering\, NPAC (Nuclear/Parti
cle/Astro/Cosmo) Forum\, Charlotte Elster\, Ohio University\, Athens
DESCRIPTION:An enormous effort has been made to understand and model t
he nuclear force. The next step is to apply those models in an environ
ment where three (or four) nucleons interact with each other and thoro
ughly test underlying assumptions of nuclear physics.
\n
\nTra
ditionally three-nucleon calculations are carried out by solving Fadde
ev equations in a partial wave truncated basis\, working either in mom
entum or coordinate space. We solve them directly as function of vecto
r variables. The key advantage of our approach lies in its applicabili
ty at higher energies\, where special relativity is expected to become
relevant. We investigate relativistic three-boson scattering in the f
ramework of Poincare invariant quantum mechanics. The main point here
is the construction of unitary irreducible representations of the Poin
care group\, both for noninteracting and interacting particles. For th
ree-body scattering the Faddeev scheme is reformulated relativisticall
y.
\n
\nComparison of scattering observables obtained from re
lativistic and non-relativistic calculations based on simple Yukawa-ty
pe interactions lead to observations that should be relevant for more
sophisticated interactions. These comparisons do not involve taking no
n-relativistic limits. Instead relativistic and non-relativistic three
-body calculations are compared that contain interactions fitted to th
e same two-body data. All of the observed differences result form the
different ways in which the two-body dynamics appears in the three-bod
y problem.
URL:https://www.physics.wisc.edu/events/?id=1495
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