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<div style="font-family: arial,helvetica,sans-serif; font-size:
12pt; color: #000000">Theory Center Seminar<br>
Monday, March 19, 2018<br>
1:00 p.m. (coffee at 12:45 p.m.)<br>
CEBAF Center, <b>Room F113</b><br>
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<p> <br>
Gautham Rupak <br>
Mississipi State University<br>
<br>
<b>Fate of the Neutron-Deuteron Virtual State as an Efimov
Level </b><br>
<br>
The emergence of Efimov levels in a three-body system is
investigated near the unitarity limit characterized <br>
by resonating two-body interaction. The triton was one of
the three-body systems studied by Efimov. No direct <br>
evidence of Efimov levels was found as triton is the only
physical bound state in this system. However, this system<br>
supports a virtual state. We show that the virtual state
evolves into a shallow bound state emerging as an excited <br>
triton as we drive the system towards unitarity. We provide
a model-independent analysis at low energy by formulating <br>
a consistent effective field theory for neutron-deuteron
scattering. The results presented are universal to atomic, <br>
nuclear and particle physics though we considered a
particular system to study the emergence of the Efimov
levels. <br>
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The link to attend remotely via BlueJeans is available at <a
class="moz-txt-link-freetext"
href="https://www.jlab.org/div_dept/theory/seminars/2018-spring-theory-seminar.html"
target="_blank">https://www.jlab.org/div_dept/theory/seminars/2018-spring-theory-seminar.html</a>
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