[Theory-seminars] Theory seminar next Monday: Tim Harris

[Astrid Hiller Blin]

Dear all,

Next Monday, June 7 at *9:00 AM* (note the unusual time), Tim Harris will
give a theory seminar on https://bluejeans.com/801786278
<https://www.google.com/url?q=https://bluejeans.com/801786278/5878?src%3DcalendarLink&sa=D&source=calendar&usd=2&usg=AOvVaw25sgt91GOrFua-h6qKqY9J>,
see below for details.

Especially now, since we are expecting our *HUGS summer school students to
join this seminar* and want to make them feel welcome, please provide your
full names when logging on to the meeting!

We are now recording our seminars, and the slides and videos can be found
in the archives:
https://www.jlab.org/theory/seminars/2021seminars

*Theory seminar*
Monday, June 7, *9:00 AM*

*Tim Harris* (University of Edinburgh) will talk about "Electromagnetic
probes of the quark-gluon plasma from lattice QCD".

*Abstract:*
The structure of strongly-interacting matter at finite temperature is not
as well understood as hadrons in the vacuum. Photons and leptons are
important
probes which can help us to decide on the qualitative features of the
medium, and are also relevant to heavy-ion collision phenomenology. In this
talk I
will review some recent progress on constraining the thermal photon
emissivity of the QGP from euclidean correlators computed in lattice QCD,
which
can be compared with scenarios from weakly or strong-coupled models of the
medium. A first look at fixed-virtuality correlators will be presented
which
offers an alternative strategy to constrain the thermal emissivity via
novel dispersion relations. The connection of fixed-virtuality correlators
to the structure
functions of the QGP, which parameterize the scattering of a lepton on the
medium, will be discussed. Their interpretation could reveal how the fluid
nature
of the QGP emerges from the underlying partonic degrees of freedom.

Enjoy the (hopefully) sunny weekend,
Astrid, Christos and 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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