[Theory-seminars] Theory seminar and farewell for Raza and Tianbo next week

[Astrid Hiller Blin]

Dear all,

Since Raza and Tianbo are leaving JLab soon, let us meet in the usual BJ
link (below) before next week's theory seminar at* 12:30 PM* to bid them
farewell. Please join us to thank them for the important contribution they
offered to the Theory Center and wish them good luck in their next steps.

Here is the reminder of next week's theory seminar:

*Theory seminar*
Monday September 14, 1:00 PM

*Glòria Montaña* (University of Barcelona) will talk about "Thermal
modification of open-charm mesons from an effective hadronic theory".

*Abstract:*
The high-temperature and vanishing baryon density regime of the QCD phase
diagram, where the quark-gluon plasma (QGP) is expected to be produced, is
explored experimentally with heavy-ion collisions at RHIC and LHC. Due to
the large mass and relaxation time of the c quark, charmed mesons are a
powerful probe of the QGP and a proper theoretical understanding of their
propagation in a hot medium is required. While lattice QCD is becoming an
increasingly important tool in this regime, we employ a complementary
theoretical approach that allows one to reach the QGP transition from the
hadron phase. In particular, we study the modification of open-charm mesons
in a hot mesonic medium below Tc within an effective field theory based on
chiral and heavy-quark spin-flavor symmetries within the imaginary-time
formalism. The in-medium unitarized amplitudes of the scattering of the
heavy mesons with the pseudoscalar light mesons and the ground-state
self-energies are calculated self-consistently. We show that the D(∗) and Ds
(∗) mesons acquire a substantial width and their masses drop with
increasing temperatures. This also implies the thermal modification of the
excited mesonic states generated dynamically in our heavy-light molecular
model, namely the nonstrange D0*(2300) and D1*(2430) mesons, as well as the
Ds0*(2317) and Ds1*(2460) resonances. From the thermal ground-state
spectral functions we have computed for the first time open-charm Euclidean
correlators that can be compared with those obtained with lattice QCD. For
temperatures well below Tc we obtain a similar behavior to that found in
the lattice, upon the inclusion of the full-energy dependent spectral
functions in the calculation of the Euclidean correlators.

Bluejeans connection: https://bluejeans.com/801786278
<https://urldefense.proofpoint.com/v2/url?u=https-3A__bluejeans.com_801786278&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=AIMSQQ81YDyrZuJNGks2qw&m=aT_3J5jjiFmHtFXffqbfPqEY_A73NEWw2ebyFyL_eCA&s=YNm3qgT5e8sJgKfZ9vFA_w--imuXwmeAjg0C4AslLwg&e=>

Best wishes,
Astrid, Christos, Filippo, Miguel
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