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Dear colleagues,<br>
<br>
I would like to invite you to the following seminar,<br>
<br>
Dr. Tomislav Prokopec<br>
(Institute for Theoretical Physics, Utrecht, The Netherlands)<br>
<br>
"<span style="color: rgb(0, 0, 0);">Weyl </span><span style="
color:#000000;">symmetry in the standard model and gravity</span><span
style=" color:#000000;">"<br>
<br>
</span><span style=" color:#000000;"><span style=" color:#000000;">Wednesday</span>
31st May, 11:00h, F-201<br>
<br>
Weyl symmetry is realized in Cartan-Einstein gravity both at the
kinematical and dynamical level because of geometric torsion. The
symmetry can be naturally extended to matter fields by a suitable
generalization of covariant derivative and by supplementing a
dilaton field. Fermionic matter sources skew symmetric torsion
while scalar matter sources vectorial torsion trace (gauge fields
do not trace torsion). This implies that, when matter fields are
integrated out, vectorial torsion and skew symmetric torsion
become dynamical. Next, I will discuss Ward identities and how
trace anomaly can be reinterpreted in this theory. Finally, I will
discuss some physical implications of our results, in particular
how torsion can be seen by conventional gravitational wave
detectors.<br>
<br>
</span><br>
<span style=" color:#000000;">Best regards,<br>
Ivica Smolić<br>
</span>
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