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Dear all,<br class="">
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<span style="font-family: Arial, Helvetica, sans-serif; font-size: medium; background-color: rgb(255, 255, 255);" class="">Here is a reminder for</span><span style="margin: 0px; font-size: medium; font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);" class=""> the
theory seminar</span><span style="margin: 0px; font-size: medium; font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);" class=""> tomorrow</span><span style="font-family: Arial, Helvetica, sans-serif; font-size: medium; background-color: rgb(255, 255, 255);" class="">:</span><br class="">
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<span style="color: rgb(34, 34, 34); font-family: Arial, Helvetica, sans-serif; font-size: medium; background-color: rgb(255, 255, 255);" class=""><span style="color: rgb(0, 0, 0);" class=""><b class=""><u class="">Theory seminar:</u></b></span><br class="">
<div class=""><span style="color: rgb(0, 0, 0);" class="">Monday, August 5, 1:00PM, Room L102</span><br class="">
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<div class=""><span style="color: rgb(0, 0, 0);" class="">Fabio Siringo (</span><span style="color: rgb(0, 0, 0);" class="">Università degli Studi di Catania</span><span style="color: rgb(0, 0, 0);" class="">) "</span><span style="color: rgb(0, 0, 0);" class="">Perturbation
Theory of Non-Perturbative QCD"</span><br class="">
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<div class=""><span style="color: rgb(0, 0, 0);" class="">Abstract:</span><br class="">
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<div class=""><span style="color: rgb(0, 0, 0);" class="">A purely analytical approach to non-perturbative QCD is discussed. The exact, gauge-fixed, Faddeev-Popov Lagrangian of Yang-Mills theory is studied by the screened massive expansion which emerges from
a mere change of the expansion point of ordinary perturbation theory. The gluon propagator has gauge-invariant complex conjugated poles which might give a direct dynamical proof of gluon confinement. Their genuine nature is discussed. Because of BRST symmetry,
the analytic properties and the poles are shown to play a central role in the optimization of the expansion, which becomes a very predictive and ab initio tool. While in excellent agreement with the lattice data in the Euclidean space, the expansion provides
valuable information in sectors which are not easily explored on the lattice, like Minkowski space and a generic covariant gauge. Moreover, even in the Euclidean space, the method gives a lattice-independent estimate of the running coupling in the continuum
limit</span>.</div>
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<div class=""><span style="font-size: 12pt; font-family: Calibri, Arial, Helvetica, sans-serif; color: black;" class="">Bluejeans connection: </span><span style="color: rgb(32, 31, 30); font-size: 15px;" class=""><a href="https://bluejeans.com/610445877" target="_blank" rel="noopener noreferrer" class=""><span style="font-size: 12pt; font-family: Calibri, Arial, Helvetica, sans-serif; color: rgb(23, 78, 134);" class="">https://bluejeans.com/610445877</span></a></span><span style="font-size: 12pt; font-family: Calibri, Arial, Helvetica, sans-serif; color: rgb(23, 78, 134);" class=""> </span></div>
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<pre cols="72" style="color: rgb(32, 31, 30); font-size: 15px;" class=""><span style="margin: 0px; font-size: 12pt; font-family: Arial, Helvetica, sans-serif;" class="">Carlota</span><span style="font-family: Arial, Helvetica, sans-serif; font-size: 12pt;" class="">, Miguel & Raza</span></pre>
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