<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div data-marker="__QUOTED_TEXT__"><div style="font-family:'arial' , 'helvetica' , sans-serif;font-size:12pt;color:#000000">
<div>
<div style="font-family:'arial' , 'helvetica' , sans-serif;font-size:12pt;color:#000000">
<div>
<div style="font-family:'arial' , 'helvetica' , sans-serif;font-size:12pt;color:#000000">
<div>
<div style="font-family:'arial' , 'helvetica' , sans-serif;font-size:12pt;color:#000000">
<div>
<div style="font-family:'arial' , 'helvetica' , sans-serif;font-size:12pt;color:#000000">
<div>
<div>
<div>
<div id="zimbraEditorContainer" class="6">
<div>
<div class="WordSection1"><strong style="font-weight:bold"></strong><font face="Times New Roman, Times, serif"><span style="font-family:'roman' 'times'"><span style="font-size:12pt"><strong><b><span style="font-family:'roman' 'times'">Wednesday,
October 4, 2023 - IAS
Physics Group Meeting<br>
<br>
</span></b><span style="font-family:'roman' 'times'"></span></strong><span style="font-family:'roman' 'times'">"Exploring the
Infrared Structure of Massless
Gauge Theories"<br>
<br>
Location: Wolfensohn Hall <font color="#ff0000"><b>(NOTE
LOCATION CHANGE)</b></font><br>
<br>
Time: 2:30 PM <font color="#ff0000"><b>(NOTE
TIME CHANGE)</b></font><br>
<br>
Speaker: <font face="Times
New Roman, Times, serif">Lorenzo
Magnea, Torino University</font></span></span></span></font><span style="font-family:'georgia' , serif"><span style="color:#000000;font-size:12pt;font-family:'new roman' 'times'"><font face="Times New Roman, Times,
serif"><br>
<br>
<b>Abstract: </b> I will briefly
review the factorisation of soft
and collinear singularities in
massless gauge theory
amplitudes, and the structure of
the soft anomalous dimension
matrix. I will then discuss the
implications of this
factorisation for the problem of
infrared subtraction at high
orders, which is a very active
area of research for precision
phenomenology at colliders.
Finally, I will present a recent
theoretical development, showing
that the infrared factor for a
generic massless gauge theory
amplitude, in the dipole
approximation, but to all orders
in perturbation theory, is given
by a correlator of colorful
vertex operators in a conformal
field theory on the celestial
sphere.</font><br>
</span></span>
<div class="WordSection1" style="color:#000000;font-family:'roman' 'york'">
<p class="MsoDate" style="margin:0px"><br>
</p>
<hr width="100%" size="2"></div>
</div>
<span style="color:#000000;font-family:'roman';font-size:12pt"></span><font face="Times New Roman, Times, serif"><span style="color:#000000;font-family:'roman' 'times'">To view the calendar
online, go to:</span> <span style="color:#000000;font-family:'roman' 'times'"> </span> </font>
<p class="MsoNormal" style="color:#000000;font-family:'roman' 'york'"><font face="Times New Roman,
Times, serif"><a href="https://www.ias.edu/sns/events/physics" rel="nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer" target="_blank">https://www.ias.edu/sns/events/physics</a><span style="font-size:12pt"></span></font></p>
<font face="Times New Roman, Times,
serif"> </font>
<pre class="moz-signature" style="color:rgb( 0 , 0 , 0 );font-size:12pt"><font face="Times New Roman, Times, serif">---------------------
Lisa Fleischer
Academic Assistant
School of Natural Sciences
Institute for Advanced Study
1 Einstein Drive
Princeton, NJ 08540
<a href="mailto:lisa@ias.edu" rel="nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer" target="_blank">lisa@ias.edu</a></font></pre>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
</div>
</div>
<br>
</div>
</div>
<br>
</div>
</div><br></div></div></body></html>