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<div><b><font face="Times New Roman, Times, serif">High
Energy Theory Seminar -- Monday, May 3, 2021</font></b><font
face="Times New Roman, Times, serif"><br>
<br>
"Conformal Colliders Meet the LHC"<br>
<br>
Location: via ZOOM -- Time: 2:30 PM<br>
<br>
Ian Moult, Stanford University<br>
<br>
<b><font color="#0000ff">To connect to the HET
Seminar via Zoom, please click the following
link:<br>
<br>
</font></b><font color="#0000ff"><font
color="#000000"><a
href="https://theias.zoom.us/j/83432499354?pwd=TkhMZWFJK2E1UzRyeUppU01pZVQwUT09"
rel="nofollow noopener noreferrer nofollow
noopener noreferrer nofollow noopener
noreferrer nofollow noopener noreferrer"
target="_blank" moz-do-not-send="true">https://theias.zoom.us/j/83432499354?pwd=TkhMZWFJK2E1UzRyeUppU01pZVQwUT09</a><br>
<br>
Abstract: Lightray operators have played an
important role in numerous recent developments
in conformal field theory. These operators,
and their associated operator product
expansion (OPE), also play a central role in
collider experiments, where they govern the
flow of energy at small angles. <br>
<br>
Taking advantage of recent experimental and
theoretical progress in understanding the
structure of jets at the LHC, a field referred
to as jet substructure, I will show that one
can directly measure the shape dependence and
scaling properties of multipoint correlators
of energy flow operators in LHC data.
Remarkably, the exceptional quality of the
data allows basic properties, such as the
convexity of the twist-two anomalous
dimensions governing the OPE, to be
immediately seen by eye. This rich dataset
provides an opportunity for an interesting
interplay between recent developments in CFT
and LHC phenomenology.<br>
<br>
In the second part of the talk, I will
describe progress in understanding the
perturbative structure of multipoint
correlators of energy flow operators, focusing
on the case of the three-point correlator. I
will show that the three-point correlator
takes a remarkably simple form in perturbation
theory, admitting a representation in terms of
dual Feynman integrals. This perturbative data
also provides a playground for understanding
the lightray OPE in a non-trivial context,
leading to the observation of some interesting
features, such as analyticity in the
transverse spin of the lightray operators
appearing in the OPE. </font></font><b><font
color="#0000ff"><br>
</font></b></font>
<pre class="moz-signature">---------
Lisa Fleischer
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" target="_blank" moz-do-not-send="true">lisa@ias.edu</a></pre>
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