<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;" data-mce-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;" data-mce-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;" data-mce-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;" data-mce-style="font-family: 'arial' , 'helvetica' , sans-serif; font-size: 12pt; color: #000000;"><div><div id="zimbraEditorContainer" class="6"><div><div class="WordSection1"><span style="font-family: Times New
Roman, Times, serif;">The Institute for Advanced Study requires that all adult visitors, collaborators, conference and on-campus seminar attendees and outside vendors coming to the Institute are required to have completed a COVID-19 vaccination and booster in order to enter the IAS campus. Individuals must be prepared to present proof of vaccination if asked and are expected to follow the Institute's Covid-19 Procedures. Masks are optional while indoors.<br><br>Additional information can be found at:<br></span><span style="font-family: Times New Roman, Times, serif;"><a href="https://www.ias.edu/covid-19-procedures" rel="nofollow noopener noreferrer nofollow noopener noreferrer" target="_blank" data-mce-href="https://www.ias.edu/covid-19-procedures">https://www.ias.edu/covid-19-procedures</a></span><br><p style="margin-top: 0px; margin-bottom: 0px; color: #3e3e3e; font-family: 'gill-sans-nova' , sans-serif; font-size: 21px; font-style: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px;" data-mce-style="margin-top: 0px; margin-bottom: 0px; color: #3e3e3e; font-family: 'gill-sans-nova' , sans-serif; font-size: 21px; font-style: normal; font-weight: 400; letter-spacing: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px;"><strong style="font-weight: bold;" data-mce-style="font-weight: bold;"><br></strong></p><span style="font-family: Times New Roman, Times, serif;"> </span><div class="MsoNormal" style="color: #000000; font-family: 'times new roman' , 'york center';" align="center" data-mce-style="color: #000000; font-family: 'times new roman' , 'york center';"><hr width="100%" size="0" align="center"></div><span style="font-family: Times New Roman, Times, serif;"> <span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><strong></strong></span></span><span style="font-family: 'times new roman' , serif;" data-mce-style="font-family: 'times new roman' , serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><span style="font-family: Times New
Roman, Times, serif;"><br></span></span></span><p class="MsoDate" style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-family: Times New Roman, Times, serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><strong><b><span style="font-family: 'roman' 'times';" data-mce-style="font-family: 'roman' 'times';">Tuesday, March 14, 2023 - IAS Amplitudes Group Meeting<br><br></span></b></strong><span style="font-family: 'roman' 'times';" data-mce-style="font-family: 'roman' 'times';">"Physics of the Analytic S-Matrix"</span><span style="font-family: 'roman' 'times';" data-mce-style="font-family: 'roman' 'times';"><br><br><!--StartFragment--></span></span></span></p><p style="margin:0px" data-mce-style="margin: 0px;"><span style="font-family: Times New Roman, Times, serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><span style="font-family: 'roman' 'times';" data-mce-style="font-family: 'roman' 'times';">Location: Bloomberg Lecture Hall (IAS) & Zoom</span></span></span></p><p style="margin:0px" data-mce-style="margin: 0px;"><span style="font-family: Times New Roman, Times, serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><span style="font-family: 'roman' 'times';" data-mce-style="font-family: 'roman' 'times';"><br></span></span></span></p><p style="margin:0px" data-mce-style="margin: 0px;"><span style="font-family: Times New Roman, Times, serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><span style="font-family: 'roman' 'times';" data-mce-style="font-family: 'roman' 'times';">Zoom Link: <a href="https://theias.zoom.us/j/85881439454?pwd=L1g4ZXc3UG1iM0w0MDAwN1VsRnRWdz09" rel="nofollow noopener noreferrer" target="_blank" data-mce-href="https://theias.zoom.us/j/85881439454?pwd=L1g4ZXc3UG1iM0w0MDAwN1VsRnRWdz09">https://theias.zoom.us/j/85881439454?pwd=L1g4ZXc3UG1iM0w0MDAwN1VsRnRWdz09</a></span></span></span></p><p class="MsoDate" style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-family: Times New Roman, Times, serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><span style="font-family: 'roman' 'times';" data-mce-style="font-family: 'roman' 'times';"><!--EndFragment--> <br></span></span></span></p><p class="MsoDate" style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-size: 12pt; font-family: "Times New Roman", Times, serif;">Time: 2:00 PM</span><br></p><p class="MsoDate" style="margin: 0px;" data-mce-style="margin: 0px;"><span style="font-family: Times New Roman, Times, serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><span style="font-family: 'roman' 'times';" data-mce-style="font-family: 'roman' 'times';"><br>Speaker: Sebastian Mizera, Member, School of Natural Sciences, IAS</span></span></span><span style="font-family: Times New Roman, Times, serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><span style="font-family: 'roman' 'times';" data-mce-style="font-family: 'roman' 'times';"></span></span></span></p><span style="font-family: 'times new roman' , serif;" data-mce-style="font-family: 'times new roman' , serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><span style="font-family: Times New Roman, Times, serif;"> <br><b>Abstract: </b>You might've heard about various mathematical properties of scattering amplitudes such as analyticity, sheets, branch cuts, discontinuities, etc. What does it all mean? In these lectures, we'll take a guided tour through simple scattering problems that will allow us to directly trace such properties back to physics. We'll learn how different analytic features of the S-matrix are really consequences of causality, locality of interactions, unitary propagation, and so on.<br><br>This talk is a part of a series of lectures aimed at graduate students. The first one will focus on the link between analyticity, causality, and dispersive properties of media.<br><br></span></span></span><span style="font-family: 'times new roman' , serif;" data-mce-style="font-family: 'times new roman' , serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"></span></span><span style="font-family: 'times new roman' , serif;" data-mce-style="font-family: 'times new roman' , serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"></span></span><span style="font-family: 'times new roman' , serif;" data-mce-style="font-family: 'times new roman' , serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"><span style="font-family: Times New
Roman, Times, serif;"> </span> </span></span><p class="MsoNormal" style="color: #000000; font-family: 'times new roman' , 'york'; font-size: 12pt; margin: 0px;" data-mce-style="color: #000000; font-family: 'times new roman' , 'york'; font-size: 12pt; margin: 0px;"><strong></strong><span style="font-family: Times New Roman, Times, serif;"><strong></strong></span><br></p><p class="MsoNormal" style="color: #000000; font-family: 'times new roman' , 'york'; font-size: 12pt; margin: 0px;" data-mce-style="color: #000000; font-family: 'times new roman' , 'york'; font-size: 12pt; margin: 0px;"><span style="font-family: Times New Roman, Times, serif;"><strong></strong></span><br></p><div class="WordSection1" style="color: #000000; font-family: 'times new roman' , 'york'; font-size: 12pt;" data-mce-style="color: #000000; font-family: 'times new roman' , 'york'; font-size: 12pt;"><p class="MsoDate" style="margin: 0px;" data-mce-style="margin: 0px;"><strong></strong><br></p><hr width="100%" size="2"></div></div><span style="color: #000000; font-family: 'roman'; font-size: 12pt;" data-mce-style="color: #000000; font-family: 'roman'; font-size: 12pt;"></span><span style="color: #000000; font-size: 12pt; font-family: Times New Roman, Times, serif;" data-mce-style="color: #000000; font-size: 12pt; font-family: Times New Roman, Times, serif;">To view the calendar online, go to:</span> <span style="color: #000000; font-family: Times New Roman, Times, serif; font-size: 12pt;" data-mce-style="color: #000000; font-family: Times New Roman, Times, serif; font-size: 12pt;"> </span><p class="MsoNormal" style="color: #000000; font-family: 'times new roman' , 'york'; font-size: 12pt;" data-mce-style="color: #000000; font-family: 'times new roman' , 'york'; font-size: 12pt;"><a href="https://www.ias.edu/sns/events/physics" rel="nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer nofollow noopener noreferrer" target="_blank" data-mce-href="https://www.ias.edu/sns/events/physics"><span style="font-family: Times New
Roman, Times, serif;">https://www.ias.edu/sns/events/physics</span></a><br></p><hr style="color: #000000; font-family: 'arial' , 'helvetica' , sans-serif; font-size: 12pt;" width="100%" size="2" data-mce-style="color: #000000; font-family: 'arial' , 'helvetica' , sans-serif; font-size: 12pt;"><span style="font-family: Times New Roman, Times, serif;"><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;">---------------------<br></span><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;">Lisa Fleischer<br></span><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;">School of Natural Sciences<br></span><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;">Institute for Advanced Study<br></span><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;">1 Einstein Drive<br></span><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;">Princeton, NJ 08540<br></span><span style="font-size: 12pt;" data-mce-style="font-size: 12pt;"></span><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" style="font-size: 12pt;" target="_blank" data-mce-href="mailto:lisa@ias.edu" data-mce-style="font-size: 12pt;">lisa@ias.edu</a></span></div></div><br></div></div><br></div></div><br></div></div></div></div><br></div></div></body></html>