<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Hey everyone,</div>
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Please join us Monday at 1pm in L102 for a seminar by Wei-Yang Liu (UConn). </div>
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Title: Hadronic Structure Emerged from Topological Vacuum — Buried treasure in the sand of the QCD sea</div>
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
Abstract: </div>
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
We develop an effective theory based on the low resolution structure of the QCD vacuum aligned with the gradient flow renormalization scheme where the QCD ensemble is modeled as a dilute liquid of instantons and anti-instantons with sea quarks hopping around
those topological gauge field configurations. With this picture, we construct a systematic density expansion with diagrammatic Feynman rules to nonperturbatively evaluate vacuum correlation functions, and hadron matrix elements (form factors) of light hadrons.
As a proof of principle, we compute the gluonic scalar, gravitational form factors, and C-odd three gluon operators to reveal the gluonic structure of hadrons. We also further apply the resulting form factors to analyze the gluon dominance in quarkonium photo-production
near the threshold. The results are in good agreement with current experiments and recent lattice QCD results, demonstrating that semiclassical vacuum theory provides a robust nonperturbative framework for quantitative predictions with clear physical interpretation
for hadron structure.</div>
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Aptos, "Aptos_EmbeddedFont", "Aptos_MSFontService", Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div class="elementToProof" id="Signature">
<div style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
<div style="font-family: Arial, Helvetica, sans-serif; font-size: 9.75pt; color: rgb(34, 34, 34);" class="elementToProof">
<span style="background-color: rgb(255, 255, 255);">--</span></div>
<div class="elementToProof" style="direction: ltr; text-align: left; font-family: Arial, Helvetica, sans-serif; font-size: 9.75pt; color: rgb(34, 34, 34);">
Joe Karpie</div>
<div class="elementToProof" style="direction: ltr; text-align: left; font-family: Arial, Helvetica, sans-serif; font-size: 9.75pt; color: rgb(34, 34, 34);">
Pronouns: He/His/Him</div>
<div class="elementToProof" style="direction: ltr; text-align: left; font-family: Arial, Helvetica, sans-serif; font-size: 9.75pt; color: rgb(34, 34, 34);">
Postdoctoral Fellow</div>
<div class="elementToProof" style="direction: ltr; text-align: left; font-family: Arial, Helvetica, sans-serif; font-size: 9.75pt; color: rgb(34, 34, 34);">
Theoretical and Computational Physics Center</div>
<div class="elementToProof" style="direction: ltr; text-align: left; font-family: Arial, Helvetica, sans-serif; font-size: 9.75pt; color: rgb(34, 34, 34);">
Jefferson Lab</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
<br>
</div>
</div>
</body>
</html>