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Hello everyone,</div>
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Alex's presentation will be rescheduled to Oct 8th. Sorry for the inconvenience and lack of cake. Also please sign up! </div>
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Best,</div>
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Joe</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Theory-seminars <theory-seminars-bounces@jlab.org> on behalf of Joseph Karpie via Theory-seminars <theory-seminars@jlab.org><br>
<b>Sent:</b> Monday, September 15, 2025 2:36 PM<br>
<b>To:</b> Adam Freese via Theory-seminars <theory-seminars@jlab.org><br>
<b>Subject:</b> [Theory-seminars] Cake Seminar Wednesday</font>
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Hey everyone,</div>
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On Wednesday at 1pm, please join us in F224-225 where Alex Sturzu (WM) will be giving a cake seminar. </div>
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Zoom: <a id="LPlnk110112" href="https://jlab-org.zoomgov.com/j/1603813039?pwd=cW2279bamHTYX8wRoTfzo0MpgVaO1l.1">
https://jlab-org.zoomgov.com/j/1603813039?pwd=cW2279bamHTYX8wRoTfzo0MpgVaO1l.1</a></div>
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Title: Flowed gluon momentum fractions: A gradient flow-based renormalization approach </div>
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The parton momentum fractions carry important information about the nucleon mass and spin decompositions. Specifically, determining the gluon contribution to nucleon momentum is a key step in achieving a better understanding of the nucleon structure. In this
talk I present recent work by the HadStruc collaboration on determining the gluon momentum fraction from lattice quantum chromodynamics using a novel renormalization procedure based on the gradient flow, a nonperturbative damping of ultraviolet fluctuations.
The ratio of three- to two-point correlation functions, constructed from nucleon and gluon operators, are used to build linear combinations of different matrix elements that ultimately provide access to the momentum fraction. The use of distillation and the
variational method to improve the signal of the nucleon states will also be discussed. The nonperturbative renormalization and MS-bar scheme matching is done via a set of coefficients built from the short flow-time expansion. The application of these coefficients
are detailed.</div>
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Best,</div>
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Adam, Joe, and Pia</div>
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Joe Karpie</div>
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Pronouns: He/His/Him</div>
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Postdoctoral Fellow</div>
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Theoretical and Computational Physics Center</div>
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Jefferson Lab</div>
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