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Dear all, </div>
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</span><span style="font-size: 14.67px;">On Monday, </span><span style="font-size: 11pt;">March</span><span style="font-size: 14.67px;"> 17<sup>th</sup>, 2025 at 1:00PM EDT,
</span><span style="font-size: 11pt;">we will have a hybrid seminar given by Dimitra Pefkou of University of California, Berkeley,
<b>in person in CC L102</b> and on the following Zoom link: </span></div>
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Please see below for the title and abstract. </div>
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<b><u>Theory Seminar</u></b>:<b> </b>March 17<sup>th</sup>, 1pm EDT (hybrid) </div>
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<b><u>Speaker</u></b>: Dimitra Pefkou (University of California, Berkeley) </div>
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<span style="color: black;"><b><u>Title</u></b>:<b> </b></span><span style="color: rgb(0, 0, 0); background-color: white;">Moments of Parton Distribution Functions From Lattice QCD</span><span style="color: black;"> </span></div>
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<span style="color: black;"><b><u>Abstract</u></b>: </span><span style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); line-height: 1.284;">Parton distribution functions (PDFs) are crucial to the understanding of the internal structure of hadrons,
and their precise determination is necessary for searches of “beyond the Standard Model” physics in collider experiments. Directly accessing PDFs in lattice QCD calculations is impossible due to the Euclidean space-time geometry. Mellin moments of PDFs are
defined in terms of local operators that can be computed in lattice QCD but suffer from power divergent mixing beyond a certain order due to the reduced symmetry of the hypercubic lattice. Recently, a method was proposed to use gradient flow in order to circumvent
this mixing and access moments of PDFs of any order. In this talk, I will discuss the implementation of this method and present preliminary results on moments of the unpolarized isovector PDF of the pion using four stabilized Wilson fermion ensembles generated
by the OpenLat initiative.</span><span style="color: black;"> </span></div>
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See you on Monday. </div>
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Best regards, </div>
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Joe, Zheng-Yang, Gloria and Adam</div>
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