Theory Seminar: Anthony Grebe

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Speaker: Anthony Grebe (FermiLab)

Title: Computing the Pion Light-Cone Distribution Amplitude Using the Heavy-Quark Operator Product Expansion

Abstract: The light-cone distribution amplitude (LCDA) of the pion carries information about the momentum distribution of its quarks, which is an important input to various experiments. The LCDA can be expanded in terms of its Mellin moments, which combined contain all information about the distribution amplitude. I will present our calculation of the second Mellin moment using the heavy-quark operator product expansion (HOPE) method, giving a result in good agreement with complementary methods. I will also discuss ongoing work to compute the more challenging fourth moment, as well as refinements to our second moment calculation.

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