University of Connecticut

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Particle, Astrophysics, And Nuclear Physics Seminar

Monday, November 29, 2021
2:00pm – 3:00pm

Storrs Campus
GS-119

Prof. Martha Constantinou, Temple University

Beyond Leading-Twist Proton Structure from Lattice QCD: The Twist-3 Case

Parton distribution functions (PDFs) have a central role in understanding the hadron structure and have been calculated in lattice QCD mainly via their Mellin moments. The landscape of roton structure has changed with new methods to access the x dependence of distribution functions. In this talk, we will present results using the approach of quasi-distributions, which relates lattice data to light-cone distributions. The method relies on matrix elements of fast-moving hadrons coupled to non-local operators. These are matched to the light-cone PDFs using Large Momentum Effective Theory (LaMET). I will present the twist-2 unpolarized, helicity and transversity GPDs, and also also demonstrate the feasibility of the approach for twist-3 PDFs and GPDD explored in lattice QCD for the first time. The calculation is performed on one ensemble of two degenerate light, a strange and a charm quark (Nf=2+1+1) of maximally twisted mass fermions with a clover term, reproducing a pion mass of 260 MeV.

Contact:

Prof. Luchang Jin

Physics Department (primary), College of Liberal Arts and Sciences, UConn Master Calendar

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