APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019;
Denver, Colorado
Session Q06: New Developments in Computing Hadron Structure
Invited
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Sponsoring Units: DCOMP GHP
Chair: Swagato Mukherjee, Brookhaven National Laboratory
Room: Sheraton Governor's Square 15
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Monday, April 15, 2019
10:45AM - 11:21AM
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Q06.00001: Parton distribution inside the pion from lattice QCD
Invited Speaker:
Nikhil Karthik
We will present our lattice computation of the valence Parton Distribution Function of 300 MeV pion. For this work, we use perturbative matching of the Euclidean RI-MOM renormalized quasi Parton Distribution Function that we compute on HISQ ensembles with 0.06 and 0.04 fm lattice spacings. In addition, we will discuss the validity of leading order perturbative matching and other systematic effects that potentially enter such lattice computations of PDF. |
Monday, April 15, 2019
11:21AM - 11:57AM
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Q06.00002: Non-perturbative studies of Parton Distribution Functions
Invited Speaker:
Kostas Orginos
Parton distribution functions (PDFs) encode the non-perturbative structure of hadrons and their knowledge is essential for our ability to predict experimentally measured cross sections. They play an important role in discovering new physics at high energy collider experiments as well as in our understanding of the internal structure of hadrons. However, up until recently, PDFs could only be determined from experimental data while first principles theoretical computations were not possible. Novel ideas that came along have opened new avenues for ab initio parton distribution function computations. In this talk, I am presenting the basic ideas that are underlying these computations and review recent numerical results. Furthermore, I am discussing the future of such computations and their potential impact to phenomenology. |
Monday, April 15, 2019
11:57AM - 12:33PM
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Q06.00003: Hadron structure from current-current correlation functions in Lattice QCD
Invited Speaker:
Raza S Sufian
It has been shown that a class of matrix elements of two spatially-separated currents, which are computable directly in Lattice QCD, can be factorized into parton distribution functions with calculable hard coefficients [Phys.Rev.Lett. 120 (2018) no.2, 022003]; in the same manner as the parton distribution functions are extracted from the hadronic cross sections measured in an experiment. We will discuss this most generalized method to obtain parton distribution functions from a Lattice QCD calculation.
We also discuss the direct Lattice QCD calculation of hadronic tensor which can shed light on the understanding of parton physics in the deep inelastic scattering (DIS) region and neutrino-nucleus scatterings in the shallow inelastic scattering (SIS) region. In this talk, we will briefly introduce the framework of calculating hadronic tensor on the lattice and present some preliminary results.
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