Conveners
Lattice: Parallel II
- William Detmold (Massachusetts Institute of Technology)
Lattice: Parallel IV
- Huey-Wen Lin
Lattice: Parallel V
- Kostas Orginos
Description
Mini Symposium on Nucleon Spin Structure and Lattice QCD
Physics beyond the standard model involving heavy particles can be parameterized by effective field theories of new interactions between the standard model particles. The new interactions involving quarks and gluons are, however, dressed by the strong interactions before they can be observed as low energy properties of hadrons. Lattice QCD is currently the only systematically improvable...
We present a lattice QCD calculation of transverse momentum dependent parton distribution functions (TMDs) of protons using staple-shaped Wilson lines. For time-reversal odd observables, we calculate the generalized Sivers and Boer-Mulders transverse momentum shifts in SIDIS and DY cases, and for T even observables we calculate the transversity related to the tensor charge and the generalized...
In this talk we will discuss recent progress in nucleon structure using Lattice QCD simulations at or near to the physical value of the pion mass. Main focus will be given in observables such as the nucleon axial charge and the first moments of parton distributions, for both the valence and sea quark contributions, and discuss their implications on the spin content of the nucleon. We will...
Electromagnetic polarizabilities are important parameters for understanding the interaction between photons and hadrons. For most hadrons these quantities are poorly constrained experimentally since they can only be measured indirectly. Lattice QCD can be used to compute these quantities directly in terms of quark and gluons degrees of freedom, using the background field method. We present...
We present a lattice QCD calculation of the strange quark contribution to the proton’s magnetic moment and the charge radius at the physical pion mass. We perform a model independent extraction of the strange magnetic moment and strange charge radius from the electromagnetic form factors in the momentum transfer range of 0.051 GeV2 <∼ Q 2 <∼ 1.31 GeV2. The finite lattice spacing and finite...
In recent years, the quasi parton distribution has been introduced to extract the standard parton distribution functions by lattice QCD simulations. The quasi and standard distribution share the same collinear IR singularity and the quasi distribution can be factorized into the normal distribution with perturbative matching factors. The quasi parton distribution is known to have power-law UV...
Lattice quantum chromodynamics is well suited for evaluating matrix elements of local operators and so naturally provides the moments of distribution functions as defined through the operator product expansion procedure. Unfortunately, the reduced symmetry of the (hypercubic) lattice means that as the continuum limit is approached, the matrix elements of higher spin operators evaluated on the...
We report our recent lattice calculation of hadronic light-by-light contribution to muon g−2 using our recent developed moment method. The connected diagrams and the leading disconnected diagrams are included. The calculation is performed on a 483 × 96 lattice with physical pion mass and 5.5 fm box size. We expect sizable finite volume and finite lattice spacing corrections to the results of...
