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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Strange Quark Content of the Nucleon using the Yang-Mills gradient flow

Jul 27, 2018, 2:00 PM
20m
104 (Kellogg Hotel and Conference Center)

104

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Standard Model Parameters and Renormalization Standard Model Parameters and Renormalization

Speaker

Jose Gabriel Reyes-Rivera (Michigan State University)

Description

The Yang-Mills gradient flow can be used to calculate the strange quark scalar content in nucleons using Lattice QCD. Given the renormalization properties of flowed operators, the procedure promises a reduction of the uncertainties in the determination of the spin independent (SI) elastic cross section of dark matter models involving WIMP-nucleon interactions. Chiral symmetry and a small flow-time expansion relate the scalar density at zero flow time to the pseudo-scalar density at non-zero flow time which can be calculated accurately on a lattice. The pseudo-scalar density is calculated on a 32^3×64 lattice using 2+1 flavor QCD gauge field configurations by PACS-CS with a spacing of a=0.0907 fm, β=1.90, m_π≅411 MeV. We show a preliminary result for the flow-time dependent vacuum to pion matrix elements and we discuss how it can be used to extract the strange quark scalar content in nucleons.

Primary author

Jose Gabriel Reyes-Rivera (Michigan State University)

Presentation Materials