Strange Quark Contribution to Nucleon Form Factors

Collaborators:

Abstract:

We propose to continue our program of measuring the strange quark contribution to the electroweak elastic nucleon form factors G_E^s(Q²), G_M^s(Q²), G_S^s(Q²), G_A^s(Q²). Our plan is to use clover Wilson fermions on the anisotropic clover lattices that are now being generated by members of LHPC on the Cray XT3 at Oak Ridge. We will continue the evaluation and development of multi-level methods for calculating disconnected diagrams which will facilitate calculation with light quarks in preparation for a future project. This collaboration will use the best available methods to determine the disconnected contribution to a wide range of observables needed in the LHPC Hadron Structure program. To complete this stage of the strange quark project we are asking for 400,000 6n-equivalent node hours.

Progress:

We are currently calculating the currents on the 2 flavor anisotropic Wilson lattices being generated by LHPC.