Strange quark content of the nucleon

Details Strange quark content of the nucleon Strange quark content of the nucleon

2009-01-28

arxiv.org/abs/0901.4569v1

PoS LATTICE2008:160,2008

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 5 figures, presented at the XXVI International Symposium on Lattice Field Theory (Lattice 2008), Williamsburg, Virgin

Scientific paper

We discuss the calculation of disconnected diagrams needed for determining the strange quark content of the nucleon on the lattice. We present results for the strange scalar form factor and the related parameter f_Ts, which enters into the cross-section for the scattering of dark matter off nuclei in supersymmetric extensions of the standard model. In addition, we present results for the strange contribution to the nucleon's axial and electromagnetic form factors. The calculations were performed with two dynamical flavors of Wilson fermions on a 24^3 x 64 anisotropic lattice with a_s = 3a_t = 0.11 fm and M_pi ~ 400 MeV.

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