The strangeness of the nucleon, hN| ss|Ni-h0| ss|0i , is a quantity of interest for interpreting the results of dark matter detection experiments as well as for exploring the structure of the nucleon itself. We present a calculation of this quantity in 2+1 flavor lattice QCD using a range of lattice spacings and quark masses. The method is based on calculating quark-line disconnected contributions on the MILC lattice configurations, which include the effects of dynamical strange quarks. After continuum and chiral extrapolations, the value is hN| ss|Ni-h0| ss|0i = 0.69±0.07stat±0.09sys in the ms(2GeV) regularization.
|Proceedings of Science
|Published - 2009
|27th International Symposium on Lattice Field Theory, LAT 2009 - Beijing, China
Duration: Jul 26 2009 → Jul 31 2009
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