TY - JOUR
T1 - The strange quark content of the nucleon in 2+1 flavor lattice QCD
AU - Freeman, Walter
AU - Toussaint, Doug
N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
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M3 - Conference article
SN - 1824-8039
VL - 91
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 27th International Symposium on Lattice Field Theory, LAT 2009
Y2 - 26 July 2009 through 31 July 2009
ER -