Devdatta Mankame

Nucleon strangeness form factors from N(f) = 2+1 clover fermion lattice QCD

We study the strangeness electromagnetic form factors of the nucleon from the N_f=2+1 clover fermion lattice QCD calculation. The disconnected insertions are evaluated using the Z(4) stochastic method, along with unbiased subtractions from the hopping parameter expansion. In addition to increasing the number of Z(4) noises, we find that increasing the number of nucleon sources for each configuration improves the signal significantly. We obtain G_M^s(0) = -0.017(25)(07), where the first error is statistical, and the second is the uncertainties in Q^2 and chiral extrapolations. This is consistent with experimental values, and has an order of magnitude smaller error. We also study the strangeness second moment of the partion distribution function of the nucleon, _{s-\bar{s}}.

Lattice study of quark and glue momenta and angular momenta in the nucleon

We report a complete calculation of the quark and glue momenta and angular momenta in the proton. These include the quark contributions from both the connected and disconnected insertions. The quark disconnected insertion loops are computed with

Quark and Glue Momenta and Angular Momenta in the Proton --- a Lattice Calculation

Z_4

Light scalar mesons in 2+1 flavor full QCD

noise, and the signal-to-noise is improved with unbiased subtractions. The glue operator is comprised of gauge-field tensors constructed from the overlap operator. The calculation is carried out on a

Nucleon strangeness form factors and moments of PDF

16^3 \times 24

Strangeness and glue in the nucleon from lattice QCD

quenched lattice at

The calculation of nucleon strangeness form factors from N_f=2+1 clover fermion lattice QCD

\beta = 6.0

2+1 flavor QCD calculation of and

for Wilson fermions with

Nucleon strangeness form factors from N_f=2+1 clover fermion lattice

\kappa=0.154, 0.155

2+1 flavor QCD calculation of

, and