Talk presented by Nilmani Mathur

Parallel Session: Matrix Elements I

Tuesday June 29th, 17.40 - 18.00, Auditorium

Proton Spin Content from Lattice QCD

Abstract: We calculate the quark energy momentum tensor form factor and thereby extract the quark orbital angular momentum in the nucleon. The calculation is done on a quenched $16^3 \times 24$ lattice at $\beta = 6.0$ with Wilson fermions and with $\kappa$ = 0.148, 0.152, 0.154 and 0.155. We estimate the disconnected insertion stochastically which employs the $Z_2$ noise with an unbiased subtraction. This proves to be an effective method to reduce the error. From our result it is also possible to deduce the gluon spin contribution.

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