TY - JOUR

T1 - Initial nucleon structure results with chiral quarks at the physical point

AU - RBC and LHP collaborations

AU - Syritsyn, S.

AU - Blum, T.

AU - Engelhardt, M.

AU - Green, J.

AU - Izubuchi, T.

AU - Jung, C.

AU - Krieg, S.

AU - Lin, M.

AU - Meinel, S.

AU - Negele, J.

AU - Ohta, S.

AU - Pochinsky, A.

AU - Shintani, E.

N1 - Funding Information:
We thank the RBC and UKQCD collaborations for providing us with the gauge configurations. Computations for this work were carried out on facilities of the USQCD Collaboration, which are funded by the Office of Science of the U.S. Department of Energy. This work was supported by RIKEN Foreign Postdoctoral Researcher Program (S.N.S.) and the U.S. Department of Energy (DOE) and the Office of Nuclear Physics under grants DE-FG02-96ER40965 (M.E.) and DE-SC0011090 (J.N.).

PY - 2014

Y1 - 2014

N2 - We report initial nucleon structure results computed on lattices with 2+1 dynamical Möbius domain wall fermions at the physical point generated by the RBC and UKQCD collaborations. At this stage, we evaluate only connected quark contributions. In particular, we discuss the nucleon vector and axial-vector form factors, nucleon axial charge and the isovector quark momentum fraction. From currently available statistics, we estimate the stochastic accuracy of the determination of gA and (x)u-d to be around 10%, and we expect to reduce that to 5% within the next year. To reduce the computational cost of our calculations, we extensively use acceleration techniques such as low-eigenmode deflation and all-mode-averaging (AMA). We present a method for choosing optimal AMA parameters.

AB - We report initial nucleon structure results computed on lattices with 2+1 dynamical Möbius domain wall fermions at the physical point generated by the RBC and UKQCD collaborations. At this stage, we evaluate only connected quark contributions. In particular, we discuss the nucleon vector and axial-vector form factors, nucleon axial charge and the isovector quark momentum fraction. From currently available statistics, we estimate the stochastic accuracy of the determination of gA and (x)u-d to be around 10%, and we expect to reduce that to 5% within the next year. To reduce the computational cost of our calculations, we extensively use acceleration techniques such as low-eigenmode deflation and all-mode-averaging (AMA). We present a method for choosing optimal AMA parameters.

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M3 - Conference article

AN - SCOPUS:85030093968

VL - Part F130500

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

M1 - 134

T2 - 32nd International Symposium on Lattice Field Theory, LATTICE 2014

Y2 - 23 June 2014 through 28 June 2014

ER -