Axial vector form factors in Ds to phi semileptonic decays from lattice QCD

Gordon Donald; Christine Davies; Jonna Koponen

Axial vector form factors in Ds to phi semileptonic decays from lattice QCD

High Energy Physics - Lattice 2011-11-02 v1

Authors: Gordon Donald , Christine Davies , Jonna Koponen

Abstract

We calculate axial vector and vector form factors for the semileptonic decay Ds to phi using HISQ valence quarks on MILC ensembles with 2+1 flavours of asqtad sea quarks. Using twisted boundary conditions to tune the quarks' momenta, we compute form factors at q^2 = 0 on coarse lattices. We find V(0)=0.903(67), A_1(0)= 0.603(20), A_2(0)=0.401(80) and A_0(0)=0.686(17), which we compare to experimental data and previous quenched lattice QCD calculations.

Keywords

axial vector form factors semileptonic decay lattice QCD HISQ valence quarks twisted boundary conditions Ds to phi decay

Cite

@article{arxiv.1111.0254,
  title  = {Axial vector form factors in Ds to phi semileptonic decays from lattice QCD},
  author = {Gordon Donald and Christine Davies and Jonna Koponen},
  journal= {arXiv preprint arXiv:1111.0254},
  year   = {2011}
}

Comments

7 pages, 3 figures.Contribution to the XXIX International Symposium on Lattice Field Theory - Lattice 2011, July 2011, Squaw Valley, Lake Tahoe, California

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