S parameter and parity doubling below the conformal window

David Schaich

doi:10.22323/1.139.0087

S parameter and parity doubling below the conformal window

High Energy Physics - Lattice 2022-09-21 v2 High Energy Physics - Phenomenology

Authors: David Schaich

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Abstract

Recently the Lattice Strong Dynamics Collaboration reported a reduction of the electroweak S parameter for SU(3) gauge theory with Nf=6 fermions in the fundamental representation, compared to scaled-up QCD (arXiv:1009.5967). Here I provide additional details of our calculation. I discuss our use of conserved lattice currents; the relation to vector--axial parity doubling; finite-volume effects; and the sensitivity of our results to the number of fermion doublets with chiral electroweak couplings. Results presented here include additional data, and do not affect our previously-published conclusions.

Keywords

gauge theories and chiral symmetry lattice gauge theory with chiral fermions lattice gauge theory

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@article{arxiv.1111.4993,
  title  = {S parameter and parity doubling below the conformal window},
  author = {David Schaich},
  journal= {arXiv preprint arXiv:1111.4993},
  year   = {2022}
}

Comments

Contribution to the proceedings of Lattice 2011, July 10-16, Lake Tahoe, California. 7 pages. v2: Eqn. 4.2 corrected, conclusions unchanged

S parameter and parity doubling below the conformal window

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