Media type: Text; E-Article Title: Constraining spacetime nonmetricity with Lorentz-violation methods Contributor: Xiao, Zhi [Author]; Lehnert, Ralf [Author]; Snow, W.M. [Author]; Xu, Rui [Author] Published: Bristol : Institute of Physics Publishing, 2018 Published in: International Workshop on CPT and Lorentz Symmetry in Field Theory 2017, July 6-7, 2017, Faro, Portugal ; Journal of Physics: Conference Series 952 (2018), Nr. 1 Issue: published Version Language: English DOI: https://doi.org/10.15488/3318; https://doi.org/10.1088/1742-6596/952/1/012014 ISSN: 1742-6588 Keywords: Riemannian manifold ; Konferenzschrift ; Physics ; Slow neutrons ; Nonmetricity ; Spacetime ; Effective field theory ; Lorentz violations ; Experimental techniques ; Geometric objects Origination: Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen. Description: In this report, we will give the first constraints on in-matter nonmetricity. We will show how the effective-field-theory (EFT) toolbox developed for the study of Lorentz violation (LV) can be employed for investigations of the "effective LV" background caused by nonmetricity, a geometric object extending the notion of a Riemannian manifold. The idea is to probe for the effects of spacetime nonmetricity sourced by liquid 4He with polarized slow neutrons. We present the first constraints on isotropic and parity-odd nonmetricity components. Further constraints on anisotropic nonmetricity components within this EFT framework may be feasible with proper experimental techniques in the near future. © Published under licence by IOP Publishing Ltd. Access State: Open Access Rights information: Attribution (CC BY)