English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We introduce an extension of the Standard Model and General Relativity builtupon the principle of local conformal invariance, which represents ageneralization of a previous work by Bars, Steinhardt and Turok. This isnaturally realized by adopting as a geometric framework a particular class ofnon-Riemannian geometries, first studied by Weyl. The gravitational sector isenriched by a scalar and a vector field. The latter has a geometric origin andrepresents the novel feature of our approach. We argue that physical scalescould emerge from a theory with no dimensionful parameters, as a result of thespontaneous breakdown of conformal and electroweak symmetries. We study thedynamics of matter fields in this modified gravity theory and show that testparticles follow geodesics of the Levi-Civita connection, thus resolving an oldcriticism raised by Einstein against Weyl's original proposal.

Local conformal symmetry in non-Riemannian geometry and the origin of physical scales