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SUMMARY:Stable gravity based on Ricci\, Gauss-Bonnet\, Weyl scalars for co
 smology and astrophysics
DTSTART;VALUE=DATE-TIME:20261029T141000Z
DTEND;VALUE=DATE-TIME:20261029T142500Z
DTSTAMP;VALUE=DATE-TIME:20261104T161050Z
UID:indico-contribution-6259@cern.ch
DESCRIPTION:Speakers: Yury Pokrovsky (National Research Center “Kurchato
 v Institute”\, Moscow\, 123182\, Russia)\nRicci–Gauss–Bonnet–Weyl 
 (RGW) gravity\, based on a pure geometric Lagrangian defined by a specific
  combination of the Ricci (R)\, Gauss–Bonnet (G)\, and Weyl (W) scalars\
 , is proposed and discussed as a potentially viable generalization of Gene
 ral Relativity (GR) for cosmology\, astrophysics\, and the Solar System. I
 n this RGW gravity\, there are no ghosts or unstable perturbations. Within
  the Parameterized Post-Newtonian (PPN) formalism\, it is shown that RGW g
 ravity has the same PPN parameter values as GR. Without the need for a cos
 mological constant or dark matter\, this RGW gravity agrees well with Sola
 r System data\, cosmological data\, and the latest data for the scalar spe
 ctral index and tensor-to-scalar ratio determined by the evolution of rand
 om metric fluctuations during the inflationary stage of the primordial Uni
 verse. The physics of the gravitational field arising from RGW gravity is 
 considered in the contexts of all cosmological stages\, black holes\, supe
 rnovae\, neutron stars\, compact binary systems\, galaxy rotation curves\,
  and weak-field gravity. Finally\, RGW gravity is discussed in the context
  of predictions for possible new experiments.\n\nhttps://indico.particle.m
 ephi.ru/event/626/contributions/6259/
LOCATION: Conference Hall 5
URL:https://indico.particle.mephi.ru/event/626/contributions/6259/
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