On Friday, February 22, 2019 at 8:13:21 PM UTC-7, Brent wrote: > > > > On 2/22/2019 6:04 PM, [email protected] <javascript:> wrote: > > > > On Friday, February 22, 2019 at 4:55:41 PM UTC-7, Brent wrote: >> >> >> >> On 2/22/2019 2:40 PM, [email protected] wrote: >> >> Gravitons, as quanta of the metric field, are already relativistic >>> particles and covariant. >>> >> >> *I thought it's the equations of motion for the particular force, not the >> mediating particles, that must be covariant. On a related topic for this >> thread, where does GR depart from Mach's principle? That is, what did >> Einstein implicitly (or explicitly) deny about Mach's principle? TIA, AG * >> >> >> Einstein thought he would develop a theory that satisfied Mach's >> principle, but as it turned out GR doesn't. For example the metric of >> spacetime is a dynamic field and transmit momentum and energy, as shown by >> LIGO. Mach's idea of spacetime as purely a relation between material >> events couldn't do that. >> >> Brent >> > > *Were you inferring covariance simply because the mediating particle for > gravity, the graviton, travels at the SoL? * > > > GR is a covariant theory. So it's quanta, gravitons, are covariant. >
*I could be mistaken, but I see gravitons as being part of a distinct theory of gravity, which might give the same results as GR. In GR, the paths are determined by geometry in the absence of forces, not by mediating particles. AG * > > *I thought it's the equations of motion for the particular force, not the > mediating particles, that must be covariant. Do we have equations of > motions for strong and weak forces, which are covariant? AG* > > > Forces are mediated by exchange of bosons. Those bosons appear in the > Standard Model Lagrangian, from which equations of motion can be derived. > > > https://en.wikipedia.org/wiki/Mathematical_formulation_of_the_Standard_Model > > Brent > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
