Undergrad Is Gravity Part Of The Standard Model?

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Gravity is not included in the Standard Model of particle physics, which focuses on three fundamental forces: electromagnetic, weak, and strong. The incompatibility arises because the Standard Model is background dependent, while classical theories of gravity are background independent. Discussions highlight that while gravity is traditionally recognized as one of the four forces, its role in particle physics is minimal and often considered negligible. Some theorists propose that gravity could be incorporated into a broader framework, such as quantum gravity or string theory, which aims to unify all forces. The consensus remains that gravity's integration into the Standard Model is an ongoing challenge in theoretical physics.
  • #31
bhobba said:
Feynman shows it is exactly the same as GR. However I just know what I read in the book, others may know more details. A book that follows a similar approach classically is Ohanian - Gravitation:
https://www.amazon.com/dp/1107012945/?tag=pfamazon01-20

Its different - but equivalent - to the usual and perhaps more elegant geometric approach as is shown in the book.

Thanks
Bill
It has been a while, but from what I recall this equivalency certainly wasn't true at the level of rigour of mathematical physics instead of at the level of rigour of theoretical physics, where it is of course generally accepted as being true.

Myself, I'd wager on the geometric interpretation being more correct with the field theoretic interpretation being merely an approximation: this wager is based purely on mathematical intuition, biased by more sophisticated geometric and (complex-)analytic aesthetics.
 
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