GBAR Experiment (CERN) - Genève

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Discussion Overview

The discussion centers around the GBAR experiment at CERN, which aims to investigate the behavior of antimatter in a gravitational field. Participants explore the implications of potential results that could show antimatter behaving differently from matter, particularly in relation to General Relativity and black hole physics.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants express a belief that antimatter should behave similarly to matter in a gravitational field, in line with the principle of equivalence in General Relativity.
  • Others suggest that if the GBAR experiment shows antimatter "falling upwards," it would necessitate a revision of gravitational interaction theories, potentially leading to new models of black holes.
  • One participant argues that the current understanding of black holes as vacuum solutions would not require revision based on new findings about antimatter.
  • Concerns are raised about the assumptions underlying the discussion, particularly regarding the implications of antimatter escaping black holes and the nature of gravity in General Relativity.
  • Some participants question the validity of claiming that distant galaxies consist solely of matter, highlighting the uncertainty in current astronomical observations.
  • There is a debate about whether antimatter could be "pushed back" by a black hole, with some arguing that this would not change the requirement of exceeding the speed of light to escape a black hole's gravitational pull.

Areas of Agreement / Disagreement

Participants do not reach a consensus, as there are multiple competing views regarding the implications of the GBAR experiment's potential findings on General Relativity and black hole physics. The discussion remains unresolved with ongoing debate about the nature of gravity and the behavior of antimatter.

Contextual Notes

Participants highlight the limitations of current understanding, including the reliance on assumptions about gravity and the behavior of antimatter. There is also mention of the need to reconcile any new findings with existing experimental results and theories.

  • #31
hmmm27 said:
Is there a PF link explaining the "basic, medium, advanced" parameter of a post ? I originally thought it referred to the question, not the questor (which makes much more sense, if you think about it, of course).
https://www.physicsforums.com/threads/new-thread-level-prefixes-b-i-a.824360/
https://www.physicsforums.com/threads/filters-in-forums-b-i-a.824739/
https://www.physicsforums.com/threads/whats-the-deal-with-the-forced-prefix.827372/
 
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  • #32
Thank you to you @PeterDonis, for your precise and consistent answer !

@Vanadium 50 : Next time, express yourself more clearly and less evasively .
I have nothing more to tell you.

Have a good day,
Marilyn
 

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