Experimental Predictions from String Theories

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Discussion Overview

The discussion centers around the experimental predictions that arise from string theories, focusing on what could potentially be confirmed or disproven through experimentation. The scope includes theoretical implications, potential experimental setups, and the challenges associated with testing these predictions.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Some participants suggest measuring graviton scattering amplitudes as a specific prediction from string theories, which could reveal an infinite sequence of resonances at energies beyond the Planck scale, contingent on the existence of a sufficiently large collider.
  • Others argue that if the requirement of "in principle" is dropped, there is uncertainty regarding whether any experimental predictions can be confirmed within a human lifetime.
  • One participant asserts that no theory can be unambiguously confirmed, highlighting the possibility of future measurements that could disprove existing theories.
  • The holographic principle is mentioned as having seen relative success, with a reference to a question posed by Jeff Harvey that may relate to condensed matter applications of string theory.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility and certainty of confirming predictions from string theories, indicating that multiple competing perspectives remain without a consensus.

Contextual Notes

The discussion reflects limitations in the current understanding of experimental setups capable of testing string theory predictions, as well as the dependence on future technological advancements and theoretical developments.

Who May Find This Useful

Researchers and enthusiasts in theoretical physics, particularly those interested in string theory and its experimental implications, may find this discussion relevant.

ApplePion
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Can someone give me some specific experimental predictions that come from string theories--things that at least in principle could experimentally unambiguously be confirmed or disproven?

Thanks.
 
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ApplePion said:
Can someone give me some specific experimental predictions that come from string theories--things that at least in principle could experimentally unambiguously be confirmed or disproven?

Thanks.

Since you said "in principle", it's easy. Just measure graviton scattering amplitudes and compare with string theory. You should see an infinite sequence of resonances at beyond Planck energies, due to an infinite number of massive particles in string theory. This task is easily done with a trans-Planck energy collider of galactic size.

If you drop "in principle", then no one knows whether there will be any in our lifetime.
 
No theory can be unambiguously confirmed. There's always the potential that some future measurement may disprove it.
 

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