Proton decay [was: Are atoms 'perpetual machines'?]

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Discussion Overview

The discussion centers around the concept of proton decay, exploring whether protons decay and the implications of such decay. Participants examine theoretical perspectives on proton stability and decay processes, including potential decay products.

Discussion Character

  • Debate/contested, Theoretical exploration

Main Points Raised

  • Some participants assert that all atoms decay, questioning the stability of protons.
  • Others note that proton decay has never been observed, presenting two main theories: one that protons do not decay and another suggesting they decay with an extremely long half-life.
  • A question is raised about the products of proton decay, specifically what a proton would decay into if it were to decay.
  • One theory is mentioned that proposes a proton could decay into a positron and a neutral pion, which subsequently decays into two gamma ray photons, although the accuracy of this information is uncertain.

Areas of Agreement / Disagreement

Participants do not reach a consensus on whether protons decay, with multiple competing views presented regarding their stability and decay processes.

Contextual Notes

Limitations include the lack of observational evidence for proton decay and the dependence on theoretical models that may vary in their assumptions and interpretations.

ice109
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don't all atoms decay? don't even protons decay?
 
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To my knowledge, a proton decay has never been observed, and the two theories are either "They do not decay" or "They decay, but have a very long half-life".

V
 


If protons are to decay, what do they decay to?
 


One theory suggests that a proton, if it decays at all, decays into a positron and a neutral pion that itself then decays into 2 gamma ray photons. And apparently, other decay scenarios are possible. I read that in WiKi, but not sure how accurate I translated.

http://en.wikipedia.org/wiki/Proton_decay
 

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