Coalescence between a neutron and a K+ meson

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Discussion Overview

The discussion revolves around the coalescence between a neutron and a K+ meson, exploring the formation and decay of a pentaquark particle into these components. Participants examine the quark content and potential formation mechanisms, as well as the stability and half-life of the pentaquark.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Some participants propose that the interaction is simply the coalescence of a neutron and a K+ meson.
  • One participant notes that the quark content of the pentaquark (uudds) aligns with that of a neutron and a K+ meson, though the formation process remains unclear.
  • Another participant mentions that the pentaquark may be formed when gamma rays interact with heavy hydrogen nuclei, but details on the subsequent processes are uncertain.
  • There is a suggestion that the pentaquark is unstable, as it decays into a neutron and a K+ meson.
  • A participant recalls that the half-life of the pentaquark is thought to be around 10^-20 seconds, indicating a very short lifespan for this particle.

Areas of Agreement / Disagreement

Participants generally agree on the coalescence aspect and the quark content, but there is no consensus on the formation mechanism or the specifics of the pentaquark's stability and half-life.

Contextual Notes

Unresolved aspects include the exact formation process of the pentaquark and the implications of its short half-life, which may depend on further experimental evidence.

PRodQuanta
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I think it is simply the coalescence between a neutron and a K+ meson. What are your thoughts?
 
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sounds logical
 
Looking at it's quark content (uudds) it's obvious it has the same quark content as a neutron and a K+ indeed those are the two particles it decays into, I'm not sure how it's formed though.
 
I have read that it is formed when gamma rays are directed at a heavy hydrogen nuclei and what happens next is beyond me
 
It is merely the coalescence of the neutron and the K+ meson. I believe that is what the original article on this read awhile ago.
 
So if the pentaquark particle decays into a neutron and a K+ meson then it is unstable. Would anyone happen to know its half life?
 
So if the pentaquark particle decays into a neutron and a K+ meson then it is unstable. Would anyone happen to know its half life?
 
IIRC it's thought to be about 10-20 which is pretty short even for an elementary particle.
 

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