Does Deep Inelastic Scattering Reveal the True Nature of Baryons?

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Discussion Overview

The discussion revolves around deep inelastic scattering (DIS) and its implications for understanding baryons. Participants explore the mechanics of DIS, the nature of interactions involved, and the interpretation of results from scattering experiments.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions the interpretation of a diagram related to DIS, specifically regarding the meaning of a stream of hadrons labeled as "X" and the implications of the target being "shattered" while the original quark components remain unchanged.
  • Another participant clarifies that inelastic scattering implies that "X" can represent various final states, including the initial hadron plus additional particles, excited states, or completely different baryons, emphasizing the complexity of the outcomes in DIS.
  • The first participant expresses confusion about the relationship between high-energy electrons, small wavelengths, and probing small distances, indicating a need for further clarification on this aspect of DIS.

Areas of Agreement / Disagreement

The discussion reflects uncertainty and differing interpretations regarding the implications of DIS and the nature of the interactions involved. No consensus is reached on the specific meanings of the terms and concepts discussed.

Contextual Notes

Participants highlight potential ambiguities in definitions and interpretations of the results from DIS, particularly concerning the nature of the final states and the implications for understanding baryons.

Glenn G
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Hi,
There's a pic on wiki page (Feynman type) showing deep inelastic scattering where a fast lepton interacts with a quark in a baryon by a virtual photon (clearly that doesn't change particle type) then there's an arrow labelled X that I guess is maybe a stream of other hadrons (mesons mostly I guess provided conservation laws hold). It then goes on to talk about the target being shattered by the interaction ? I can't see what is meant by this if the original quark components of the target remain the same?

I get the idea that DES is a step up from Rutherford in that it got to penetrate the nucleus and that it apparently from analysing the angles made it clear that there were 3 charge centres in the baryon. But it then goes to talk about high energy electron means small wavelength and using that line of argument to discuss being able to probe small distances ... now I don't get why that argument tallies with what it said in the rest of the discussion ( I have read about de Broglie in connection with electron diffraction that I'm now happy with)

Any help graciously received.
G.
 
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Glenn G said:
Hi,
There's a pic on wiki page
Which page?
 
IMG_1390.JPG
 
If it is inelastic, X is not the initial hadron (alone) by definition. It can be the initial hadron plus something else (mesons dominate, but baryon/antibaryon pairs are also possible), it can be an excited state of the baryon, but it can also be a completely different baryon (always with the option to have additional hadrons). All those things are summarized as DIS, so "X" is used to show that we don't look at a specific final state here.
 
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