Conservation of Strangeness (outside of strong interactions)

Click For Summary

Discussion Overview

The discussion revolves around the conservation of strangeness in particle interactions, specifically examining whether strangeness conservation implies a strong interaction. Participants explore the roles of different fundamental forces, including strong, electromagnetic, and weak interactions, in relation to strangeness conservation.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • Some participants propose that strangeness is conserved only in strong interactions, raising the question of whether conservation of strangeness necessarily indicates a strong interaction.
  • Others argue that strangeness can also be conserved in electromagnetic interactions, suggesting that without additional details, one cannot determine the specific interactions involved.
  • A later reply notes that weak interactions can also conserve strangeness, highlighting that while weak interactions can violate strangeness, they do not have to, similar to other quantum numbers like charm, top, and bottom.
  • One participant clarifies their understanding of the topic, indicating that their textbook was ambiguous regarding the conditions under which strangeness is conserved.

Areas of Agreement / Disagreement

Participants express differing views on the implications of strangeness conservation, with some asserting that it is only conserved in strong interactions, while others highlight the role of electromagnetic and weak interactions. The discussion remains unresolved regarding the necessity of strong interactions for strangeness conservation.

Contextual Notes

Participants note ambiguities in textbook definitions and the complexity of interactions involving quark flavors, indicating that the discussion is contingent on specific definitions and contexts.

OJFord
Messages
29
Reaction score
0
I realize that strangeness must only be conserved in strong interactions,

but if strangeness is conserved, must it be a strong interaction?I'm an A level student so please go easy.. mention spin, colour, charm, top or bottom and I'll know not where to look.
 
Physics news on Phys.org
OJFord said:
I realize that strangeness must only be conserved in strong interactions,

but if strangeness is conserved, must it be a strong interaction?


I'm an A level student so please go easy.. mention spin, colour, charm, top or bottom and I'll know not where to look.

The electromagnetic interaction also conserves strangeness (conserves quark and lepton flavor in general), so no. Without specifying more details, we can't possibly determine which interactions are involved.

To complicate matters further, there are also weak interactions that conserve strangeness. If you know of the W and Z bosons, then interactions which involve exchange of W bosons change the flavor of quarks and leptons, while those that involve Z bosons do not.
 
Excellent, thank you.

My textbook was just ambiguously worded - I wasn't sure if strangeness was only conserved in strong interactions, or if (as is the case) it's only in strong interactions that strangeness must be conserved.

You're answer clears that up, thanks.
 
Simple example: There are many processes of the weak interaction without any strange quarks, so strangeness is 0 all the time, which means that it is conserved.

The weak interaction can violate strangeness (and all other interactions cannot), but it does not have to. The same is true for the other similar quantum numbers (charm, top, bottom - they are the same as strangeness, just for other quarks).
 

Similar threads

  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 10 ·
Replies
10
Views
5K
  • · Replies 3 ·
Replies
3
Views
5K
  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K