Mass: Uniting Quarks & Antimatter in Unexpected Ways

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Homework Help Overview

The discussion revolves around the behavior of mass in the context of quarks and antimatter, particularly focusing on the assertion that mass behaves oppositely to other quantum numbers. Participants are exploring the implications of this claim and questioning the clarity of the original post.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the meaning of "opposite" in relation to mass and its classification as a quantum number. There is a discussion about how mass adds together rather than cancels out when considering matter and antimatter. Some participants provide reasoning related to the nature of mass and energy.

Discussion Status

The discussion is active, with participants providing insights into the nature of mass and its relationship with energy. There are multiple interpretations being explored, particularly regarding the classification of mass and the implications of anti-particles having positive mass. Some participants express uncertainty about whether the original question fits within the homework context.

Contextual Notes

There is a note of concern regarding the appropriateness of the question for the homework forum, as some participants suggest that the original poster may be working on their own model of particles, which could be outside the intended scope of the forum.

talanum52
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Homework Statement
Why does mass behave differently?
Relevant Equations
N/A
Mass behaves opposite that of other quantum numbers when combining matter (quarks) and antimatter. Why?
 
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Is this really a homework question? In any case, the question is not clear.

What does "opposite" mean here? And mass is not a quantum number...
 
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DrClaude said:
Is this really a homework question? In any case, the question is not clear.

What does "opposite" mean here? And mass is not a quantum number...
It adds together, rather than cancel.
 
talanum52 said:
It adds together, rather than cancel.
Anti-particles have positive mass, not negative mass.
 
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jbriggs444 said:
Anti-particles have positive mass, not negative mass.
Why?
 
talanum52 said:
Why?
Because "mass" is the magnitude of the energy-momentum four-vector which is always positive.

In simpler but almost completely equivalent terms, because ##E=mc^2## (in a particle's rest frame) and energy is always positive.

And because the notion of particles that speed up when you apply a retarding force is not very sensible.

And because experiment shows that they have positive mass.
 
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O.K. Thank you.
 
DrClaude said:
Is this really a homework question?
No, the OP has the recent days posted several of their questions in the HW forum which actually belongs in the technical forums (some threads got deleted because of OP is working on their own model of particles.)
 
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