University Physics V · Elementary Particle Physics · 17.02
Antiparticles, charge conjugation, and CPT
Negative-energy Dirac solutions reinterpreted by Feynman-Stuckelberg as positive-energy antiparticles running forward in time, charge conjugation as psi to C ψ-bar transposed with C = i γ-2 γ-0, and CPT forcing equal masses and lifetimes.
Course-map guide · not a complete lesson or simulationScope & orientation
What this subsection covers
Negative-energy Dirac solutions reinterpreted by Feynman-Stuckelberg as positive-energy antiparticles running forward in time, charge conjugation as psi to C ψ-bar transposed with C = i γ-2 γ-0, and CPT forcing equal masses and lifetimes.A strong response uses jpc tables for flavour-neutral quark-antiquark states and states where the model stops being reliable.
Reasoning checklist
Evidence, assumptions and limits
Assumptions to state
State the system, observable, approximation, and conditions held fixed before using a model.
Evidence to collect
What mean lifetime does the delayed-coincidence time distribution support, and how much does negative-muon capture in the scintillator bias it downward?
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What mean lifetime does the delayed-coincidence time distribution support, and how much does negative-muon capture in the scintillator bias it downward? Useful evidence includes decay-time histogram, a maximum-likelihood exponential fit with an accidental background, the fitted lifetime against 2.197 microseconds, and the μ-minus capture correction that makes the raw fit a mixture of two rates.
Limits to state
This GioPhysics course map is an adaptable learning sequence, not academic credit, accreditation, or a universal university syllabus.
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This GioPhysics course map is an adaptable learning sequence, not academic credit, accreditation, or a universal university syllabus. It is written for a four-credit course of roughly three lecture hours plus two to three laboratory or computational hours a week across fifteen weeks, and it is deliberately more mathematical than University Physics I–IV: linear algebra and differential equations are working tools here, not background. Twenty units are mapped against a suggested fifteen-week delivery, so several units share a teaching week. Departments differ widely in how much formalism they expect at this stage; follow your institution's published scope, notation, laboratory programme, and assessment rules. A result should be checked against units, signs, limiting cases, and the conditions under which its model was derived.
Diagram & examples
Work the claim before choosing an equation
Interactive concept map
Follow the model from claim to evidence.
Model, evidence, and boundary
What must be stated before selecting an equation for Antiparticles, charge conjugation, and CPT?
modelModel, evidence, and boundary turns the stated idea into a representation that can make a prediction.
Example questions
Try the reasoning before revealing the structure.
What must be stated before selecting an equation for Antiparticles, charge conjugation, and CPT?
Quick check
Test the reasoning, not recall
What must be stated before selecting an equation for Antiparticles, charge conjugation, and CPT?
Choose an answer to test the model.