Physics A-Level
Quark and anti-quark composition
What Quark and anti-quark composition means in Physics A-Level, as defined for OCR.
Definition of Quark and anti-quark composition
Check what you remember
Read the wording for your board, then hide it and explain Quark and anti-quark composition in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Baryons contain three quarks (qqq), while mesons contain a quark and an anti-quark (qq̄), using up (u), down (d) and strange (s) quarks and their respective anti-quarks.
Topics that use Quark and anti-quark composition
- Fundamental particles (OCR A-Level)
Related terms
- Anti-quark charge reversal
- Baryon number and strangeness
- Baryons
- Charge from quark content
- Conservation of charge
- Conservation of lepton number
- Equation balancing as a validity test
- Fractional quark charge
Using Quark and anti-quark composition in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Physics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Physics A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge