Across
- 3. a fundamental fermion with a charge of 1/3
- 5. has 2 strange quarks
- 7. as yet undiscovered exchange particle
- 9. has lepton number -1
- 13. has a charge of +1
- 14. a quark antiquark pair
- 16. a =stream of photons
- 17. is a product of beta decay
- 18. has a charge of -1
- 20. has three strange quarks
- 22. responsible for the electromagnetic interaction
- 23. any of a number of exchange particles
- 24. has one anti strange quark
Down
- 1. involved in the creation of a neutron from a proton
- 2. has three quarks
- 4. particle responsible for mass
- 6. a fundamental particle
- 8. has two anti up and an anti down quarks
- 10. "little one"
- 11. cannot be detected
- 12. principle which explains why quarks cannot be isolated
- 15. has an up and two down quarks
- 19. a massive lepton
- 21. carries the colour force
- 22. has one up and one anti down quark