Particle Physiscs Flashcards
(11 cards)
What are leptons
Fundamental particles ( not made of any other particles )
What are mesons
Particles made an antiquark and quark pair
What is a baryon
Made of three quarks
How would you express an anti particle
Line above letter
What must be conserved in particle interactions
Charge
Momentum
Why do anti helium nuclei only survive for a fraction of a second
They meet matter and annihilate
What type of quarks make up a an anti neutron
Anti quarks
What is a the role of a magnetic field in a particle detector
To provide a centripetal force so momentum can be investigated
How can you tell the direction of a magnetic field in a particle detector
Felmings left hand rule
Point thumb towards centre of motion
Point middle finger in direction of current ( if negative charged particle, goes left to right)
( if positive right to left )
Why is it difficult to contain anti hydrogen atoms compared with anti protons
Atoms are not charged so electric fields have no effect
Why has little anti matter been created
A lot of energy needed to make animatter
