Chapter 2 Flashcards
What are quarks?
Baryons and mesons aren’t fundamental particles, they are made up of smaller particles, quarks
What force do quarks feel?
Strong
What interactions do quarks undergo?
Strong and weak
Are quarks fundamental particles?
Yes
How many quarks are found in an area?
2 or 3. Never found in isolation
What are hadrons made up of?
Quarks
What is the quark combination for a proton, charge and baryon number?
uud, +1, 1
What quarks are baryons made up of?
3 quarks, q q q
What is the quark combination for a neutron, charge and baryon number?
udd, 0, 1
Symbol, relative mass, charge, baryon number and strangeness for up quark
Sym = u Mass = 1 Charge = +2/3 B = +1/3 S = 0
Symbol, relative mass, charge, baryon number and strangeness for down
Sym = d Mass = 2 Charge = -1/3 B = +1/3 S = 0
Symbol, relative mass, charge, baryon number and strangeness for strange
Sym = s Mass = 1 Charge = -1/3 B = +1/3 S = -1
What are charged pions made up of?
Quark anti quark pair
What is the baryon number for all pions?
0
What is the charge for pion+, pion-, pion ^0
pion+ = 1 pion- = -1 pion^0 = 0
What quarks make up pions?
pion+ = u anti d pion- = anti u d pion^0 = u anti u, d anti d, s anti s
What happens when a quark undergoes strong interaction?
Number and types of quarks are conserved
What happens when a quark undergoes weak interaction?
Number and types of quarks can change, individual quarks can change from 1 type to another
