1.4 Particles - Hadrons

Question 1

Hadrons:

Answer 1

Subatomic particles which take part in the strong interaction
They are NOT fundamental particles
Further subdivided into baryons and mesons

Question 2

Baryons:

Answer 2

Subatomic particles which are a type of hadron

Question 3

Number of quarks in a baryon:

Answer 3

3

Question 4

Baryon examples:

Answer 4

neutrons and protons

Question 5

Baryon number of quarks:

Answer 5

u: +1/3
d: +1/3
s: +1/3
(opposite charge for antiquarks)

Question 6

Relative charge of quarks:

Answer 6

u: +2/3 e
d: -1/3 e
s: -1/3 e

Question 7

Strangeness of quarks:

Answer 7

u: 0
d: 0
s: -1

Question 8

Quark composition of proton:

Answer 8

uud

Question 9

Quark composition of neutron:

Answer 9

udd

Question 10

The most stable baryon:

Answer 10

The proton - all baryons including neutrons will decay into protons

Question 11

Mesons:

Answer 11

Subatomic particles which are a type of hadron

Question 12

Quark composition of meson:

Answer 12

a quark and an antiquark

Question 13

Subdivisions of mesons:

Answer 13

Pions and kaons

Question 14

Pions:

Answer 14

Composed of only up and down quarks and their antiparticles

Question 15

Kaons:

Answer 15

Contain one strange or anti strange quark

Question 16

π+ charge and quark composition:

Answer 16

+1 charge
ud^-

Question 17

π- charge and quark composition:

Answer 17

-1 charge
dū

Question 18

π0 charge and quark composition:

Answer 18

0 charge
uū / dd^-

Question 19

K+ charge and quark composition:

Answer 19

+1 charge
us^-

Question 20

K- charge and quark composition:

Answer 20

-1 charge
sū

Question 21

K0 charge and quark composition:

Answer 21

0 charge
ds^- / sd^-