Basic Particles & Properties

Question 1

leptons known as…

Answer 1

“light-weight”

Question 2

mesons known as…

Answer 2

“middle-weight”

Question 3

baryons known as…

Answer 3

“heavy-weight”

Question 4

The existence of anti-particles first hinted at by…

Answer 4

…Dirac’s equation describing free electrons with energy given by relativistic formula;

E^2-p^2c^2 = m^2c^4

this formula yields corresponding positive and negative energy solutions.

Question 5

Spin 1/2 Particles

Answer 5

Leptons
Quarks
Baryons

Question 6

Spin 1 Particles

Answer 6

1) Mediators:

 Strong--> gluons
 EM--> photons
 Weak --> W(+/-) and Z(0)

2) Vector Mesons

Question 7

Spin 3/2 Particles

Answer 7

Heavy Baryons

Question 8

First Generation Leptons

Answer 8

electron (-1 charge)

electron neutrino (charge neutral)

Question 9

Second Generation Leptons

Answer 9

muon (-1 charge)

muon neutrino (charge neutral)

Question 10

Third Generation Leptons

Answer 10

tau (-1 charge)

tau neutrino (charge neutral)

Question 11

First Generation Quarks

Answer 11

down flavor (-1/3 charge)

up flavor (2/3 charge)

Question 12

Second Generation Quarks

Answer 12

strange flavor (-1/3 charge)

charm flavor (2/3 charge)

Question 13

Third Generation Quarks

Answer 13

bottom flavor (-1/3 charge)

top flavor (2/3 charge)

Question 14

Spin 0 Particles

Answer 14

Pseudoscalar Mesons

Question 15

Proton Quark Content & Charge

Answer 15

uud

+1 charge

Question 16

Neutron Quark Content & Charge

Answer 16

udd

charge neutral

Question 17

Lambda Baryon Quark Content & Charge

Answer 17

uds

charge neutral

Question 18

Sigma(+) Baryon Quark Content and Charge

Answer 18

uus

+1 charge

Question 19

Sigma(0) Baryon Quark Content & Charge

Answer 19

uds

charge neutral

Question 20

Sigma (-) Baryon Quark Content & Charge

Answer 20

dds

-1 charge

Question 21

Xi(0) Baryon Quark Content & Charge

Answer 21

uss

charge neutral

Question 22

Xi(-) Quark Content & Charge

Answer 22

dss

-1 charge

Question 23

Lambda_c (+) Baryon Quark Content & Charge

Answer 23

udc

+1 charge

Question 24

Delta Baryon Quark Content & Charge

Answer 24

uuu +2 charge

uud +1 charge

udd neutral charge

ddd -1 charge

Question 25

Sigma(*) Baryon Quark Content & Charge

Answer 25

uus +1 charge

uds charge neutral

dds -1 charge

Question 26

Xi(*) Baryon Quark Content & Charge

Answer 26

uss charge neutral

dss -1 charge

Question 27

Omega(-) Baryon Quark Content and Charge

Answer 27

sss

-1 charge