The Particle Zoo

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This is a listing of the basic particles that we find in the Standard Model. The anti-quarks are indicated by overbars, except for the antimatter versions of the charmed and bottom quarks, which I have had to indicate with underlines.

particle

mass (Mev)

quark content

spin

electric charge

isospin

The Quarks

Down

350

d

1/2

-1/3

1/2

Up

350

u

1/2

2/3

1/2

Strange

500

s

1/2

-1/3

0

Charmed

1500

c

1/2

2/3

0

Bottom

4500

b

1/2

-1/3

0

Top

173,000

t

1/2

2/3

0

The Baryons

p

938.280

uud

1/2

+1

1/2

n

939.573

udd

1/2

0

1/2

Λ

1115.6

uds

1/2

0

0

Σ+

1189.4

uus

1/2

+1

1

Σ0

1192.5

uds

1/2

0

1

Σ-

1197.3

dds

1/2

-1

1

Ξ0

1314.9

uss

1/2

0

1/2

Ξ-

1321.3

dss

1/2

-1

1/2

Λc+

2281

udc

1/2

+1

0

Δ

1232

uuu

3/2

+2

3/2

Δ

1232

uud

3/2

+1

3/2

Δ

1232

udd

3/2

0

3/2

Δ

1232

ddd

3/2

-1

3/2

Σ*

1385

uus

3/2

+1

1

Σ*

1385

uds

3/2

0

1

Σ*

1385

dds

3/2

-1

1

Ξ*

1533

uss

3/2

0

1/2

Ξ*

1533

dss

3/2

-1

1/2

Ω-

1672

sss

3/2

-1

0

Λb0

5620

udb

1/2

0

0

Pseudoscalar Mesons

π+

139.569

u

0

+1

1

π-

139.569

d

0

-1

1

π0

134.964

u -d

0

0

1

K+

493.67

u

0

+1

1/2

K-

493.67

s

0

-1

1/2

K0

497.72

d

0

0

1/2

η

548.8

u +d-2s

0

0

0

η

957.6

u +d+s

0

0

0

D+

1869

c

0

+1

1/2

D-

1869

dc

0

-1

1/2

D0

1865

c

0

0

1/2

Ds+

1971

c

0

+1

0

Ds-

1971

sc

0

-1

0

B+

5271

ub

0

+1

1/2

B-

5271

b

0

-1

1/2

B0

5275

db

0

0

1/2

ηc

2981

cc

0

0

0

Vector Mesons

ρ

770

u

1

+1

1

ρ

770

d

1

-1

1

ρ

770

u -d

1

0

1

K*

892

u

1

+1

1/2

K*

892

s

1

-1

1/2

K*

892

d, s

1

0

1/2

ω

783

u +d

1

0

0

ϕ

1020

s

1

0

0

J/ψ

3097

cc

1

0

0

D*

2010

c

1

+1

1/2

D*

2010

dc

1

-1

1/2

D*

2010

c , uc

1

0

1/2

Υ

9460

bb

1

0

0

 

eabf

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