Quark Index

For detailed calculations, it is often convenient to use a number to represent different quark classes. So any thermodynamic or chemical seed Z

$\sf{Z} \in \large{\{}$

$\sf{U, D, E, G, M, A, T, B, S, C, }$

Ⓐ,

Ⓑ,

Ⓒ,

Ⓝ,

Ⓓ,

Ⓛ

$\large{\}}$

that is used to define an ordinary quark

$\sf{z} = \{ \, \sf{Z}, \sf{O} \, \}$

and its associated anti-quark

$\bar{\sf{z}} = \{ \, \sf{Z}, \bar{\sf{O}} \, \}$

can occasionally be refered to using a number represented by the Greek letter ζ as shown in the table below. When used like this, zeta is called the quark index. This number also identifies the seed Z. The two particles $\sf{z}$ and $\bar{\sf{z}}$ are sometimes collectively called ζ-type or Z-type quarks. These notations are helpful when using summation notation in formulae.

Twenty Dragon Tampan (detail) Paminggir people. Lampung region of Sumatra 19th century, 65 x 81 cm. From the library of Darwin Sjamsudin, Jakarta. Photograph by D Dunlop.

Index	Seed	Quarks
ζ	Z	z z
1	U	u u
2	D	d d
3	E	e e
4	G	g g
5	M	m m
6	A	a a
7	T	t t
8	B	b b
9	S	s s
10	C	c c
11	Ⓐ	a a
12	Ⓑ	b b
13	Ⓒ	c c
14	Ⓝ	n n
15	Ⓓ	dd
16	Ⓛ	l l

Here is a link to the most recent version of this content, including the full text.

A Quark Index

Noun		Definition
Quark Index	$\zeta \; \; \sf{\text{is a number representing quark class. }}$	3-56