- #1
kelly0303
- 561
- 33
Hello! I am reading Modern Particle Physics by Mark Thomson and in chapter 9.6.2 he writes the composition of certain mesons. However for some of them he uses an equality sign: $$|\rho^0> = \frac{1}{\sqrt{2}}(u\bar{u}-d\bar{d})$$ while for others he writes: $$|\omega> \approx \frac{1}{\sqrt{2}}(u\bar{u}+d\bar{d})$$ I see that on wikipedia the omega meson appears simply as $$ \frac{1}{\sqrt{2}}(u\bar{u}+d\bar{d})$$ so I was wondering what is the meaning of not using an equal sign for certain mesons' composition. Thank you!