Recent content by man@SUT

Given |Psi> = a|up>+b|down>, in principle it should not be so difficult but when I calculate Delta S=Sqrt[<S^2_x,S^2_y, or S^2_z>-<S_x,S_y, or S_z>^2] the second term gives the problem. Lots of many terms a*, a, b*, b which is not canceled involve. Whoever knows the way to get rid of...

There will be the analytic solution when we assume x -> infinity or x<<1. In the case of the first few values of x giving J_m(x)=0, we might have to use the table to be the last choice. Anyway, thanks mjsd and siddharth.

I also use mathematica to solve but it doesn't help.

If we want to find x giving J_m(x)=0 where m=any constants, how can we analytically get x? Thank you

Thank you very much, Mr Hellfire. I'll try to search again from those links.

I've read an article in nature and found technical words "B mode signal" and "E mode signal". I don't understand what they are. In a website, they say it's like the electromagnetic field line but I'm still not clear. I also don't understand what k means in " the linear greyscale shows the...

What is it and how does it connect to weak interaction and electromagnetic interaction? I read from some webs, it is proposed from the isospin ladder operator. But in the book (Griffiths), he doesn't say anything about isospin ladder operator but he produces from the decay of neutron or beta...

I'm sorry that the topic had changed. I didn't ask you about the form factor but I asked you about the invariant mass amplitude or invariant amplitude that we can meet them on the way to find the cross-section, for example, the cross section of e-e+ annihilation and the cross section of...

For invariant amplitude and invariant mass amplitude, I think they are the same. We calculate them on the way to find the cross section. So, how does it relate to mass if both are the same? I am a bit confused.

Thank you for your help, Malon. regards, man@SUT

Thank you, Malon. I found this in the cross section of e-e+ to vector meson. Is there another meaning of form factor in high energy physics.

I am a new member of the forum. I don't understand the physical meaning of the form factor. Could you help me?