Recent content by RobyVonRintein

I'm looking at Jackson v3 eqns. 14.26-14.28 (hopefully you have a copy), they derive the formula as in the PDF as being dependent on the acceleration, then write acceleration as dp/dt, then write dp/dt as dE/dx, which they interpret as being entirely from the external field. In other words, the...

To phrase the question a different way, consider 4 x 4 = 10_S + 6_A. Now if we consider the SU(3) subgroup, we have: (3 + 1) * (3 + 1) = 3 * 3 + 3 * 1 + 1 * 3 + 1 * 1 Now clearly 1 * 1 = 1 and 3 * 3 = 6 + 3_A. So we have: 10 + 6_A = 6 + 3_A + 1 +3 * 1 + 1 * 3. which...

To phrase the question a different way, consider 4 x 4 = 10_S + 6_A. Now if we consider the SU(3) subgroup, we have: (3 + 1) * (3 + 1) = 3 * 3 + 3 * 1 + 1 * 3 + 1 * 1 Now clearly 1 * 1 = 1 and 3 * 3 = 6 + 3_A. So we have: 10 + 6_A = 6 + 3_A + 1 +3 * 1 + 1 * 3. which gives: 3 + 3_A...

For (a), I agree, I think it's that simple. For (b), the Larmor formula does not apply because this is so relativistic (gamma = 20!). You will have to use the relativistic formula; see section 8.2 here: http://physics.usask.ca/~hirose/p812/notes/Ch8.pdf Note that getting acceleration from...

You mean just that the lines appear to be spiraling clockwise vs. counter-clockwise? That makes no difference, it's just stylistic. I see no difference between these two diagrams. I would draw the dd quarks off to the side to avoid having the lines overlapping like this, just better...

Good call. To clarify for the OP: if you had s and sbar crashing into one another (as at a collider), then you could get ss --> cc, because the relative kinetic energy between them would make up for the smaller mass energy. But in this case you have s and sbar bound together, so there is a...

How is this going to go? Strong processes always dominate, and we can imagine a lot of strong processes here; ss --> cc for example, mediated by a gluon. Getting an EM process like this to go is going to be at least 1/1000 times smaller. So that's the branching ratio (very roughly). The full...

Homework Statement (a) For SU(N), we have: N ⊗ N = A_A + S_S where A corresponds to a field with two antisymetric fundamental SU(N) in- dices φij = −φji, and S corresponds to a field with two symmetric fundamental SU(N) indices φij = φji. By considering an SU(2) subgroup of SU(N), compute...