Recent content by headbomb

Latin opens up some more possibilities. You could probably manage something like A/E/H baryons instead ε/ζ/κ, but my personal preference is for Greek symbols. As for talking to the PDG, we planned on doing so after publication for a variety of reasons (some personal, others because of certain...

Well I'm trying to avoid snottyness, because it's not meant to be snotty. However, I won't hold back criticism of the current nomenclature, out of fear to "offend". If ideas offend you, then science shouldn't be your field. And I do recognize it's a big deal. Hence why this is a proposal, to...

Well symbols like δ and π would certainly be available in writing, but if you use say δ instead of ζ, you would sometimes say (orally) something like "the δ baryons are...". In this scheme, it would refer to all baryons made of quarks of two distinct flavours, which would be confusing with the...

* The idea with resonances would be to use the spin state (when known) rather than masses. So instead of e.g \Lambda^0, \Lambda^0(1405), \Lambda^0(1520), ... you would have \kappa'^0_{uds}(1/2^+), \kappa'^0_{uds}(1/2^-), \kappa'^0_{uds}(3/2^-), ... [if the spin-state is unknown/uncertain, you...

I'm not really sure if this is the best place to ask this, but I'm doing a master's on a new hadron nomenclature. As part of it, I'm currently writing an article on baryon names, which I'm probably going to submit it to Physical Review D after my supervisors give the thumbs up. (I'm not really...

Yes, but do you know of a book that specifically discuss these assignments of L with particular channels (instead of being a quantum number). Also, I've spoken with my teacher about this and he says that his impression is that L indeed is a quantum number. We are both quite puzzled by this...

Any book or online refs I can check on that topic? Yes, which then leads to the question, how would one write the analogous states for the equivalent \Sigma^- (dds) states? These would all be P33 states [edit:I meant P23, my bad]. Would mass be the only distinguisher?

Different internal symmetries (different wavefunctions). I just might have answered my own question.

If there is no L, then why is L given (the P in P13/P33, see http://pdg.lbl.gov/2009/reviews/rpp2009-rev-n-delta-resonances.pdf). If there is no S, then why is J not equal to L? Isospin is not fundamental. I want the fundamental difference between the N(1720) and the Delta(1920)/Delta(1600)...

I've been working on something and I seem to have hit a noose. The PDG lists many N/Delta resonances, but let's focus on four of them, each with JP=3/2+: *N(1720), P13, http://pdg.lbl.gov/2009/listings/rpp2009-list-N-1720-P13.pdf *Delta(1232), P33...

Yeah, but I also want to derive the possibilities with symmetric colour/space. Which shouldn't be too hard if I substitute quark flavour and quark colour.

Mmmm... I've reread your post (clem), and I now see that this would the be the \Delta^{++}'s S=3/2 Sz=1/2 spin config. Which is why the math checks out. I'm simply not working with a S = 1/2 config like I was under the impression. Also I now noticed that humanino made a small mistake that...

The u denotes spin projection +1/2. I didn't know the forum supported TeX at the time of my original post. I'm not quite sure you understand what my problem is. I'm applying first principles as I understand them (see the quotation from R. Shankar above), and the only thing I'm getting is a...

Thing is I don't get group theory, like at all. Which is actually the reason why I'm trying to derive these wavefunctions from first principles. I can get the two quarks spin wavefunctions correctly. From the same maths I used above (aka, build a general wavefunction with all permutations...

Yeah, but I don't get a mixed symmetry spin, I get a symmetric spin. Namely |spin> = exp(i\phi)/sqrt{3} (|uud> + |udu> + |duu>) I'm deriving this from first principles, so there's something I'm doing wrong. I'm trying to pinpoint what exactly it is I'm doing wrong.