Talk:Minimal Supersymmetric Standard Model
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Should superpartner link to sparticle? My own knowledge here is minimal, but it seems to be appropriate... Isomorphic 05:42, 20 Apr 2004 (UTC)
I've had some problems editing this page - in the right hand symbol column, i couldn't work out how to put a tilda above greek letters - nu, mu, tau and gamma, so i've either written in the romanised form of the letter with a tilda above, or used T and v in the case of tau and nu. If anyone could sort this out, that would be very helpful. In the higgs and higgsino column, the H^+/- should have a proper plusminus symbol instead of the +/-, but i couldn't work out how to do this either.
[edit] Nonanalytic (soft) SUSY breaking terms
Disputed paragraph:
*The following couplings are often neglected (that is, set to zero) because most realistic SUSY breaking models (but not all)
only induce tiny couplings. They are mentioned in this article for completeness.
<math>\mathcal{L} \supset C h_d^* q u^c + C h_u^* q d^c + C h_u^* l e^c + h.c.</math>
where the lowercase field names are the scalars of a given supermultiplet. The <math>C</math> terms are <math>3 \times 3</math> complex matrices.
These nonanalytic SUSY breaking terms will only fail to be soft (i.e. stabilize the Higgs mass from quadratically divergent radiative corrections) if we have a a chiral multiplet in addition to MSSM which is neutral under the Standard Model gauge group, but then, this means that we are no longer working with MSSM but NMSSM. In the MSSM itself (as opposed to NMSSM) the previous terms are indeed soft. QFT 22:55, 11 February 2006 (UTC)
- The C-terms are generally not included because in no (non-contrived) susy breaking scenario does one generate (any significant) non-holomorphic tri-linears. Also depending on the susy breaking sector, they can reintroduce quadratic divergences. They also exacerbate flavour and CP problems (24 flavour violating parameters, 27 phases). I personally feel this is safely outside the realm of
wikipedia. -- jay 23:05, 11 February 2006 (UTC)
- Also, to be consistent with the notation in the article, there should be tilde's over the superpartners, ie q is a quark doublet and
is a squark doublet. -- jay 23:09, 11 February 2006 (UTC)
[edit] Awkward Sentence
"There are theoretical reasons to believe that the superparticles will be discovered by the 2010." makes me think that the theory says the universe will somehow change by 2010, revealing supersymmetric particles. I suppose this is not correct. Perhaps the author was referring to the LHC?
- I think you're right. It also assumes (indirectly) that it will be easy to tell superparticles from, say, Kaluza-Klein excited states, which it won't. I rewrote the sentence. -- SCZenz 17:47, 6 April 2006 (UTC)
