Talk:Lightest supersymmetric particle

In most supersymmetric models, the LSP must be a neutralino (rather than a chargino) in order to have remained undetected thus far. In early versions of Supersymmetry theories the candidates for the Lightest Supersymmetric Particle were also photino and gravitino.

If the LSP is going to be dark matter, it must be electrically neutral and (almost certainly) non-colored. Generically that allows the lightest neutralino (which could be the photino), the gravitino, or the lightest sneutrino. The sneutrino possibility is ruled out in the MSSM because of the limits on dark matter direct detection -- the sneutrino would have been detected by now if it makes up the dark matter. I'll think about how to implement something along these lines in the article. HEL 23:00, 30 September 2006 (UTC)[reply]

Ok, that's a start at least. HEL 01:20, 1 October 2006 (UTC)[reply]

Sneutrino

"Extended models with right-handed or sterile sneutrinos reopen the possibility of sneutrino dark matter by lowering the interaction cross section"

Do sneutrinos come in left- and right-handed versions? I thought only fermions did; the sneutrino is a scalar (spin-less) boson, so it wouldn't have chirality, would it? Stonemason89 (talk) 18:01, 10 December 2009 (UTC)[reply]