which particle, in theory, is the more massive, the Higgs or the lightest supersymmetric particle?

Answer 1

Well your question could have several different answers actually, the world's most wanted particle, the Higgs, may have already appeared under our very noses without anyone noticing.

The hypothetical Higgs boson, which is thought to give all other particles their mass, was first proposed in the 1960s as part of the standard model of particle physics. Other models known as "supersymmetric" theories,(Which ill go ahead and tell you have less mass then higgs) which posit a heavy counterpart for every particle in the standard model, predict the existence of many different Higgs bosons, each with a different mass. It is the lightest one of these that may have already been produced, according to physicist German Valencia at Iowa State University in Ames, Iowa.

Valencia and colleagues re-analysed data collected between 1997 and 1999 by the HyperCP experiment at Fermilab in Batavia, Illinois. HyperCP was designed to monitor the decay of exotic particles in order to understand why the universe is filled with matter rather than antimatter. This concludes to the data analyzed by scientists everywhere.

Basically, the top quark, lightest sparticle (LSP), and Higgs scalar masses ... quark mass lies close to its measured value, together with the cosmological Value, The Higgs is the most massive.

Hope this helps.

Answer 2

If i had to take an educated guess I'll say the lightest supersymmetric particle because it is not an elementary particle and the Higgs are elementary particles that is, they are the simplest particle with no substructure unlike a supersymmetric particle.