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ensabah6
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SUSY, (SUSY-MSSM, SUSY-GR, M-theory) doubles the number of particles in the SM, but what about SUSY partners for mesons like pions?
javierR said:The super-partners of spin-1/2 particles obey bose-einstein statistics since they are either scalar or vector bosons. Therefore, there aren't smeson partners of the mesons. However, the partners of bosons such as the photon are fermions so that you *could* form composites of these; but superpartners have the same quantum numbers (other than spin) as their partners.
hamster143 said:That would imply that the lightest squark is a free stable particle with fractional charge. I'd expect that to be an easily detectable signature in cosmic ray detectors.
Vanadium 50 said:Why? The lightest squark can decay via [itex]\tilde{q} \rightarrow q + \tilde{\chi}}^2[/itex].
Since the original question is about a super-pion (meson), we can ask: In the effective field theory in which pions appear, are there superpartners for them? They would have to be effective fields with spin-1/2 and the same quantum numbers otherwise.
Hadronization never really occurs for a single quark, due to local conservation of color it always involves all initial "jets". If we produce squarks, we will produce them in pairs, and the hadronization for their decay quarks will involve presumably all "jets" as well.hamster143 said:If the lightest squark is free to begin with, then it's either prohibited to decay into the regular quark by QCD, or it decays into a free quark, which have never been observed (I'm not quite certain on this).
hamster143 said:If the lightest squark is free to begin with, then it's either prohibited to decay into the regular quark by QCD, or it decays into a free quark, which have never been observed (I'm not quite certain on this).
ensabah6 said:SUSY, (SUSY-MSSM, SUSY-GR, M-theory) doubles the number of particles in the SM, but what about SUSY partners for mesons like pions?
arivero said:Still, a naive counting for quark shows...
it also happen that the number of degrees of freedom of the leptons is the same that the number of mesons, charge by charge
hamster143 said:Should there be some kind of natural one-to-one mapping between these?
hamster143 said:it would be nice to provide some kind of mapping
SUSY stands for Supersymmetry, which is a theoretical framework in physics that suggests every fundamental particle has a partner particle with different spin quantum number.
Pions are subatomic particles that are made up of quarks. They are the lightest and most stable particles in the class of mesons and are involved in the strong nuclear force.
According to the theory of SUSY, pions should have partners called "pionsinos" that have the same mass and quantum numbers but with different spin. However, these partners have not been observed yet and their existence is still purely theoretical.
If the existence of SUSY-partners is confirmed, it would provide a solution to some of the problems in the Standard Model of particle physics, such as the hierarchy problem and the lack of symmetry between fermions and bosons.
SUSY-partners are predicted to have much higher masses than their corresponding particles in the Standard Model, which makes them difficult to detect directly. Scientists are currently searching for indirect evidence of their existence through experiments at high-energy particle accelerators.