Sfermions are hypothetical particles in supersymmetric theories that are the superpartners of fermions. They are spin-0 particles and are expected to interact with the Higgs boson through Yukawa couplings, which are responsible for giving particles their mass.
The coupling of sfermions to the Higgs boson plays a crucial role in supersymmetric theories because it is responsible for ensuring the stability of the Higgs boson's mass. This is known as the "Higgs mass hierarchy problem" and is one of the main motivations for supersymmetry.
The couplings of sfermions to the Higgs boson can impact the production and decay rates of supersymmetric particles at the LHC. By studying these interactions, scientists can gain insight into the properties of supersymmetric particles and potentially discover new physics beyond the Standard Model.
Yes, there have been numerous experimental studies and theoretical calculations that have placed constraints on the couplings of sfermions to the Higgs boson. These constraints are important for validating supersymmetric theories and for guiding future experiments.
The couplings of sfermions to the Higgs boson are crucial for stabilizing the Higgs potential in supersymmetric theories. Without these interactions, the Higgs potential would be unstable and the Higgs boson mass would be highly sensitive to quantum corrections. The couplings help to cancel out these corrections and preserve the stability of the Higgs potential.