Why is SUSY Breaking so Difficult?! - Institute for Particle Physics ...
Why is SUSY Breaking so Difficult?! - Institute for Particle Physics ...
Why is SUSY Breaking so Difficult?! - Institute for Particle Physics ...
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R-symmetryWhat <strong>is</strong> it?It’s a global U(1) symmetry which doesn’t commute with thesupercharges:[Q, R ] = Q , [Q, R ] = −QDifferent components of chiral superfields carry different R-charge:Φ = φ + ψ θ + F θ 2 =⇒ R[θ] = 1 , R[dθ] = −1s s s−1 s−2And hence <strong>so</strong> does the superpotential:[∫ ]R d 2 θ W (Φ) = 0 =⇒ R[W ] = 2(I.P.P.P. — Durham University) <strong>SUSY</strong> <strong>Breaking</strong> Heidelberg 9 / 27