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The ground state of the S=1/2 Heisenberg antiferomagnet on kagome can beviewed as a collection of fermionic spinons bound into small, heavy singletpairs. Low-energy magnetic excitations in this system correspond to breakingthe pairs into individual spinons. We calculate the structure factor forinelastic neutron scattering from independent spinon pairs.

Structure factor of low-energy spin excitations in a S=1/2 kagome antiferromagnet