Production of <math> <mo>(</mo> <mtext>anti-</mtext> <mo>)</mo> <mmultiscripts> <mi>He</mi> <mprescripts></mprescripts> <none></none> <mn>3</mn> </mmultiscripts> </math> and <math> <mo>(</mo> <mtext>anti-</mtext> <mo>)</mo> <mmultiscripts> </mmultiscripts></math>