# Antifields in BV formalism - do they also have gauge transformation laws?

I am studying Weinberg Vol 2 and the BV formalism of the gauge theory.

There, the antifields are introduced somewhat out of thin air. I am a little bit confused about their properties.

For example, there must be an antifield corresponding to the gauge boson according to the BV formalism. Then, what is the gauge transformation law of that specific antifield?

Or do I misunderstand the structure of the formalism? Could anyone please clarify?

2. In more detail, in the BRST formulation, the (infinitesimal) gauge transformations are transcribed into a BRST transformation $${\rm s}$$ of an extended BRST multiplet of original and auxiliary fields.
3. In the Batalin-Vilkovisky (BV) formalism, which is a BRST formulation, the BRST transformation $${\rm s}=(S,\cdot)$$ is the antibracket with the BV action $$S$$ in one slot.