Polymerizable compound, polymerizable composition, polymer, and optically anisotropic body

A polymerizable compound represented by a formula (I),

• wherein Y1 to Y6 are independently a chemical single bond, —O—, —S—, —O—C(═O)—, —C(═O)—O—, —O—C(═O)—O—, —NR1—C(═O)—, —C(═O)—NR1—, —O—C(═O)—NR1—, —NR1—C(═O)—O—, —NR1—C(═O)—NR1—, —O—NR1—, or —NR1—O—, R1 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, G1 and G2 are independently a substituted or unsubstituted divalent aliphatic group having 1 to 20 carbon atoms that optionally includes —O—, —S—, —O—C(═O)—, —C(═O)—O—, —NR2—C(═O)—, —C(═O)—NR2—, —NR2—, or —C(═O)—, provided that a case where the aliphatic group includes two or more adjacent —O— or —S— is excluded, R2 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,
• Z1 and Z2 are independently an alkenyl group having 2 to 10 carbon atoms that is substituted with a halogen atom, or unsubstituted,
• Ax is an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring selected from a group consisting of an aromatic hydrocarbon ring and an aromatic hetero ring,
• Ay is a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 12 carbon atoms, —C(═O)—R3, —SO2—R6, or an organic group having 2 to 30 carbon atoms that includes at least one aromatic ring selected from a group consisting of an aromatic hydrocarbon ring and an aromatic hetero ring, provided that the aromatic ring included in Ax and Ay is substituted or unsubstituted, and
• Ax and Ay optionally bond to each other to form a ring, R3 is a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 12 carbon atoms, R6 is an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, a phenyl group, or a 4-methylphenyl group,
• A1 is a substituted or unsubstituted trivalent aromatic group,
• A2 and A3 are independently a substituted or unsubstituted divalent aromatic group having 6 to 30 carbon atoms, and
• Q1 is a hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms.