Convention Correction Lowers Discrepancy in B^0→(ρπ)^0 Decay Measurement

A new analysis indicates that a previously mismatched helicity-isospin convention in B^0→(ρπ)^0 decay measurements contributed to a discrepancy in determining the unitarity-triangle angle α. Correcting this convention significantly reduces the tension between direct and indirect determinations of α from 2.9σ to 2.1σ, refining a crucial measurement in particle physics.