2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198637The contribution of Δisobar to the correction on proton polarizability in the hyperfine splitting of hydrogen and muonic hydrogen is calculated with the account of the experimental data on N-Δtransition form factors.7 pages, LaTEX, 1 figure, uses linedraw.styHigh Energy Physics - Phenomenologytext