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The generation of the baryon asymmetry of the Universe (BAU) from thehypermagnetic helicity, the physical interpretation of which is given in termsof hypermagnetic knots, is studied in inflationary cosmology, taking intoaccount the breaking of the conformal invariance of hypercharge electromagneticfields through both a coupling with the dilaton and that with a pseudoscalarfield. It is shown that if the electroweak phase transition (EWPT) is stronglyfirst order and the present amplitude of the generated magnetic fields on thehorizon scale is sufficiently large, a baryon asymmetry with a sufficientmagnitude to account for the observed baryon to entropy ratio can be generated.Comment: 16 pages, 2 figures, a reference added, typos correcte

Baryon asymmetry from hypermagnetic helicity in dilaton hypercharge electromagnetism