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Phys."],"abstract":"<jats:title>A<jats:sc>bstract<\/jats:sc>\n          <\/jats:title>\n          <jats:p>A two-Higgs doublet model with a discrete <jats:italic>Z<\/jats:italic>\n            <jats:sub>3<\/jats:sub> symmetry acquires, in its scalar and gauge sectors, an accidental continuous U(1) symmetry. One therefore finds, after spontaneous symmetry breaking of those symmetries, that a massless pseudoscalar arises, as expected by Goldstone\u2019s theorem. In the fermion sector, however, it is possible to obtain Yukawa matrix textures which distinguish between the <jats:italic>Z<\/jats:italic>\n            <jats:sub>3<\/jats:sub> and U(1) symmetries, so one expects loop corrections to originate a non-zero pseudoscalar mass for the <jats:italic>Z<\/jats:italic>\n            <jats:sub>3<\/jats:sub> case. We perform an explicit calculation that shows that at one-loop the pseudoscalar remains massless for all but one tested <jats:italic>Z<\/jats:italic>\n            <jats:sub>3<\/jats:sub> Yukawa matrices. The pseudoscalar mass thus found is highly suppressed by the hierarchy of fermion masses.<\/jats:p>","DOI":"10.1007\/jhep07(2025)264","type":"journal-article","created":{"date-parts":[[2025,7,29]],"date-time":"2025-07-29T00:53:27Z","timestamp":1753750407000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["One-loop pseudoscalar mass in a 2HDM with a Z3 symmetry"],"prefix":"10.1007","volume":"2025","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9351-1074","authenticated-orcid":false,"given":"P. 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