Resumen: In this paper we deal with a scale of reproducing kernel Hilbert spaces H2 (n), n=0, which are linear subspaces of the classical Hilbertian Hardy space on the right-hand half-plane C+. They are obtained as ranges of the Laplace transform in extended versions of the Paley-Wiener theorem which involve absolutely continuous functions of higher degree. An explicit integral formula is given for the reproducing kernel Kz, n of H2 (n), from which we can find the estimate ¿Kz, n¿~|z|-1/2 for z¿C+. Then composition operators Cf:H2 (n)¿H2 (n), Cff=f°f, on these spaces are discussed, giving some necessary and some sufficient conditions for analytic maps f:C+¿C+ to induce bounded composition operators. Idioma: Inglés DOI: 10.1016/j.jmaa.2020.124131 Año: 2020 Publicado en: JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS 489, 1 (2020), 124131 1-25 ISSN: 0022-247X Factor impacto JCR: 1.583 (2020) Categ. JCR: MATHEMATICS rank: 63 / 330 = 0.191 (2020) - Q1 - T1 Categ. JCR: MATHEMATICS, APPLIED rank: 109 / 265 = 0.411 (2020) - Q2 - T2 Factor impacto SCIMAGO: 0.95 - Applied Mathematics (Q1) - Analysis (Q1)