%0 Journal Article
%T A note on the tensor and vector exchange contributions to K (K)over-bar → K (K)over-bar, D(D)over-bar → D(D)over-bar and π+π- → π+π- reactions
%A Abreu, L. M.
%A Song, J.
%A Brandao, P. C. S.
%A Oset, E.
%J European Physical Journal A
%D 2024
%V 60
%N 3
%I Springer
%@ 1434-6001
%G English
%F Abreu_etal2024
%O WOS:001195442000001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=6036), last updated on Fri, 12 Apr 2024 07:15:41 +0000
%X In this note we study the tensor and vector exchange contributions to the elastic reactions involving the pseudoscalars mesons pi(+) pi(-), K+ K- and D+D-. In the case of the tensor-exchange contributions we assume that an intermediate tensor f(2)(1270) is dynamically generated from the interaction of two virtual rho mesons, with the use of a pole approximation. The calculation of the two-loop amplitude is facilitated since the triangle loops can be factorized and computed separately. The results show very small contributions coming from the tensor-exchange mechanisms when compared with those from the vector-exchange processes. We compare our results for pi pi and K (K) over bar scattering with those obtained in other works where the f2(1270) is considered as an ordinary q (q) over bar meson. Our picture provides a smaller contribution but of similar order of magnitude for pion scattering and stabilizes the results in the case of K (K) over bar, allowing us to make estimates for D (D) over bar scattering.
%R 10.1140/epja/s10050-024-01300-y
%U https://arxiv.org/abs/2310.14015
%U https://doi.org/10.1140/epja/s10050-024-01300-y
%P 76 - 10pp