| Texto completo | |
| Autor(es): |
de Melo, Tessio B.
;
Kovalenko, Sergey
;
Queiroz, Farinaldo S.
;
Siqueira, C.
;
Villamizar, Yoxara S.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 103, n. 11, p. 9-pg., 2021-06-01. |
| Resumo | |
Meson decays offer a good opportunity to probe new physics. The rare kaon decay K+ -> pi(+) nu(nu) over bar is one of the cleanest of them and, for this reason, is rather sensitive to new physics, in particular, vector mediators. The NA62 Collaboration, running a fixed-target experiment at CERN, recently reported an unprecedented sensitivity to this decay, namely a branching fraction of BR(K+ -> pi(+) nu(nu) over bar) = (11(-3.5)(+4.0)) x 10(-11) at 68% C.L. Vector mediators that couple to neutrinos may yield a sizeable contribution to this decay. Motivated by the new measurement, we interpret this result in the context of a concrete Z0 model, and put our findings into perspective with the correlated K-L -> pi(0)nu(nu) over bar decay measured by the KOTO Collaboration, current, and future colliders, namely the High-Luminosity and High-Energy Large Hadron Collider. (AU) | |
| Processo FAPESP: | 20/00320-9 - Busca por matéria escura à luz do CTA (Cherenkov Telescope Array) |
| Beneficiário: | Clarissa Martins Siqueira |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 16/01343-7 - ICTP Instituto Sul-Americano para Física Fundamental: um centro regional para física teórica |
| Beneficiário: | Nathan Jacob Berkovits |
| Modalidade de apoio: | Auxílio à Pesquisa - Projetos Especiais |
| Processo FAPESP: | 15/15897-1 - Cherenkov Telescope Array - CTA |
| Beneficiário: | Luiz Vitor de Souza Filho |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |