Rare kaon decay to missing energy: Implications of the NA62 result for a Z′ model
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Fecha
2021-06
Profesor/a Guía
Facultad/escuela
Idioma
en
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Editor
American Physical Society
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Licencia CC
Atribución 4.0 Internacional (CC BY 4.0)
Licencia CC
https://creativecommons.org/licenses/by/4.0/deed.es
Resumen
Meson decays offer a good opportunity to probe new physics. The rare kaon decay K+→π+νν¯ 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+→π+νν¯)=(11-3.5+4.0)×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 Z′ model, and put our findings into perspective with the correlated KL→π0νν¯ decay measured by the KOTO Collaboration, current, and future colliders, namely the High-Luminosity and High-Energy Large Hadron Collider. © 2021 authors. Published by the American Physical Society.
Notas
Indexación:Scopus
Palabras clave
Vector mediators, Z′ model, Resultado NA62
Citación
Physical Review D Volume 103, Issue 111 June 2021 Article number 115001
DOI
10.1103/PhysRevD.103.115001