Rare kaon decay to missing energy: Implications of the NA62 result for a Z′ model

Téssio B. De Melo, Sergey Kovalenko, Farinaldo S. Queiroz, C. Siqueira, Yoxara S. Villamizar

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


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.

Original languageEnglish
Article number115001
JournalPhysical Review D
Issue number11
Publication statusPublished - 1 Jun 2021

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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