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

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 u...

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Autores principales: de Melo, Téssio B., Kovalenko, Sergey, Queiroz, Farinaldo S., Siqueira, C., Villamizar, Yoxara S.
Lenguaje:eng
Publicado: 2021
Materias:
hep-ph
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.103.115001
http://cds.cern.ch/record/2771844
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author de Melo, Téssio B.
Kovalenko, Sergey
Queiroz, Farinaldo S.
Siqueira, C.
Villamizar, Yoxara S.
author_facet de Melo, Téssio B.
Kovalenko, Sergey
Queiroz, Farinaldo S.
Siqueira, C.
Villamizar, Yoxara S.
author_sort de Melo, Téssio B.
collection CERN
description 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.
id cern-2771844
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2021
record_format invenio
spelling cern-27718442023-01-31T11:02:03Zdoi:10.1103/PhysRevD.103.115001http://cds.cern.ch/record/2771844engde Melo, Téssio B.Kovalenko, SergeyQueiroz, Farinaldo S.Siqueira, C.Villamizar, Yoxara S.Rare kaon decay to missing energy: Implications of the NA62 result for a $Z′$ modelhep-phParticle Physics - PhenomenologyMeson 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.Meson decays offer a good opportunity to probe new physics. The rare kaon decay $K^+ \rightarrow \pi^+ \nu\bar{\nu}$ is one of the cleanest of them and, for this reason, is rather sensitive to new physics, in particular, vector mediators. NA62 collaboration, running a fixed-target experiment at CERN, recently reported an unprecedented sensitivity to this decay, namely a branching fraction of $BR(K^+ \rightarrow \pi^+ \nu\bar{\nu}) = (11^{+4.0}_{-3.5})\times 10^{-11}$ 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 $Z^\prime$ model, and put our findings into perspective with the correlated $K_L \rightarrow \pi^0 \nu \bar{\nu}$ decay measured by KOTO collaboration, current, and future colliders, namely the High-Luminosity and High-Energy LHC.arXiv:2102.06262oai:cds.cern.ch:27718442021-02-11
spellingShingle hep-ph
Particle Physics - Phenomenology
de Melo, Téssio B.
Kovalenko, Sergey
Queiroz, Farinaldo S.
Siqueira, C.
Villamizar, Yoxara S.
Rare kaon decay to missing energy: Implications of the NA62 result for a $Z′$ model
title Rare kaon decay to missing energy: Implications of the NA62 result for a $Z′$ model
title_full Rare kaon decay to missing energy: Implications of the NA62 result for a $Z′$ model
title_fullStr Rare kaon decay to missing energy: Implications of the NA62 result for a $Z′$ model
title_full_unstemmed Rare kaon decay to missing energy: Implications of the NA62 result for a $Z′$ model
title_short Rare kaon decay to missing energy: Implications of the NA62 result for a $Z′$ model
title_sort rare kaon decay to missing energy: implications of the na62 result for a $z′$ model
topic hep-ph
Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.103.115001
http://cds.cern.ch/record/2771844
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AT queirozfarinaldos rarekaondecaytomissingenergyimplicationsofthena62resultforazmodel
AT siqueirac rarekaondecaytomissingenergyimplicationsofthena62resultforazmodel
AT villamizaryoxaras rarekaondecaytomissingenergyimplicationsofthena62resultforazmodel

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