Search for the dark photon in $\pi^0$ decays by the NA48/2 experiment at CERN

A sample of $4.687\times 10^6$ fully reconstructed $K^\pm\to\pi^\pm\pi^0_D$, $\pi^0_D\to\gamma e^+e^-$ decay candidates in the kinematic range $m_{ee}>10~{\rm MeV}/c^2$ with a negligible background contamination collected by the NA48/2 experiment at CERN in 2003-04 is analysed to search for the d...

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Detalles Bibliográficos
Autor principal: Goudzovski, Evgueni
Lenguaje:eng
Publicado: 2014
Materias:
hep-ex
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1051/epjconf/20159601017
http://cds.cern.ch/record/1979116
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author Goudzovski, Evgueni
author_facet Goudzovski, Evgueni
author_sort Goudzovski, Evgueni
collection CERN
description A sample of $4.687\times 10^6$ fully reconstructed $K^\pm\to\pi^\pm\pi^0_D$, $\pi^0_D\to\gamma e^+e^-$ decay candidates in the kinematic range $m_{ee}>10~{\rm MeV}/c^2$ with a negligible background contamination collected by the NA48/2 experiment at CERN in 2003-04 is analysed to search for the dark photon ($A'$) via the decay chain $K^\pm\to\pi^\pm\pi^0$, $\pi^0\to\gamma A'$, $A'\to e^+e^-$. No signal is observed, and preliminary exclusion limits on space of dark photon mass $m_A'$ and mixing parameter $\varepsilon^2$ are reported.
id cern-1979116
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
record_format invenio
spelling cern-19791162021-07-15T23:52:29Zdoi:10.1051/epjconf/20159601017http://cds.cern.ch/record/1979116engGoudzovski, EvgueniSearch for the dark photon in $\pi^0$ decays by the NA48/2 experiment at CERNhep-exParticle Physics - ExperimentA sample of $4.687\times 10^6$ fully reconstructed $K^\pm\to\pi^\pm\pi^0_D$, $\pi^0_D\to\gamma e^+e^-$ decay candidates in the kinematic range $m_{ee}>10~{\rm MeV}/c^2$ with a negligible background contamination collected by the NA48/2 experiment at CERN in 2003-04 is analysed to search for the dark photon ($A'$) via the decay chain $K^\pm\to\pi^\pm\pi^0$, $\pi^0\to\gamma A'$, $A'\to e^+e^-$. No signal is observed, and preliminary exclusion limits on space of dark photon mass $m_A'$ and mixing parameter $\varepsilon^2$ are reported.A sample of 4.687 x 10^6 fully reconstructed K^+- -> pi^+-pi^0_D, pi^0_D -> gammae^+e^- decay candidates in the kinematic range m_ee > 10 MeV/c^2 with a negligible background contamination collected by the NA48/2 experiment at CERN in 2003-04 is analysed to search for the dark photon (A') via the decay chain K^+- -> pi^+-pi^0, pi^0 -> gammaA', A' -> e^+e^-. No signal is observed, and preliminary exclusion limits on space of dark photon mass m'_A and mixing parameter epsilon^2 are reported.A sample of $4.687\times 10^6$ fully reconstructed $K^\pm\to\pi^\pm\pi^0_D$, $\pi^0_D\to\gamma e^+e^-$ decay candidates in the kinematic range $m_{ee}>10~{\rm MeV}/c^2$ with a negligible background contamination collected by the NA48/2 experiment at CERN in 2003-04 is analysed to search for the dark photon ($A'$) via the decay chain $K^\pm\to\pi^\pm\pi^0$, $\pi^0\to\gamma A'$, $A'\to e^+e^-$. No signal is observed, and preliminary exclusion limits on space of dark photon mass $m_A'$ and mixing parameter $\varepsilon^2$ are reported.arXiv:1412.8053oai:cds.cern.ch:19791162014-12-27
spellingShingle hep-ex
Particle Physics - Experiment
Goudzovski, Evgueni
Search for the dark photon in $\pi^0$ decays by the NA48/2 experiment at CERN
title Search for the dark photon in $\pi^0$ decays by the NA48/2 experiment at CERN
title_full Search for the dark photon in $\pi^0$ decays by the NA48/2 experiment at CERN
title_fullStr Search for the dark photon in $\pi^0$ decays by the NA48/2 experiment at CERN
title_full_unstemmed Search for the dark photon in $\pi^0$ decays by the NA48/2 experiment at CERN
title_short Search for the dark photon in $\pi^0$ decays by the NA48/2 experiment at CERN
title_sort search for the dark photon in $\pi^0$ decays by the na48/2 experiment at cern
topic hep-ex
Particle Physics - Experiment
url https://dx.doi.org/10.1051/epjconf/20159601017
http://cds.cern.ch/record/1979116
work_keys_str_mv AT goudzovskievgueni searchforthedarkphotoninpi0decaysbythena482experimentatcern

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