Search for the dark photon in π0 decays by the NA48/2 experiment at CERN

Evgueni Goudzovski, G. Anzivino, R. Arcidiacono, W. Baldini, S. Balev, J. R. Batley, M. Behler, S. Bifani, C. Biino, A. Bizzeti, B. Bloch-Devaux, G. Bocquet, N. Cabibbo, M. Calvetti, N. Cartiglia, A. Ceccucci, P. Cenci, C. Cerri, C. Cheshkov, J. B. ChèzeM. Clemencic, G. Collazuol, F. Costantini, A. Cotta Ramusino, D. Coward, D. Cundy, A. Dabrowski, P. Dalpiaz, C. Damiani, M. De Beer, J. Derré, H. Dibon, L. Dilella, N. Doble, K. Eppard, V. Falaleev, R. Fantechi, M. Fidecaro, L. Fiorini, M. Fiorini, T. Fonseca Martin, P. L. Frabetti, L. Gatignon, E. Gersabeck, A. Gianoli, S. Giudici, A. Gonidec, E. Goudzovski, S. Goy Lopez, M. Velasco, NA48/2 Collaboration

Research output: Contribution to journalConference article

8 Scopus citations

Abstract

A sample of 4.687 × 106 fully reconstructed K+ → π+π0 D, π0 D → γe+e- decay candidates in the kinematic range mee > 10 MeV/c2 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+ → π+π0, π0 → γA', A' → e+e-. No signal is observed, and preliminary exclusion limits on space of dark photon mass m'A and mixing parameter ϵ2 are reported.

Original languageEnglish (US)
Article number01017
JournalEPJ Web of Conferences
Volume96
DOIs
StatePublished - Jan 1 2015
EventInternational Conference Dark Matter, Hadron Physics and Fusion Physics, DHF 2014 - Messina, Italy
Duration: Sep 24 2014Sep 26 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Goudzovski, E., Anzivino, G., Arcidiacono, R., Baldini, W., Balev, S., Batley, J. R., Behler, M., Bifani, S., Biino, C., Bizzeti, A., Bloch-Devaux, B., Bocquet, G., Cabibbo, N., Calvetti, M., Cartiglia, N., Ceccucci, A., Cenci, P., Cerri, C., Cheshkov, C., ... NA48/2 Collaboration (2015). Search for the dark photon in π0 decays by the NA48/2 experiment at CERN. EPJ Web of Conferences, 96, [01017]. https://doi.org/10.1051/epjconf/20159601017