Search for the dark photon in $\pi^0$ decays

  • J. R. Batley (Contributor)
  • G. Kalmus (Contributor)
  • C. Lazzeroni (Contributor)
  • D. J. Munday (Contributor)
  • M. W. Slater (Contributor)
  • G. Wormser (Contributor)
  • R. Arcidiacono (Contributor)
  • G. Bocquet (Contributor)
  • N. Cabibbo (Contributor)
  • A. Ceccucci (Contributor)
  • D. Cundy (Contributor)
  • V. Falaleev (Contributor)
  • M. Fidecaro (Contributor)
  • L. Gatignon (Contributor)
  • A. Gonidec (Contributor)
  • W. Kubischta (Contributor)
  • A. Norton (Contributor)
  • A. Maier (Contributor)
  • M. Patel (Contributor)
  • A. Peters (Contributor)
  • S. Balev (Contributor)
  • P. L. Frabetti (Contributor)
  • E. Gersabeck (Contributor)
  • E. Goudzovski (Contributor)
  • P. Hristov (Contributor)
  • V. Kekelidze (Contributor)
  • V. Kozhuharov (Contributor)
  • L. Litov (Contributor)
  • D. Madigozhin (Contributor)
  • N. Molokanova (Contributor)
  • I. Polenkevich (Contributor)
  • Y. Potrebenikov (Contributor)
  • S. Stoynev (Contributor)
  • A. Zinchenko (Contributor)
  • E. Monnier (Contributor)
  • E. Swallow (Contributor)
  • R. Winston (Contributor)
  • P. Rubin (Contributor)
  • A. Walker (Contributor)
  • W. Baldini (Contributor)
  • A. Cotta Ramusino (Contributor)
  • P. Dalpiaz (Contributor)
  • C. Damiani (Contributor)
  • M. Fiorini (Contributor)
  • A. Gianoli (Contributor)
  • M. Martini (Contributor)
  • F. Petrucci (Contributor)
  • M. Savrié (Contributor)
  • M. Scarpa (Contributor)
  • H. Wahl (Contributor)
  • A. Bizzeti (Contributor)
  • M. Lenti (Contributor)
  • M. Veltri (Contributor)
  • M. Calvetti (Contributor)
  • E. Celeghini (Contributor)
  • E. Iacopini (Contributor)
  • G. Ruggier (Contributor)
  • M. Behler (Contributor)
  • K. Eppard (Contributor)
  • K. Kleinknecht (Contributor)
  • P. Marouelli (Contributor)
  • L. Masetti (Contributor)
  • U. Moosbrugger (Contributor)
  • Morales Morales (Contributor)
  • B. Renk (Contributor)
  • M. Wache (Contributor)
  • R. Wanke (Contributor)
  • A. Winhart (Contributor)
  • D. Coward (Contributor)
  • A. Dabrowski (Contributor)
  • T. Fonseca Martin (Contributor)
  • M. Shieh (Contributor)
  • M. Szleper (Contributor)
  • Mayda Velasco (Contributor)
  • M. Wood (Contributor)
  • P. Cenci (Contributor)
  • M. Pepe (Contributor)
  • M. C. Petrucci (Contributor)
  • G. Anzivino (Contributor)
  • E. Imbergamo (Contributor)
  • A. Nappi (Contributor)
  • M. Piccini (Contributor)
  • M. Raggi (Contributor)
  • M. Valdata-Nappi (Contributor)
  • C. Cerri (Contributor)
  • R. Fantechi (Contributor)
  • G. Collazuo (Contributor)
  • L. Dilella (Contributor)
  • G. Lamanna (Contributor)
  • I. Mannelli (Contributor)
  • A. Michetti (Contributor)
  • F. Costantini (Contributor)
  • N. Doble (Contributor)
  • L. Fiorini (Contributor)
  • S. Giudici (Contributor)
  • G. Pierazzini (Contributor)
  • M. Sozzi (Contributor)
  • S. Venditti (Contributor)
  • B. Bloch-Devaux (Contributor)
  • C. Cheshkov (Contributor)
  • J. B. Cheze (Contributor)
  • M. DeBeer (Contributor)
  • J. Derré (Contributor)
  • G. Marel (Contributor)
  • E. Mazzucato (Contributor)
  • B. Peyaud (Contributor)
  • B. Vallage (Contributor)
  • M. Holder (Contributor)
  • M. Ziolkowski (Contributor)
  • C. Biino (Contributor)
  • N. Cartiglia (Contributor)
  • F. Marchetto (Contributor)
  • S. Bifani (Contributor)
  • M. Clemencic (Contributor)
  • S. GoyLopez (Contributor)
  • H. Dibon (Contributor)
  • M. Jeitler (Contributor)
  • M. Markytan (Contributor)
  • I. Mikulec (Contributor)
  • G. Neuhofer (Contributor)
  • L. Widhalm (Contributor)
  • NA48/2 Collaboration (Creator)

Dataset

Description

CERN-NA-048. A sample of $1.69\times 10^7$ fully reconstructed $\pi^0\to\gamma e^+e^-$ decay candidates collected by the NA48/2 experiment at CERN in 2003--2004 is analysed to search for the dark photon ($A'$) production in the $\pi^0\to\gamma A'$ decay followed by the prompt $A'\to e^+e^-$ decay. No signal is observed, and an exclusion region in the plane of the dark photon mass $m_{A'}$ and mixing parameter $\varepsilon^2$ is established. The obtained upper limits on $\varepsilon^2$ are more stringent than the previous limits in the mass range $9~{\rm MeV}/c^2
Date made available2015
PublisherHEPData

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