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Title: Search for the dark photon in π0 decays

Journal Article · · Physics Letters. B
 [1]
  1. Univ. of Cambridge, Cambridge (United Kingdom). et al.

A sample of 1.69 × 107 fully reconstructed π0 → γe+e decay candidates collected by the NA48/2 experiment at CERN in 2003–2004 is analyzed to search for the dark photon (A') production in the π0→γA' decay followed by the prompt A' → e+e decay. No signal is observed, and an exclusion region in the plane of the dark photon mass mA' and mixing parameter ε2 is established. The obtained upper limits on ε2 are more stringent than the previous limits in the mass range 9 MeV/c2 < mA' < 70 MeV/c2. Furthermore, the NA48/2 sensitivity to the dark photon production in the K± → π± A' decay is also evaluated.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
Na48/2 Collaboration
Grant/Contract Number:
AC02-76SF0051
OSTI ID:
1261187
Journal Information:
Physics Letters. B, Vol. 746, Issue C; ISSN 0370-2693
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 232 works
Citation information provided by
Web of Science

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Constraints on the $U(1)_L$ gauge boson in a wide mass range text January 2015
Search for a muonic dark force at BABAR text January 2016
Neutrinophilic Non-Standard Interactions text January 2016
Particle Physics Models for the 17 MeV Anomaly in Beryllium Nuclear Decays text January 2016
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Revisiting Supernova 1987A Constraints on Dark Photons text January 2016
Examining the origin of dark matter mass at colliders text January 2016
The Muon g-2 experiment at Fermilab text January 2017
Point Sources from Dissipative Dark Matter text January 2017
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Neutrino oscillations and Non-Standard Interactions preprint January 2017
Search for a Hypothetical 16.7 MeV Gauge Boson and Dark Photons in the NA64 Experiment at CERN text January 2018
Dark Sectors at the Fermilab SeaQuest Experiment text January 2018
Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case text January 2018
Dark matter search in missing energy events with NA64 text January 2019
$Z'$ Mediated WIMPs: Dead, Dying, or Soon to be Detected? text January 2019
Searching for Dark Photons at the LHeC and FCC-he text January 2019
Search for Dark Photons Produced in 13 TeV pp Collisions text January 2018
Dark photon production through positron annihilation in beam-dump experiments text January 2018
Prospects for Beyond the Standard Model Physics Searches at the Deep Underground Neutrino Experiment text January 2020
Searching for $Z'$ bosons at the P2 experiment text January 2021


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