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

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

NA48/2

Collaboration

•

J.R. Batley
(
- Cambridge U.
)

Apr 2, 2015

8 pages

Published in:

Phys.Lett.B 746 (2015) 178-185

Published: May 5, 2015

e-Print:

1504.00607 [hep-ex]

DOI:

10.1016/j.physletb.2015.04.068

PDG: Hidden Photons: Kinetic Mixing Parameter Limits

Report number:

CERN-PH-EP-2015-093

Experiments:

CERN-NA-048-2

View in:

reference search413 citations

Citations per year

Abstract: (Elsevier)

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

Note:

Revised version accepted for publication in Physics Letter B

photon: hidden sector
photon: mass
NA48
sensitivity
CERN SPS
photon: mixing
pi0: electromagnetic decay
electron positron: mass spectrum
experimental results
K: decay

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