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Search for dark photon at NA48/2, and measurement of $\pi^0$ form factor
The NA48/2 experiment at CERN performed a search for the dark photon (A′) via the decay chain π (0) → γA′, A′ → e (+) e (−). Using a sample of ∼ 1.7 · 10(7) neutral pions tagged from and decays collected in 2003-04 no signal is observed. The limits in the plane dark photon mixing parameter ε (2) ver...
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| Lenguaje: | eng |
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2017
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| Acceso en línea: | https://dx.doi.org/10.1088/1742-6596/800/1/012032 http://cds.cern.ch/record/2288065 |