Search for a new light boson in η decays using the WASA detector
National Centre for Nuclear Research, Warsaw, Poland
a e-mail: Joanna.Stepaniak@fuw.edu.pl
Published online: 26 November 2014
Some dark matter scenarios predict a light scalar boson that couples to charged leptons. Present experiments do not exclude the existence of a new light (M<1GeV) particle(s) with small coupling to leptons. It can manifest itself in η meson decays with electron-positron pair(s)in the final state. We present preliminary results from the search for η → π0 + (X → e+e−) decay in a total of 5 × 107 η mesons produced in the pp → ppη reaction, a fraction of the data collected in the WASA experiment.
© Owned by the authors, published by EDP Sciences, 2014
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