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2017

Bottom-quark Forward-Backward Asymmetry, Dark Matter and the LHC

Liu, Da, Liu, Jia, Wagner, Carlos E. M. et al.

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The LEP experiment at CERN provided accurate measurements of the $Z$ neutral gauge boson properties.

Although all measurements agree well with the SM predictions, the forward backward asymmetry of the bottom-quark remains almost 3$\sigma$ away from the SM value.
We proposed that this anomaly may be explained by the existence of a new $U(1)_D$ gauge boson, which couples with opposite charges to the right-handed components of the bottom and charm quarks.
Cancellation of gauge anomalies demands the presence of a vector-like singlet charged lepton as well as a neutral Dirac (or Majorana) particle that provides a Dark Matter candidate.

Bottom-quark Forward-Backward Asymmetry, Dark Matter and the LHC · Around

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