== Z and Z' phenomenology at the LHC ==

=== People ===

        Valentin Hirshi, Fabio Maltoni, Francesco Tramontano

=== Motivations ===

        Many BSM models predict the existence of a parter of the Z with enhanced (suppressed) couplings to  heavy  (light) fermions. 
This might entail a strong suppression of the production rates, as for the Higgs. We explore the idea that, as for the Higgs, the
gluon gluon channel might actually provide the leading production channel. 

=== Working plan ===

  Phase I

   * Verify (or not) Bij and Glover calculation  ([attachment:NPBnigel.pdf paper]). This can be done by explicit
      comparison or by checking the decay results.
   * Study the heavy top limit of the calculation and build the corresponding EFT. 
   * Implement the EFT in Feynrules.
   * Perform the calculation directly in the EFT and check the results.

  Phase II

   * Write a code (Mathematica or Fortran or C++) which calculates cross section at hadron colliders. 
   * Study the NNNLO effects on the Z and Z' inclusive cross section (Fabio has a code for NNLO Z production).
   * Implement the effective field theory in MadGraph and the full calculation correction.

  Phase III
 
   * Get to know the models which predict a fermiophobic Z' in detail.
   * Construct a reasonable parameter space to be studied, including indirect constraints.
   * Propose discovery channels at the LHC.

  Phase IV
 
   * Write the report and paper

  Phase V

   *  Book the flight to Stocholm


=== Status and reports ===


   * Here information on the status of the project is collected.