SCENARIO D

In this model the axigluon decays to a standard model quark and its heavy partner. There are heavy
quark partners for 1st and 2nd generation right-handed standard model
quarks. The partners of u_r, c_r, d_r and s_r are called hur, hcr, hdr
and hsr. The heavy quarks then decay to their standard model partner
and a color singlet scalar eta. The eta decays to a b bbar pair.

########################################

PARAMETERS:
(all the parameters are explicitly defined in our paper 1209.6375)

gaxi: coupling of the axigluon to the light quarks, corresponds to $g_A$ in our paper. The couplings to heavy quarks are all determined once this is fixed by the relations described in appendix A of our paper.

lA: Coupling of the axion to a heavy quark and a SM quark, corresponds to $\lambda_A$ in our paper.

lB: Coupling of the axion to b bbar, corresponds to $\lambda_b$ in our paper.


#######################################

HOW TO GENERATE THE FULL DECAY CHAIN

> define heavy = hur hur~ hcr hcr~ hdr hdr~ hsr hsr~

> define jets = u u~ c c~ d d~ s s~

> generate p p > axi axi, ( axi > heavy jets, (heavy > jets eta, eta > b b~ ) )