Calculates the total width for s-channel mediated dark matter:
q dark matter
\\ med. //
==========
// \\
q dark matter
Gamma_min = Gamma_DM + sum_q Gamma_qq + sum_l Gamma_ll
type: indicates whether the mediator has vector or axial-vector symmetry
gQ: coupling of mediator to quarks
gDM: coupling of mediator to dark matter
gL: coupling of mediator to charged leptons (neutrino coupling fixed by gauge invariance; only implemented for V/A models)
mMed: mass of mediator in GeV
mDM: mass of dark matter in GeV
Calculates the total width for t-channel mediated dark matter:
q ============ dark matter
||
|| med.
||
q ============ dark matter
Mediator is different for each type of quark.
Simplify and assume that the mediators have all the same mass.
type: indicates type of the mediator (tchan)
gQ: coupling of mediator to quarks
gDM: coupling of mediator to dark matter
mMed: mass of mediator in GeV
mDM: mass of dark matter in GeV