601 f(-p₁) + f(-p₂) → H(b(p₃) + b(p₄)) + H(τ^-(p₅) + τ⁺(p₆))

601.1 HH production, processes 601–602

These processes represent the production of a pair of Higgs bosons. The production proceeds through gluon-fusion one-loop diagrams involving loops of top quarks. The formulae implemented in the code are taken from ref. [1], where the two Higgs bosons are treated as being on-shell. To enforce this condition, the code sets zerowidth to true, overriding the value set in the input file. The calculation can be performed at LO only, (i.e. one-loop order only). Two decays of the Higgs bosons are currently foreseen, although other decays can easily be implemented. In process 601, one Higgs boson decays to a pair of b-quarks, and the other decays to a pair of τ’s. In process 602, one Higgs boson decays to a pair of b-quarks, and the other decays to a pair of photons.

601.2 Plotter

nplotter˙auto.f is the default plotting routine.

601.3 Example input and output file(s)

input601.ini process601.out

References