One Universal Extra Dimension in Pythia

Understand

The Universal Extra Dimensions model has been implemented in the Pythia generator from version 6.4.18 onwards, in its minimal formulation with one inverse-TeV-sized extra dimension.

• The additional possibility of gravity-mediated decays, through a variable number of inverse-eV-sized extra dimensions into which only gravity extends, is also available.
• The implementation covers the lowest-lying Kaluza-Klein (KK) excitations of Standard Model particles, except for the excitations of the Higgs fields, with the mass spectrum calculated at one loop.
• 2 -> 2 tree-level production cross sections and KK number conserving 2-body decays are included.