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One universal extra dimension in PYTHIA. (English) Zbl 1205.81137
Summary: The Universal Extra Dimensions model has been implemented in the Phytia generator from version 6.4.18 onwards, in its minimal formulation with one TeV\(^{-1}\)-sized extra dimension. The additional possibility of gravity-mediated decays, through a variable number of eV\(^{-1}\)-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. \(2 \to 2\) tree-level production cross sections and unpolarized KK number conserving 2-body decays are included. Mixing between iso-doublet and -singlet KK excitations is neglected thus far, and is expected to be negligible for all but the top sector.

MSC:
81V22 Unified quantum theories
83E15 Kaluza-Klein and other higher-dimensional theories
81T80 Simulation and numerical modelling (quantum field theory) (MSC2010)
Software:
ATLFAST; PYTHIA
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References:
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