Production of Single Heavy Charged Leptons at a Linear Collider

Details Production of Single Heavy Charged Leptons at a Linear Collider Production of Single Heavy Charged Leptons at a Linear Collider

2008-03-07

arxiv.org/abs/0803.0996v1

Phys.Rev.D77:093001,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 7 figures

Scientific paper

10.1103/PhysRevD.77.093001

A sequential fourth generation of quarks and leptons is allowed by precision electroweak constraints if the mass splitting between the heavy quarks is between 50 and 80 GeV. Although heavy quarks can be easily detected at the LHC, it is very difficult to detect a sequential heavy charged lepton, L, due to large backgrounds. Should the L mass be above 250 GeV, it can not be pair-produced at a 500 GeV ILC. We calculate the cross section for the one-loop process e+e- -> L tau. Although the cross section is small, it may be detectable. We also consider contributions from the two Higgs doublet model and the Randall-Sundrum model, in which case the cross section can be substantially higher.

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