Leptons and photons at the LHC: cascades through spinless adjoints

Details Leptons and photons at the LHC: cascades through spinless adjoints Leptons and photons at the LHC: cascades through spinless adjoints

2007-03-21

arxiv.org/abs/hep-ph/0703231v1

JHEP0707:006,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

33+1 pages, 14 figures

Scientific paper

10.1088/1126-6708/2007/07/006

We study the hadron collider phenomenology of (1,0) Kaluza-Klein modes along two universal extra dimensions compactified on the chiral square. Cascade decays of spinless adjoints proceed through tree-level 3-body decays involving leptons as well as one-loop 2-body decays involving photons. As a result, spectacular events with as many as six charged leptons, or one photon plus four charged leptons are expected to be observed at the LHC. Unusual events with relatively large branching fractions include three leptons of same charge plus one lepton of opposite charge, or one photon plus two leptons of same charge. We estimate the current limit from the Tevatron on the compactification scale, set by searches for trilepton events, to be around 270 GeV.

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