Leptons and photons at the LHC: cascades through spinless adjoints | Zendy

Bogdan A. Dobrescu | Zendy; Kyoungchul Kong | Zendy; Rakhi Mahbubani | Zendy

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Leptons and photons at the LHC: cascades through spinless adjoints

Author(s) -

Bogdan A. Dobrescu,

Kyoungchul Kong,

Rakhi Mahbubani

Publication year - 2007

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2007/07/006

Subject(s) - physics , lepton , particle physics , large hadron collider , tevatron , photon , nuclear physics , hadron , physics beyond the standard model , phenomenology (philosophy) , electron , quantum mechanics , philosophy , epistemology

We study the hadron collider phenomenology of (1,0) Kaluza-Klein modes alongtwo universal extra dimensions compactified on the chiral square. Cascadedecays of spinless adjoints proceed through tree-level 3-body decays involvingleptons 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 fourcharged leptons are expected to be observed at the LHC. Unusual events withrelatively large branching fractions include three leptons of same charge plusone 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.Comment: 33+1 pages, 14 figure

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