Searching for doubly charged leptons at present and future colliders

Biondini, S. and Panella, O. and Pancheri, G. and Srivastava, Y. N. and Fanó, L. (2014) Searching for doubly charged leptons at present and future colliders. Il nuovo cimento C, 37 (1). pp. 91-97. ISSN 1826-9885

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The production at the LHC of exotic excited leptons of charge Q = +2e is considered. Such states are predicted in composite models with extended isospin multiplets (IW = 1 and IW = 3/2). The coupling among these doubly charged leptons and Standard Model fermions may occur either via gauge or contact interactions. In the former case the decay channels are more constrained. We study the production cross section at the LHC of L++ (pp → L++ −) and focus on the leptonic signature deriving from the subsequent decays L++ → W+ + → + + νl. The invariant mass distribution of the like-sign dilepton exhibits a sharp end-point corresponding to excited doubly charged lepton mass m∗. A preliminary study for the production of doubly charged leptons at the future linear colliders, by considering the process e−e− → L−− e νe, is carried out. Both the contact and gauge interaction mechanisms are investigated and compared.

Item Type: Article
Uncontrolled Keywords: Composite models ; Other charged heavy leptons ; Other particles (including hypothetical)
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 14 May 2020 16:37
Last Modified: 14 May 2020 16:37

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