Journal
PHYSICS LETTERS B
Volume 725, Issue 4-5, Pages 310-315Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2013.07.014
Keywords
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Funding
- Ministry of Economy and Competitiveness (MINECO) [FPA2006-05294, FPA2010-17915, FPA2011-23897]
- Junta de Andalucia [FQM 101, FQM 6552]
- Generalitat Valenciana grant [PROME-TEO/2009/128]
- US Department of Energy [DE-FG03-94ER40837]
- MINECO under FPU program
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Many Standard Model extensions predict doubly-charged scalars; in particular, all models with resonances in charged lepton-pair channels with non-vanishing lepton number; if these are pair produced at the LHC, the observation of their decay into l(-/+)l(-/+)W(-/+)W(-/+) will be necessary in order to establish their lepton-number violating character, which is generally not straightforward. Nonetheless, the analysis of events containing four charged leptons (including scalar decays into one or two taus as well as into W bosons) makes it possible to determine whether the doubly-charged excitation belongs to a multiplet with weak isospin T = 0,1/2,1,3/2 or 2 (assuming there are no excitations with charge > 2); though discriminating between the isosinglet and isodoublet cases is possible only if charged-current events cannot produce the doubly-charged isosinglet (C) 2013 Elsevier B.V. All rights reserved.
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